Alex Szalay is a Bloomberg Distinguished Professor of physics and astronomy and computer science at the Johns Hopkins University School of Arts and Sciences and Whiting School of Engineering.Brooks, Kell
"Johns Hopkins names four new Bloomberg Distinguished Professors"
''JHU Hub'', Baltimore, 30 March 2015. Retrieved on 27 July 2015. Szalay is an international leader in

astronomy Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, and chemistry in order to explain their origin and their overall evolution. Objects of interest includ ...

cosmology Cosmology () is a branch of physics and metaphysics dealing with the nature of the universe, the cosmos. The term ''cosmology'' was first used in English in 1656 in Thomas Blount's ''Glossographia'', with the meaning of "a speaking of the wo ...

, the science of

big data Big data primarily refers to data sets that are too large or complex to be dealt with by traditional data processing, data-processing application software, software. Data with many entries (rows) offer greater statistical power, while data with ...

, and

data-intensive computing Data-intensive computing is a class of parallel computing applications which use a data parallel approach to process large volumes of data typically terabytes or petabytes in size and typically referred to as big data. Computing applications that ...

. In 2023, he was elected to the

National Academy of Sciences The National Academy of Sciences (NAS) is a United States nonprofit, NGO, non-governmental organization. NAS is part of the National Academies of Sciences, Engineering, and Medicine, along with the National Academy of Engineering (NAE) and the ...

Biography

Alexander Sándor Szalay, Jr. was born in Hungary. His father is Sándor Szalay, who is considered “the father of nuclear physics in Hungary” for his discovery of a natural enrichment mechanism of uranium and

neutrino A neutrino ( ; denoted by the Greek letter ) is an elementary particle that interacts via the weak interaction and gravity. The neutrino is so named because it is electrically neutral and because its rest mass is so small ('' -ino'') that i ...

s. Szalay graduated with a Bachelor of Science degree in

Physics Physics is the scientific study of matter, its Elementary particle, fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. "Physical science is that department of knowledge whi ...

in 1969 from Kossuth University, now

University of Debrecen The University of Debrecen ( ) is a university located in Debrecen, Hungary. It is the oldest continuously operating institution of higher education in Hungary ever since its establishment in 1538. The university has a well established progra ...

, in Hungary. He then received a Master of Science in

Theoretical Physics Theoretical physics is a branch of physics that employs mathematical models and abstractions of physical objects and systems to rationalize, explain, and predict List of natural phenomena, natural phenomena. This is in contrast to experimental p ...

1972 and a Ph.D in

Astrophysics Astrophysics is a science that employs the methods and principles of physics and chemistry in the study of astronomical objects and phenomena. As one of the founders of the discipline, James Keeler, said, astrophysics "seeks to ascertain the ...

in 1975 from the

Eötvös Loránd University Eötvös Loránd University (, ELTE, also known as ''University of Budapest'') is a Hungarian public research university based in Budapest. Founded in 1635, ELTE is one of the largest and most prestigious public higher education institutions in ...

in Budapest. During this period, from 1974 to 1982, Szalay also played guitar in the Hungarian rock band Panta Rhei (band). After graduation Szalay spent postdoctoral periods at the

University of California, Berkeley The University of California, Berkeley (UC Berkeley, Berkeley, Cal, or California), is a Public university, public Land-grant university, land-grant research university in Berkeley, California, United States. Founded in 1868 and named after t ...

University of Chicago The University of Chicago (UChicago, Chicago, or UChi) is a Private university, private research university in Chicago, Illinois, United States. Its main campus is in the Hyde Park, Chicago, Hyde Park neighborhood on Chicago's South Side, Chic ...

, and

Fermilab Fermi National Accelerator Laboratory (Fermilab), located in Batavia, Illinois, near Chicago, is a United States Department of Energy United States Department of Energy National Labs, national laboratory specializing in high-energy particle phys ...

, before accepting an assistant professorship at

in 1982. After rising to the rank of full professor at Eötvös, he joined

Johns Hopkins University The Johns Hopkins University (often abbreviated as Johns Hopkins, Hopkins, or JHU) is a private university, private research university in Baltimore, Maryland, United States. Founded in 1876 based on the European research institution model, J ...

in 1989. Subsequently, he was named the Alumni Centennial Chair in 1998 and earned a secondary appointment in the Department of Computer Science in 2001. In 2008, he became Doctor Honoris Causa of the

. In March 2015, Szalay was named a Bloomberg Distinguished Professor at

for his accomplishments as an interdisciplinary researcher and excellence in teaching.Anderson, Nick
"Bloomberg pledges $350 million to Johns Hopkins University"
''The Washington Post'', Washington, D.C., 23 January 2013. Retrieved on 12 March 2015. The Bloomberg Distinguished Professorship program was established in 2013 by a gift from

Michael Bloomberg Michael Rubens Bloomberg (born February 14, 1942) is an American businessman and politician. He is the majority owner and co-founder of Bloomberg L.P., and was its CEO from 1981 to 2001 and again from 2014 to 2023. He served as the 108th mayo ...

. Szalay holds joint appointments in the

Zanvyl Krieger School of Arts and Sciences The Krieger School of Arts and Sciences is the college of arts and sciences at the Johns Hopkins University, a private university in Baltimore, Maryland. The school is based on the university's Homewood campus and, together with the Whiting Sc ...

’s Department of Physics and Astronomy and the Whiting School of Engineering’s Department of

Computer Science Computer science is the study of computation, information, and automation. Computer science spans Theoretical computer science, theoretical disciplines (such as algorithms, theory of computation, and information theory) to Applied science, ...

. Through the Bloomberg Distinguished Professorship, Szalay also will be teaching a new undergraduate class in data science, using a synthesis of statistics, computer science, and basic sciences that he thinks “will become the fundamental language used by the next generation of scientists.” Since 2009, Szalay has been the founding director of the Institute for Data Intensive Engineering and Science (IDIES) at Johns Hopkins, an interdisciplinary institute fostering “education and research in applying data-intensive technologies to problems of national interest in physical and biological sciences and engineering.” At the time of its founding, IDIES was the “first interdisciplinary

center of its type ��and has since inspired similar efforts at other universities.” IDIES is supported by the

National Science Foundation The U.S. National Science Foundation (NSF) is an Independent agencies of the United States government#Examples of independent agencies, independent agency of the Federal government of the United States, United States federal government that su ...

NASA The National Aeronautics and Space Administration (NASA ) is an independent agencies of the United States government, independent agency of the federal government of the United States, US federal government responsible for the United States ...

Intel Intel Corporation is an American multinational corporation and technology company headquartered in Santa Clara, California, and Delaware General Corporation Law, incorporated in Delaware. Intel designs, manufactures, and sells computer compo ...

Microsoft Microsoft Corporation is an American multinational corporation and technology company, technology conglomerate headquartered in Redmond, Washington. Founded in 1975, the company became influential in the History of personal computers#The ear ...

Nokia Nokia Corporation is a Finnish multinational corporation, multinational telecommunications industry, telecommunications, technology company, information technology, and consumer electronics corporation, originally established as a pulp mill in 1 ...

Nvidia Nvidia Corporation ( ) is an American multinational corporation and technology company headquartered in Santa Clara, California, and incorporated in Delaware. Founded in 1993 by Jensen Huang (president and CEO), Chris Malachowsky, and Curti ...

, the

Gordon and Betty Moore Foundation The Gordon and Betty Moore Foundation is an American foundation established by Intel co-founder Gordon E. Moore and his wife Betty I. Moore in September 2000 to support scientific discovery, environmental conservation, patient care improvements ...

, and the W. M. Keck Foundation.

Awards and distinctions

In 1990, Szalay was elected to the

Hungarian Academy of Sciences The Hungarian Academy of Sciences ( , MTA) is Hungary’s foremost and most prestigious learned society. Its headquarters are located along the banks of the Danube in Budapest, between Széchenyi rakpart and Akadémia utca. The Academy's primar ...

as a Corresponding Member and awarded the E.W. Fullam Prize of the Dudley Observatory. The following year, he received Hungary's

Széchenyi Prize The Széchenyi Prize (), named after István Széchenyi, is a prize given in Hungary by the state, replacing the former State Prize in 1990 in recognition of those who have made an outstanding contribution to academic life in Hungary. Recipients ...

, which recognizes “those who have made an outstanding contribution to academic life in Hungary.” Szalay was recognized in particular for his “discovery of the large scale (400 million light years) distribution pattern of galaxies.” In 2003, he was elected as a Fellow of the

American Academy of Arts and Sciences The American Academy of Arts and Sciences (The Academy) is one of the oldest learned societies in the United States. It was founded in 1780 during the American Revolution by John Adams, John Hancock, James Bowdoin, Andrew Oliver, and other ...

. In 2004, he received an Alexander Von Humboldt Research Award in Physical Sciences. In 2007, Szalay received the Jim Gray eScience Award in recognition for his “foundational contributions to interdisciplinary advances in the field of astronomy and groundbreaking work with Jim Gray.” The

IEEE Computer Society IEEE Computer Society (commonly known as the Computer Society or CS) is a technical society of the Institute of Electrical and Electronics Engineers (IEEE) dedicated to computing, namely the major areas of hardware, software, standards and people ...

awarded Szalay with the 2015 Sidney Fernbach Award for "his outstanding contributions to the development of data-intensive computing systems and on the application of such systems in many scientific areas including astrophysics, turbulence, and genomics.”. In 2023 he has been elected to the National Academy of Sciences. In 2024, he became a Fellow of the ACM.

Research

Szalay is an astrophysicist who has made significant contribution to our understanding of the

structure formation In physical cosmology, structure formation describes the creation of galaxies, galaxy clusters, and larger structures starting from small fluctuations in mass density resulting from processes that created matter. The universe, as is now known from ...

and on the nature of the

dark matter In astronomy, dark matter is an invisible and hypothetical form of matter that does not interact with light or other electromagnetic radiation. Dark matter is implied by gravity, gravitational effects that cannot be explained by general relat ...

in the

universe The universe is all of space and time and their contents. It comprises all of existence, any fundamental interaction, physical process and physical constant, and therefore all forms of matter and energy, and the structures they form, from s ...

. Distinguished in the area of the

, he works on the

statistical Statistics (from German language, German: ', "description of a State (polity), state, a country") is the discipline that concerns the collection, organization, analysis, interpretation, and presentation of data. In applying statistics to a s ...

measures of the spatial distribution of

galaxies A galaxy is a system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity. The word is derived from the Greek ' (), literally 'milky', a reference to the Milky Way galaxy that contains the Solar Sys ...

and

galaxy formation In cosmology, the study of galaxy formation and evolution is concerned with the processes that formed a Homogeneity and heterogeneity, heterogeneous universe from a Big Bang, homogeneous beginning, the formation of the first galaxies, the way ga ...

. He has contributed much to the field of theoretical astrophysics and large scale structure. Szalay has developed several novel statistical techniques about optimal estimators for galaxy correlations, power spectra,

photometric redshift A photometric redshift is an estimate for the recession velocity of an astronomical object such as a galaxy or quasar, made without measuring its spectrum. The technique uses photometry (that is, the brightness of the object viewed through various ...

s for galaxies, optimal co-adding of multicolor images, PCA-based

spectral classification ''Spectral'' is a 2016 Hungarian-American military science fiction action film co-written and directed by Nic Mathieu. Written with Ian Fried & George Nolfi, the film stars James Badge Dale as DARPA research scientist Mark Clyne, with Max M ...

of galaxies and

Bayesian Thomas Bayes ( ; c. 1701 – 1761) was an English statistician, philosopher, and Presbyterian minister. Bayesian ( or ) may be either any of a range of concepts and approaches that relate to statistical methods based on Bayes' theorem Bayes ...

techniques applied to spatial cross-matching of different astronomical catalogs. He has also led the development of data-intensive computer architectures covering all aspects of this process from design to implementation. Particular accomplishments include: * Biased

in a

cold dark matter In cosmology and physics, cold dark matter (CDM) is a hypothetical type of dark matter. According to the current standard model of cosmology, Lambda-CDM model, approximately 27% of the universe is dark matter and 68% is dark energy, with only a sm ...

dominated universe * Structure formation in a

-dominated universe * Computing the power spectrum in hot, cold and warm

dominated universes (Szalay also defined the terms hot/cold/warm dark matter) * Various measurements of the large scale

galaxy A galaxy is a Physical system, system of stars, stellar remnants, interstellar medium, interstellar gas, cosmic dust, dust, and dark matter bound together by gravity. The word is derived from the Ancient Greek, Greek ' (), literally 'milky', ...

power spectrum In signal processing, the power spectrum S_(f) of a continuous time signal x(t) describes the distribution of Power (physics), power into frequency components f composing that signal. According to Fourier analysis, any physical signal can be ...

Sloan Digital Sky Survey

Professor Szalay is the Architect for the Science Archive and Chair of the Science Council of the

Sloan Digital Sky Survey The Sloan Digital Sky Survey or SDSS is a major multi-spectral imaging and spectroscopic redshift survey using a dedicated 2.5-m wide-angle optical telescope at Apache Point Observatory in New Mexico, United States. The project began in 2000 a ...

, the most used astronomy facility in the world today. He collaborated with Jim Gray to design an efficient system to perform

data mining Data mining is the process of extracting and finding patterns in massive data sets involving methods at the intersection of machine learning, statistics, and database systems. Data mining is an interdisciplinary subfield of computer science and ...

on the SDSS

Terabyte The byte is a unit of digital information that most commonly consists of eight bits. Historically, the byte was the number of bits used to encode a single character of text in a computer and for this reason it is the smallest addressable un ...

sized archive, based on innovative spatial indexing techniques, that represented a “thousand-fold increase in the total amount of data that astronomers have collected to date.” The SDSS Science Archive has attracted an unprecedented number of users, and is considered to be an example for online archives of the future. Currently, he is on the Science Advisory Council of the

Large Synoptic Survey Telescope The Vera C. Rubin Observatory, formerly known as the Large Synoptic Survey Telescope (LSST), is an astronomy, astronomical observatory in Chile. Its main task will be carrying out a synoptic astronomical survey, the Legacy Survey of Space and Tim ...

. A

minor planet According to the International Astronomical Union (IAU), a minor planet is an astronomical object in direct orbit around the Sun that is exclusively classified as neither a planet nor a comet. Before 2006, the IAU officially used the term ''minor ...

discovered by the

Apache Point Observatory The Apache Point Observatory (APO; obs. code: 705) is an astronomical observatory located in the Sacramento Mountains in Sunspot, New Mexico, United States, approximately south of Cloudcroft. The observatory is operated by New Mexico State Un ...

was named 170010 Szalay in his honor.

Virtual observatory and cosmological simulations

Szalay is a leader in the grass-roots standardization effort to bring the next generation

petascale Petascale computing refers to computing systems capable of performing at least 1 quadrillion (10^15) floating-point operations per second (FLOPS). These systems are often called petaflops systems and represent a significant leap from traditional ...

databases in astronomy to a common basis, so that they will be interoperable. In support of this goal, Szalay was Project Director of the National Virtual Observatory. In 2001, Jim Gray and Szalay wrote up a viewpoint article on the national virtual observatory project for ''Science'', entitled "The World-Wide Telescope." He was also one of the founders of the International Virtual Observatory Alliance and part of the core team to build the

Galaxy Zoo Galaxy Zoo is a crowdsourced astronomy project which invites people to assist in the galaxy morphological classification, morphological classification of large numbers of galaxy, galaxies. It is an example of citizen science as it enlists the he ...

, one of the most visible citizen science projects today. Szalay collaborated with Simon White and Gerard Lemson to build a database similar to the SkyServer out of the Millennium Simulation, which became the reference cosmology simulation used by astronomers all over the world. In collaboration with Piero Madau, he is building the 1.2PB database, known as The Milky Way Laboratory, for the Silver River cosmology simulation, currently running at

Oak Ridge National Laboratory Oak Ridge National Laboratory (ORNL) is a federally funded research and development centers, federally funded research and development center in Oak Ridge, Tennessee, United States. Founded in 1943, the laboratory is sponsored by the United Sta ...

Data-intensive computing

Szalay was involved in the early projects related to the

Computational Grid Grid computing is the use of widely distributed computer resources to reach a common goal. A computing grid can be thought of as a distributed system with non-interactive workloads that involve many files. Grid computing is distinguished from c ...

, in particular the GriPhyN and iVDGL projects, creating

testbed A testbed (also spelled test bed) is a platform for conducting rigorous, transparent, and replicable testing of scientific theories, computing tools, and new technologies. The term is used across many disciplines to describe experimental research ...

applications Application may refer to: Mathematics and computing * Application software, computer software designed to help the user to perform specific tasks ** Application layer, an abstraction layer that specifies protocols and interface methods used in a ...

for

high energy physics Particle physics or high-energy physics is the study of fundamental particles and forces that constitute matter and radiation. The field also studies combinations of elementary particles up to the scale of protons and neutrons, while the stu ...

and

astrophysics Astrophysics is a science that employs the methods and principles of physics and chemistry in the study of astronomical objects and phenomena. As one of the founders of the discipline, James Keeler, said, astrophysics "seeks to ascertain the ...

. He has collaborated on high-speed

data analytics Analytics is the systematic computational analysis of data or statistics. It is used for the discovery, interpretation, and communication of meaningful patterns in data, which also falls under and directly relates to the umbrella term, data sci ...

for more than a decade, and has been part of the TeraFlow project since 2004 and the Open Science Grid. He was also heavily involved in the Data Conservancy, researching the long-term curation and preservation of

scientific data Data ( , ) are a collection of discrete or continuous values that convey information, describing the quantity, quality, fact, statistics, other basic units of meaning, or simply sequences of symbols that may be further interpreted formally ...

. He has coauthored several papers with

Gordon Bell Chester Gordon Bell (August 19, 1934 – May 17, 2024) was an American electrical engineer and manager. An early employee of Digital Equipment Corporation (DEC), from 1960–1966, Bell designed several of their PDP machines and later served as ...

, one of the world's premier computer designers, arguing how

Amdahl's law In computer architecture, Amdahl's law (or Amdahl's argument) is a formula that shows how much faster a task can be completed when more resources are added to the system. The law can be stated as: "the overall performance improvement gained by ...

can be used to revisit

architectures from first principles. Applying these ideas, he built a low power system, GrayWulf, using Atom processors with extremely good IO performance per unit power (factor of 15 better than a typical rack server). GrayWulf was named in homage to and builds on the work of Szalay's collaborator legendary Microsoft computer scientist Jim Gray and Beowulf, the “original computer cluster developed at

using ‘off-the-shelf’ computer hardware.” Szalay led the team that won the Supercomputing Data Challenge in SC-08 - the International Conference for High Performance Computing, Networking, Storage and Analysis - with their entry "Storage Challenge GrayWulf: Scalable Clustered Architecture for Data-Intensive Computing." In 2010, Szalay began developing the Data-Scope, a 6.5PB system with 500Gbytes/s sequential throughput, utilizing a uniquely balanced system built out of hard disks, SSDs and GPUs, for maximal data flow across the system. The Data-Scope went online in 2013 and read “data 30 times faster than GrayWulf, making it the fastest data-processing system at any university in the world.” Szalay has more recently branched out in other scientific areas focusing on data-intensive computing. In collaboration with Randal Burns, Charles Meneveau, an
Greg Eyink
he has built the 350TB turbulence database (JHTDB) providing immersive access to a large

computational fluid dynamics Computational fluid dynamics (CFD) is a branch of fluid mechanics that uses numerical analysis and data structures to analyze and solve problems that involve fluid dynamics, fluid flows. Computers are used to perform the calculations required ...

simulation, where users can launch virtual sensors into the simulation that report back their

velocity Velocity is a measurement of speed in a certain direction of motion. It is a fundamental concept in kinematics, the branch of classical mechanics that describes the motion of physical objects. Velocity is a vector (geometry), vector Physical q ...

. A landmark paper using these resources appeared in ''Nature''. With Andreas Terzis and Katalin Szlavecz, he has built an end-to-end wireless sensor system for

in-situ is a Latin phrase meaning 'in place' or 'on site', derived from ' ('in') and ' ( ablative of ''situs'', ). The term typically refers to the examination or occurrence of a process within its original context, without relocation. The term is use ...

monitoring of environmental parameters, including , and measuring the impact of the soil on the

global carbon cycle The carbon cycle is a part of the biogeochemical cycle where carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of Earth. Other major biogeochemical cycles include the nitrogen cycle and the water cycl ...

. With sensors around

Baltimore Baltimore is the most populous city in the U.S. state of Maryland. With a population of 585,708 at the 2020 census and estimated at 568,271 in 2024, it is the 30th-most populous U.S. city. The Baltimore metropolitan area is the 20th-large ...

, Brazil,

Ecuador Ecuador, officially the Republic of Ecuador, is a country in northwestern South America, bordered by Colombia on the north, Peru on the east and south, and the Pacific Ocean on the west. It also includes the Galápagos Province which contain ...

and the

Atacama Desert The Atacama Desert () is a desert plateau located on the Pacific Ocean, Pacific coast of South America, in the north of Chile. Stretching over a strip of land west of the Andes Mountains, it covers an area of , which increases to if the barre ...

Chile Chile, officially the Republic of Chile, is a country in western South America. It is the southernmost country in the world and the closest to Antarctica, stretching along a narrow strip of land between the Andes, Andes Mountains and the Paci ...

, the system has more than 200,000 sensor days of data and several hundred million

data points In statistics, a unit of observation is the unit described by the data that one analyzes. A study may treat groups as a unit of observation with a country as the unit of analysis, drawing conclusions on group characteristics from data collected a ...

. Szalay has also become heavily involved in applying modern data-intensive computational techniques to

genomics Genomics is an interdisciplinary field of molecular biology focusing on the structure, function, evolution, mapping, and editing of genomes. A genome is an organism's complete set of DNA, including all of its genes as well as its hierarchical, ...

, in collaboration with

Steven Salzberg Steven Lloyd Salzberg (born 1960) is an American computational biologist and computer scientist who is a Bloomberg Distinguished Professor of Biomedical Engineering, Computer Science, and Biostatistics at Johns Hopkins University, where he is al ...

, Ben Langmead, Sarah Wheelan, and Richard Wilton. The collaboration has built a new alignment system for

, which is substantially faster than any other system today.

Awards

* 1967 First Prize International Physics Olympiad, Warsaw, Poland * 1991 Szechenyi Prize of the Hungarian Republic *2003 Fellow of the American Academy of Arts and Sciences * 2004 Alexander Von Humboldt Award in Physical Sciences * 2007 Jim Gray Award, Microsoft * 2015 Sidney Fernbach Award * 2015 Highly Cited Researcher, Thomson Reuters * 2016 Outstanding Collaborator Award, Microsoft Research * 2020 Viktor Ambartsumian International Science Prize * 2021 ACM SIGMOD Systems Award (part of the SDSS team) *2021 One of 10 winners of Falling Walls Science Summit, Life Sciences (with Janis Taube) * 2023 Member, the National Academy of Science * 2024 Fellow of the ACM

Publications

He has written over 575 papers in various scientific journals, covering areas from theoretical cosmology to

observational astronomy Observational astronomy is a division of astronomy that is concerned with recording data about the observable universe, in contrast with theoretical astronomy, which is mainly concerned with calculating the measurable implications of physical ...

spatial statistics Spatial statistics is a field of applied statistics dealing with spatial data. It involves stochastic processes (random fields, point processes), sampling, smoothing and interpolation, regional ( areal unit) and lattice ( gridded) data, poin ...

and

computer science Computer science is the study of computation, information, and automation. Computer science spans Theoretical computer science, theoretical disciplines (such as algorithms, theory of computation, and information theory) to Applied science, ...

, and more recently

turbulence In fluid dynamics, turbulence or turbulent flow is fluid motion characterized by chaotic changes in pressure and flow velocity. It is in contrast to laminar flow, which occurs when a fluid flows in parallel layers with no disruption between ...

, environmental science and

. Szalay has more than 63,805 citations in Google Scholar and an h-index of 96.Google Schola
"Author: A.S. Szalay"
''

Google Scholar Google Scholar is a freely accessible web search engine that indexes the full text or metadata of Academic publishing, scholarly literature across an array of publishing formats and disciplines. Released in Beta release, beta in November 2004, th ...

'', 27 July 2015. Retrieved on 27 July 2015. He was among the top 1% most cited in the world for subject field and year of publication in the 2001 and 2014

Thomson Reuters Thomson Reuters Corporation ( ) is a Canadian multinational corporation, multinational content-driven technology Conglomerate (company), conglomerate. The company was founded in Toronto, Ontario, Canada, and maintains its headquarters at 1 ...

Highly Cited Researchers reports. ;Books *1998, Large Scale Structures of the Universe (International Astronomical Union Symposia). with co-editors Jean Audouze & Marie-Christine Pelletan, Springer. ;Highly Cited Articles ''(more than 1300 citations)'' * 2009, with KN Abazajian, JK Adelman-McCarthy, MA Agüeros, SS Allam, and CA Prieto,'' The seventh data release of the Sloan Digital Sky Survey'', in: ''

The Astrophysical Journal Supplement Series ''The Astrophysical Journal'' (''ApJ'') is a peer-reviewed scientific journal of astrophysics and astronomy, established in 1895 by American astronomers George Ellery Hale and James Edward Keeler. The journal discontinued its print edition and ...

''. Vol. 182, nº 2, 543. * 2007, with JK Adelman-McCarthy, MA Agüeros, SS Allam, KSJ Anderson et al., ''The fifth data release of the Sloan Digital Sky Survey'', in: ''The Astrophysical Journal Supplement Series''. Vol. 172, nº 2; 634. *2006, with M Tegmark, DJ Eisenstein, MA Strauss, DH Weinberg, MR Blanton, et al. ''Cosmological constraints from the SDSS luminous red galaxies'', in: ''

Physical Review D Physical may refer to: *Physical examination In a physical examination, medical examination, clinical examination, or medical checkup, a medical practitioner examines a patient for any possible medical signs or symptoms of a Disease, medical co ...

''. Vol. 74, nº 12; 123507. * 2005, with DJ Eisenstein, I Zehavi, DW Hogg, R Scoccimarro, and MR Blanton, ''Detection of the baryon acoustic peak in the large-scale correlation function of SDSS luminous red galaxies'', in: ''

The Astrophysical Journal ''The Astrophysical Journal'' (''ApJ'') is a peer-reviewed scientific journal of astrophysics and astronomy, established in 1895 by American astronomers George Ellery Hale and James Edward Keeler. The journal discontinued its print edition and ...

''. Vol. 633, nº 2; 560. *2004, with M Tegmark, MA Strauss, MR Blanton, K Abazajian, S Dodelson, et el. ''Cosmological parameters from SDSS and WMAP'', in: ''

''. Vol. 69, nº 10. * 2002, with C Stoughton, RH Lupton, M Bernardi, MR Blanton, S Burles, FJ Castander, et al., ''Sloan digital sky survey: early data release'', in: ''

The Astronomical Journal ''The Astronomical Journal'' (often abbreviated ''AJ'' in scientific papers and references) is a peer-reviewed monthly scientific journal owned by the American Astronomical Society (AAS) and currently published by IOP Publishing. It is one of the p ...

''. Vol. 123, nº 1; 485. * 2002, with MA Strauss, DH Weinberg, RH Lupton, VK Narayanan, J Annis, et al. ''Spectroscopic target selection in the Sloan Digital Sky Survey: the main galaxy sample'', in: ''

''. Vol. 124, nº 3; 1810. *2000, with DG York, J Adelman, JE Anderson Jr, SF Anderson, J Annis, NA Bahcall, et al., ''The sloan digital sky survey: Technical summary'', in: ''

''. Vol. 120, nº 3; 1579. *1993, with Stephen D Landy, ''Bias and variance of angular correlation functions'', in: ''The Astrophysical Journal''. Vol. 412; 64–71. *1986, with JM Bardeen, JR Bond, and N Kaiser, ''The statistics of peaks of Gaussian random fields'', in: ''

''. Vol. 304; 15–61.

References

External links

Institute for Data Intensive Engineering and Science

Webpage at Johns Hopkins University Krieger School of Arts & Sciences
{{DEFAULTSORT:Szalay, Alex Johns Hopkins University faculty Living people American astronomers Fellows of the American Academy of Arts and Sciences 1949 births Members of the United States National Academy of Sciences 2023 fellows of the Association for Computing Machinery