Alex Szalay is a Bloomberg Distinguished Professor of physics and astronomy and computer science at the

Johns Hopkins University School of Arts and Sciences The Zanvyl Krieger School of Arts & Sciences is an academic division of the Johns Hopkins University, a private research university in Baltimore, Maryland. The school is located on the university's Homewood campus. It is the core of Johns Hopkin ...

and

Whiting School of Engineering The G.W.C. Whiting School of Engineering is the engineering college of the Johns Hopkins University, a private research university in Baltimore, Maryland. History Engineering at Johns Hopkins was originally created in 1913 as an educational p ...

.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 phenomena. It uses mathematics, physics, and chemistry in order to explain their origin and evolution. Objects of interest include planets, moons, stars, nebulae, g ...

cosmology Cosmology () is a branch of physics and metaphysics dealing with the nature of the universe. The term ''cosmology'' was first used in English in 1656 in Thomas Blount's ''Glossographia'', and in 1731 taken up in Latin by German philosopher ...

, the science of big data, and data‐intensive computing.

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 a fermion (an elementary particle with spin of ) that interacts only via the weak interaction and gravity. The neutrino is so named because it is electrically neutral and because its rest mass ...

s. Szalay graduated with a Bachelor of Science degree in

Physics Physics is the natural science that studies matter, its 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 which r ...

in 1969 from Kossuth University, now

University of Debrecen ThUniversity of Debrecen( hu, Debreceni Egyetem) 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 by Suleiman the Magnificent f ...

, 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 natural phenomena. This is in contrast to experimental physics, which uses experim ...

1972 and a

Ph.D A Doctor of Philosophy (PhD, Ph.D., or DPhil; Latin: or ') is the most common degree at the highest academic level awarded following a course of study. PhDs are awarded for programs across the whole breadth of academic fields. Because it is ...

in Astrophysics in 1975 from the Eötvös Loránd University in Budapest. During this period, from 1974 to 1982, Szalay also played guitar in the Hungarian rock band

Panta Rhei (band) Panta Rhei were a Hungarian rock band, known for their progressive rock recordings and adaptations of classical music, for which they created synthesizers, such as the Muzix81 system. The band name refers to the philosophy of Heraclitus. History ...

. 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 land-grant research university in Berkeley, California. Established in 1868 as the University of California, it is the state's first land-grant u ...

University of Chicago The University of Chicago (UChicago, Chicago, U of C, or UChi) is a private university, private research university in Chicago, Illinois. Its main campus is located in Chicago's Hyde Park, Chicago, Hyde Park neighborhood. The University of Chic ...

, and

Fermilab Fermi National Accelerator Laboratory (Fermilab), located just outside Batavia, Illinois, near Chicago, is a United States Department of Energy national laboratory specializing in high-energy particle physics. Since 2007, Fermilab has been opera ...

, before accepting an assistant professorship at Eötvös Loránd University in 1982. After rising to the rank of full professor at Eötvös, he joined

Johns Hopkins University Johns Hopkins University (Johns Hopkins, Hopkins, or JHU) is a private research university in Baltimore, Maryland. Founded in 1876, Johns Hopkins is the oldest research university in the United States and in the western hemisphere. It consi ...

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 Eötvös Loránd University. 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. Szalay holds joint appointments in the

Zanvyl Krieger School of Arts and Sciences The Zanvyl Krieger School of Arts & Sciences is an academic division of the Johns Hopkins University, a private research university in Baltimore, Maryland. The school is located on the university's Homewood campus. It is the core of Johns Hopkin ...

’s Department of Physics and Astronomy and the

’s Department of

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

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

National Science Foundation The National Science Foundation (NSF) is an independent agency of the United States government that supports fundamental research and education in all the non-medical fields of science and engineering. Its medical counterpart is the National ...

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

Intel Intel Corporation is an American multinational corporation and technology company headquartered in Santa Clara, California. It is the world's largest semiconductor chip manufacturer by revenue, and is one of the developers of the x86 seri ...

Microsoft Microsoft Corporation is an American multinational technology corporation producing computer software, consumer electronics, personal computers, and related services headquartered at the Microsoft Redmond campus located in Redmond, Washin ...

Nokia Nokia Corporation (natively Nokia Oyj, referred to as Nokia) is a Finnish multinational telecommunications, information technology, and consumer electronics corporation, established in 1865. Nokia's main headquarters are in Espoo, Finland, i ...

Nvidia Nvidia CorporationOfficially written as NVIDIA and stylized in its logo as VIDIA with the lowercase "n" the same height as the uppercase "VIDIA"; formerly stylized as VIDIA with a large italicized lowercase "n" on products from the mid 1990s to ...

, 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 a ...

, and the W. M. Keck Foundation.

Awards and distinctions

In 1990, Szalay was elected to the Hungarian Academy of Sciences 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 ( hu, Széchenyi-díj), 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 Hu ...

, 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 (abbreviation: AAA&S) 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, a ...

. 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 The Institute of Electrical and Electronics Engineers (IEEE) is a 501(c)(3) professional association for electronic engineering and electrical engineering (and associated disciplines) with its corporate office in New York City and its operation ...

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.”

Research

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

structure formation In physical cosmology, structure formation is the formation of galaxies, galaxy clusters and larger structures from small early density fluctuations. The universe, as is now known from observations of the cosmic microwave background radiation, beg ...

and on the nature of the

dark matter Dark matter is a hypothetical form of matter thought to account for approximately 85% of the matter in the universe. Dark matter is called "dark" because it does not appear to interact with the electromagnetic field, which means it does not a ...

in the

universe The universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy. The Big Bang theory is the prevailing cosmological description of the development of the universe. ...

. Distinguished in the area of the

, he works on the statistical measures of the spatial distribution of galaxies and

galaxy formation The study of galaxy formation and evolution is concerned with the processes that formed a heterogeneous universe from a homogeneous beginning, the formation of the first galaxies, the way galaxies change over time, and the processes that have ge ...

. He has contributed much to the field of

theoretical 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 said, Astrophysics "seeks to ascertain the nature of the hea ...

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 In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the ...

of galaxies and

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

techniques applied to spatial cross-matching of different astronomical catalogs. He has also led the development of data-intensive

computer architecture In computer engineering, computer architecture is a description of the structure of a computer system made from component parts. It can sometimes be a high-level description that ignores details of the implementation. At a more detailed level, the ...

s covering all aspects of this process from design to implementation. Particular accomplishments include: * Biased

in a cold dark matter 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

power spectrum The power spectrum S_(f) of a time series x(t) describes the distribution of power into frequency components composing that signal. According to Fourier analysis, any physical signal can be decomposed into a number of discrete frequencies, ...

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

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, previously referred to as the Large Synoptic Survey Telescope (LSST), is an astronomical observatory currently under construction in Chile. Its main task will be carrying out a synoptic astronomical survey, the Le ...

. 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 ''mino ...

discovered by the Sloan Digital Sky Survey at

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 calculating at least 1015 floating point operations per second (1 petaFLOPS). Petascale computing allowed faster processing of traditional supercomputer applications. The first system ...

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 morphological classification of large numbers of galaxies. It is an example of citizen science as it enlists the help of members of the public to help in scien ...

, one of the most visible citizen science projects today. Szalay collaborated with

Simon White Simon David Manton White (born 30 September 1951), FRS, is a British astrophysicist. He was one of directors at the Max Planck Institute for Astrophysics before his retirement in late 2019. Life White studied Mathematics at Jesus College, C ...

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 U.S. multiprogram science and technology national laboratory sponsored by the U.S. Department of Energy (DOE) and administered, managed, and operated by UT–Battelle as a federally funded research an ...

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 co ...

, 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, computational tools, and new technologies. The term is used across many disciplines to describe experimental rese ...

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 c ...

for

high energy physics Particle physics or high energy physics is the study of Elementary particle, fundamental particles and fundamental interaction, forces that constitute matter and radiation. The fundamental particles in the universe are classified in the Standa ...

and astrophysics. 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. It also entails applying data patterns toward effective decision-making. It ...

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 In the pursuit of knowledge, data (; ) is a collection of discrete values that convey information, describing quantity, quality, fact, statistics, other basic units of meaning, or simply sequences of symbols that may be further interpr ...

. He has coauthored several papers with

Gordon Bell Chester Gordon Bell (born August 19, 1934) is an American electrical engineer and manager. An early employee of Digital Equipment Corporation (DEC) 1960–1966, Bell designed several of their PDP machines and later became Vice President of Engi ...

, 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 which gives the theoretical speedup in latency of the execution of a task at fixed workload that can be expected of a system whose resources are improved. It states tha ...

can be used to revisit

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 which ...

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 flows. Computers are used to perform the calculations required to simulate ...

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

velocity Velocity is the directional speed of an object in motion as an indication of its rate of change in position as observed from a particular frame of reference and as measured by a particular standard of time (e.g. northbound). Velocity i ...

. 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 monitoring of environmental parameters, including , and measuring the impact of the soil on the global carbon cycle. With sensors around

Baltimore Baltimore ( , locally: or ) is the List of municipalities in Maryland, most populous city in the U.S. state of Maryland, fourth most populous city in the Mid-Atlantic (United States), Mid-Atlantic, and List of United States cities by popula ...

, Brazil,

Ecuador Ecuador ( ; ; Quechua: ''Ikwayur''; Shuar: ''Ecuador'' or ''Ekuatur''), officially the Republic of Ecuador ( es, República del Ecuador, which literally translates as "Republic of the Equator"; Quechua: ''Ikwadur Ripuwlika''; Shuar: ' ...

and the

Atacama Desert The Atacama Desert ( es, Desierto de Atacama) is a desert plateau in South America covering a 1,600 km (990 mi) strip of land on the Pacific coast, west of the Andes Mountains. The Atacama Desert is the driest nonpolar desert in th ...

Chile Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east a ...

, 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 at ...

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

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

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 analysis or spatial statistics includes any of the formal techniques which studies entities using their topological, geometric, or geographic properties. Spatial analysis includes a variety of techniques, many still in their early dev ...

and

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

, 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 a laminar flow, which occurs when a fluid flows in parallel layers, with no disruption between ...

, environmental science and genomics. 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 scholarly literature across an array of publishing formats and disciplines. Released in beta in November 2004, the Google Scholar index includes ...

'', 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 media conglomerate. The company was founded in Toronto, Ontario, Canada, where it is headquartered at the Bay Adelaide Centre. Thomson Reuters was created by the Thomson Corpora ...

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'', often abbreviated ''ApJ'' (pronounced "ap jay") in references and speech, is a peer-reviewed scientific journal of astrophysics and astronomy, established in 1895 by American astronomers George Ellery Hale 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, or clinical examination, a medical practitioner examines a patient for any possible medical signs or symptoms of a medical condition. It generally 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'', often abbreviated ''ApJ'' (pronounced "ap jay") in references and speech, is a peer-reviewed scientific journal of astrophysics and astronomy, established in 1895 by American astronomers George Ellery Hale 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 th ...

''. 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