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Peter Coles
Peter Coles (born 1963) is a theoretical cosmologist at Maynooth University. He studies the large scale structure of our Universe. He studied for his PhD from 1985 to 1988, subsequently becoming a postdoctoral researcher at Sussex and Queen Mary, subsequently becoming a lecturer there. He was a professor at Cardiff University starting in 2007, and from 2013 he was the head of the School of Mathematical and Physical Sciences at the University of Sussex. In 2017 he started working at Maynooth University, becoming head of the Department of Theoretical Physics in 2019. Early life and education He was born in Newcastle upon Tyne and educated at the Royal Grammar School, Newcastle. He did his first degree at Magdalene College, Cambridge, in Natural Sciences, specialising in Theoretical Physics. In 1985 he started studying for his doctorate at the University of Sussex, supervised by John D. Barrow, and completed his DPhil thesis in 1988. Coles advises LGBT scientists not to worry ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maynooth University
Maynooth University (MU) (), is a constituent university of the National University of Ireland in Maynooth, County Kildare, Ireland. Maynooth University was formerly known as National University of Ireland, Maynooth (NUIM; ). It was Ireland's youngest university until Technological University Dublin was established in 2019, having been founded by the Universities Act, 1997, from the secular faculties of the now separate St Patrick's College, Maynooth, which was founded in 1795. Maynooth is also the only university town in Ireland; all other Irish universities are based in cities. The university consists of two connected campuses: an older southern campus, with 19th-century buildings, shared with St Patrick's College, Maynooth, St Patrick's College, and a modern northern campus, occupying . Over 16,000 students are enrolled in the university, employing over 1,000 staff from over 20 different countries. In 2009, Maynooth University was listed as a Top500 university in the T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gold Open Access
Open access (OA) is a set of principles and a range of practices through which nominally copyrightable publications are delivered to readers free of access charges or other barriers. With open access strictly defined (according to the 2001 definition), or libre open access, barriers to copying or reuse are also reduced or removed by applying an open license for copyright, which regulates post-publication uses of the work. The main focus of the open access movement has been on "peer reviewed research literature", and more specifically on academic journals. This is because: * such publications have been a subject of serials crisis, unlike newspapers, magazines and fiction writing. The main difference between these two groups is in demand elasticity: whereas an English literature curriculum can substitute ''Harry Potter and the Philosopher's Stone'' with a free-domain alternative, such as '' A Voyage to Lilliput,'' an emergency room physician treating a patient for a life-th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Non-Gaussianity
In physics, a non-Gaussianity is the correction that modifies the expected Gaussian function estimate for the measurement of a physical quantity. In physical cosmology, the fluctuations of the cosmic microwave background The cosmic microwave background (CMB, CMBR), or relic radiation, is microwave radiation that fills all space in the observable universe. With a standard optical telescope, the background space between stars and galaxies is almost completely dar ... are known to be approximately Gaussian, both theoretically as well as experimentally. However, most theories predict some level of non-Gaussianity in the primordial density field. Detection of these non-Gaussian signatures will allow discrimination between various models of inflation and their alternatives. References External linksTesting gaussianity, homogeneity and isotropy with the cosmic microwave background Measurement Physical cosmology {{physical-cosmology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetic Field
A magnetic field (sometimes called B-field) is a physical field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field. A permanent magnet's magnetic field pulls on ferromagnetic materials such as iron, and attracts or repels other magnets. In addition, a nonuniform magnetic field exerts minuscule forces on "nonmagnetic" materials by three other magnetic effects: paramagnetism, diamagnetism, and antiferromagnetism, although these forces are usually so small they can only be detected by laboratory equipment. Magnetic fields surround magnetized materials, electric currents, and electric fields varying in time. Since both strength and direction of a magnetic field may vary with location, it is described mathematically by a function (mathematics), function assigning a Euclidean vector, vector to each point of space, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cosmological Models
Physical cosmology is a branch of cosmology concerned with the study of cosmological models. A cosmological model, or simply cosmology, provides a description of the largest-scale structures and dynamics of the universe and allows study of fundamental questions about its origin, structure, evolution, and ultimate fate.For an overview, see Cosmology as a science originated with the Copernican principle, which implies that celestial bodies obey identical physical laws to those on Earth, and Newtonian mechanics, which first allowed those physical laws to be understood. Physical cosmology, as it is now understood, began in 1915 with the development of Albert Einstein's general theory of relativity, followed by major observational discoveries in the 1920s: first, Edwin Hubble discovered that the universe contains a huge number of external galaxies beyond the Milky Way; then, work by Vesto Slipher and others showed that the universe is expanding. These advances made it possible to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galaxy Cluster
A galaxy cluster, or a cluster of galaxies, is a structure that consists of anywhere from hundreds to thousands of galaxies that are bound together by gravity, with typical masses ranging from 1014 to 1015 solar masses. Clusters consist of galaxies, heated gas, and dark matter. They are the second-largest known gravitationally bound structures in the universe after superclusters. They were believed to be the largest known structures in the universe until the 1980s, when superclusters were discovered. Small aggregates of galaxies are referred to as galaxy groups rather than clusters of galaxies. Together, galaxy groups and clusters form superclusters. Basic properties Galaxy clusters typically have the following properties: * They contain 100 to 1,000 galaxies, hot X-ray emitting gas and large amounts of dark matter. Details are described in the "Composition" section. * They have total masses of 1014 to 1015 solar masses. * They typically have diameters from 1 to 5 Mpc ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cosmic Microwave Background
The cosmic microwave background (CMB, CMBR), or relic radiation, is microwave radiation that fills all space in the observable universe. With a standard optical telescope, the background space between stars and galaxies is almost completely dark. However, a sufficiently sensitive radio telescope detects a faint background glow that is almost isotropic, uniform and is not associated with any star, galaxy, or other astronomical object, object. This glow is strongest in the microwave region of the electromagnetic spectrum. The accidental Discovery of cosmic microwave background radiation, discovery of the CMB in 1965 by American radio astronomers Arno Allan Penzias and Robert Woodrow Wilson was the culmination of work initiated in the 1940s. The CMB is landmark evidence of the Big Bang scientific theory, theory for the origin of the universe. In the Big Bang cosmological models, during the earliest periods, the universe was filled with an Opacity (optics), opaque fog of dense, hot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Observable Universe
The observable universe is a Ball (mathematics), spherical region of the universe consisting of all matter that can be observation, observed from Earth; the electromagnetic radiation from these astronomical object, objects has had time to reach the Solar System and Earth since the beginning of the metric expansion of space, cosmological expansion. Assuming the universe is isotropy, isotropic, the distance to the edge of the observable universe is equidistant, the same in every direction. That is, the observable universe is a sphere, spherical region centered on the observer. Every location in the universe has its own observable universe, which may or may not overlap with the one centered on Earth. The word ''observable'' in this sense does not refer to the capability of modern technology to detect light or other information from an object, or whether there is anything to be detected. It refers to the physical limit created by the speed of light itself. No signal can travel faster ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Large-scale Structure Of The Universe
The observable universe is a spherical region of the universe consisting of all matter that can be observed from Earth; the electromagnetic radiation from these objects has had time to reach the Solar System and Earth since the beginning of the cosmological expansion. Assuming the universe is isotropic, the distance to the edge of the observable universe is the same in every direction. That is, the observable universe is a spherical region centered on the observer. Every location in the universe has its own observable universe, which may or may not overlap with the one centered on Earth. The word ''observable'' in this sense does not refer to the capability of modern technology to detect light or other information from an object, or whether there is anything to be detected. It refers to the physical limit created by the speed of light itself. No signal can travel faster than light, hence there is a maximum distance, called the particle horizon, beyond which nothing can be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 world". In 1731, German philosopher Christian Wolff used the term cosmology in Latin (''cosmologia'') to denote a branch of metaphysics that deals with the general nature of the physical world. Religious or mythological cosmology is a body of beliefs based on mythological, religious, and esoteric literature and traditions of creation myths and eschatology. In the science of astronomy, cosmology is concerned with the study of the chronology of the universe. Physical cosmology is the study of the observable universe's origin, its large-scale structures and dynamics, and the ultimate fate of the universe, including the laws of science that govern these areas. It is investigated by scientists, including astronomers and physicists, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cardiff
Cardiff (; ) is the capital city, capital and List of urban areas in the United Kingdom, largest city of Wales. Cardiff had a population of in and forms a Principal areas of Wales, principal area officially known as the City and County of Cardiff (). The city is the List of cities in the United Kingdom, eleventh largest in the United Kingdom. Located in the South East Wales, southeast of Wales and in the Cardiff Capital Region, Cardiff is the county town of the Historic counties of Wales, historic county of Glamorgan and in 1974–1996 of South Glamorgan. It belongs to the Eurocities network of the largest European cities. A small town until the early 19th century, its prominence as a port for coal when mining began in the region helped its expansion. In 1905, it was ranked as a city and in 1955 proclaimed capital of Wales. The Cardiff urban area covers a larger area outside the county boundary, including the towns of Dinas Powys and Penarth. Cardiff is the main commercial ce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bethnal Green
Bethnal Green is an area in London, England, and is located in the London Borough of Tower Hamlets. It is in east London and part of the East End of London, East End. The area emerged from the small settlement which developed around the common land, Green, much of which survives today as Bethnal Green Gardens, beside Cambridge Heath Road. By the 16th century the term applied to a wider rural area, the ''Hamlet of Bethnal Green'', which subsequently became a Parish, then a Metropolitan Borough of Bethnal Green, Metropolitan Borough before merging with neighbouring areas to become the north-western part of the new Tower Hamlets. Economic focus shifted from mainstream farming produce for the City of London – through highly perishable goods production (market gardening), weaving, dock and building work and light industry – to a high proportion of commuters to city businesses, public sector/care sector roles, construction, courier businesses and home-working digital and cre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
