Brian Tinsley is a physicist whose wife made fundamental contributions to the astronomical understanding of how galaxies what?
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Brian Tinsley Brian Tinsley is a physicist who for more than 50 years has been actively researching Aeronomy. He has been a Professor of Physics at the University of Texas at Dallas since 1976 and has served many national and international scientific organizations. He obtained his PhD from the University of Canterbury in New Zealand in November, 1963, for research on optical emissions from the upper atmosphere (airglow and aurorae). With his wife, Beatrice Tinsley, he came to Dallas to work at the newly formed Southwest Center for Advanced Studies, which became the University of Texas at Dallas in 1969. Beatrice obtained a Ph.D. in astrophysics at the University of Texas at Austin, and became a prominent astrophysicist before she died in 1981, resulting in the University of Texas at Austin creating the endowed professorship that bears her name.
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Beatrice Tinsley Beatrice Muriel Hill Tinsley (27 January 1941 – 23 March 1981) was a British-born New Zealand astronomer and cosmologist whose research made fundamental contributions to the astronomical understanding of how galaxies evolve, grow and die.
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Denis Weaire Denis Lawrence Weaire FRS (born 17 October 1942) is an Irish physicist and an emeritus professor of Trinity College, Dublin.
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Sigma (cosmology) Sigma in cosmology was a property of galaxies used when trying to work out the mystery of galaxies and their supermassive black holes.
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Diffusion damping In modern cosmological theory, diffusion damping, also called photon diffusion damping, is a physical process which reduced density inequalities (anisotropies) in the early universe, making the universe itself and the cosmic microwave background radiation (CMB) more uniform. Around 300,000 years after the Big Bang, during the epoch of "recombination", diffusing photons travelled from hot regions of space to cold ones, equalising the temperatures of these regions. This effect is responsible, along with baryon acoustic oscillations, the Doppler effect, and the effects of gravity on electromagnetic radiation, for the eventual formation of galaxies and galaxy clusters, these being the dominant large scale structures which are observed in the universe. It is a damping "by" diffusion, not "of" diffusion.
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Dark galaxy A dark galaxy is a hypothesized galaxy with no, or very few, stars. They received their name because they have no visible stars, but may be detectable if they contain significant amounts of gas. Astronomers have long theorized the existence of dark galaxies, but there are no confirmed examples to date. Dark galaxies are distinct from intergalactic gas clouds caused by galactic tidal interactions, since these gas clouds do not contain dark matter, so they do not technically qualify as galaxies. Distinguishing between intergalactic gas clouds and galaxies is difficult; most candidate dark galaxies turn out to be tidal gas clouds. The best candidate dark galaxies to date include HI1225+01, AGC229385, and numerous gas clouds detected in studies of quasars.
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Hakkı Boran Ögelman Hakkı Boran Ögelman (July 8, 1940 – September 4, 2011) was a Turkish physicist and astrophysicist. He was an expert on gamma ray astronomy, the physics of neutron stars, and solar energy and worked on several key topics in modern astrophysics. He made many contributions to high energy astrophysics. In his early professional career he engaged in the SAS-II Small Gamma Ray Astronomy Satellite experiment development, data analysis, and first detection and imaging of our universe in gamma rays with his NASA colleagues, as well as in other fields of physics. His main interests in the field of astrophysics were the study of gamma ray astronomy and compact objects such as neutron stars and pulsars. Ögelman worked at NASA Goddard Space Flight Center, Middle East Technical University (METU) in Ankara, Turkey, Cukurova University in Adana, Turkey, Max Planck Institute (MPI) at Garching, Germany and the University of Wisconsin.
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Martin Ryle Sir Martin Ryle FRS (27 September 1918 – 14 October 1984) was an English radio astronomer who developed revolutionary radio telescope systems (see e.g. aperture synthesis) and used them for accurate location and imaging of weak radio sources. In 1946 Ryle and Vonberg were the first people to publish interferometric astronomical measurements at radio wavelengths, although Joseph Pawsey from the University of Sydney claimed to have actually made interferometric measurements earlier in the same year. With improved equipment, Ryle observed the most distant known galaxies in the universe at that time. He was the first Professor of Radio Astronomy at the University of Cambridge, and founding director of the Mullard Radio Astronomy Observatory. He was Astronomer Royal from 1972 to 1982. Ryle and Antony Hewish shared the Nobel Prize for Physics in 1974, the first Nobel prize awarded in recognition of astronomical research.
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Big Bang nucleosynthesis In physical cosmology, Big Bang nucleosynthesis (abbreviated BBN, also known as primordial nucleosynthesis, arch(a)eonucleosynthesis, archonucleosynthesis, protonucleosynthesis and pal(a)eonucleosynthesis) refers to the production of nuclei other than those of the lightest isotope of hydrogen (hydrogen-1, H, having a single proton as a nucleus) during the early phases of the Universe. Primordial nucleosynthesis is believed by most cosmologists to have taken place in the interval from roughly 10 seconds to 20 minutes after the Big Bang, and is calculated to be responsible for the formation of most of the universe's helium as the isotope helium-4 (He), along with small amounts of the hydrogen isotope deuterium (H or D), the helium isotope helium-3 (He), and a very small amount of the lithium isotope lithium-7 (Li). In addition to these stable nuclei, two unstable or radioactive isotopes were also produced: the heavy hydrogen isotope tritium (H or T); and the beryllium isotope beryllium-7 (Be); but these unstable isotopes later decayed into He and Li, as above.
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Chris Lintott Christopher John "Chris" Lintott (born 26 November 1980) is a Professor of Astrophysics in the Department of Physics at Oxford University. Lintott is involved in a number of popular science projects aimed at bringing astronomy to a wider audience. He is the primary presenter of the BBC series "The Sky at Night", having previously been co-presenter with Sir Patrick Moore until Moore's death in 2012. Lintott co-authored "Bang! – The Complete History of the Universe" with Patrick Moore and Queen guitarist and astrophysicist Brian May.
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Bernard Pagel Bernard Ephraim Julius Pagel FRS (4 January 1930 – 14 July 2007) was a British astrophysicist who worked on the measurement and interpretation of elemental abundances in stars and galaxies.
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Margaret Turnbull Margaret Carol Turnbull is an American astronomer. She received her PhD in Astronomy from the University of Arizona in 2004. Turnbull is an authority on star systems which may have habitable planets, solar twins and planetary habitability.
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Fiorella Terenzi Fiorella Terenzi is an Italian-born astrophysicist, author and recording artist who is best known for taking recordings of radio waves from far-away galaxies and turning them into music. She received her doctorate from the University of Milan but is currently based in the United States.
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Vera Rubin Vera Cooper Rubin (July 23, 1928 – December 25, 2016) was an American astronomer who pioneered work on galaxy rotation rates. She uncovered the discrepancy between the predicted angular motion of galaxies and the observed motion, by studying galactic rotation curves. This phenomenon became known as the galaxy rotation problem, and was evidence of the existence of dark matter. Although initially met with skepticism, Rubin's results were confirmed over subsequent decades. Her legacy was described by "The New York Times" as "ushering in a Copernican-scale change" in cosmological theory.
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Wonders of the Universe (book) Wonders of the Universe is a 2011 book by the theoretical physicists Brian Cox and Andrew Cohen. The book is about cosmology and the universe, and is explained in a way that is accessible to a general reader. The book is based on a series with the same name "Wonders of the Universe".
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Winston H. Bostick Winston H. Bostick (March 5, 1916 – January 19, 1991) was an American physicist who discovered plasmoids, plasma focus, and plasma vortex phenomena. He simulated cosmical astrophysics with laboratory plasma experiments, and showed that Hubble expansion can be produced with repulsive mutual induction between neighboring galaxies acting as homopolar generators. His work on plasmas provided evidence for finite-sized elementary particles and the composition of strings, but this is not accepted by mainstream science.
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Scott Hensley Scott Hensley from the Jet Propulsion Laboratory, Pasadena, CA was named Fellow of the Institute of Electrical and Electronics Engineers (IEEE) in 2014 "for contributions to radar remote sensing of the Earth and planetary bodies and advancement of interferometric synthetic aperture radar".
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List of cosmological computation software The cosmic microwave background (CMB) is the thermal radiation assumed to be left over from the "Big Bang" of cosmology. The CMB is a snapshot of the oldest light in our universe, imprinted on the sky when the universe was just 380,000 years old. It shows tiny temperature fluctuations that correspond to regions of slightly different densities, representing the seeds of all future structure: the stars and galaxies of today. Therefore, analysis of the small anisotropies in the CMB helps us to understand the origin and the fate of our universe. In past few decades, there has been a lot of improvement in the observations and several experiments, performed to understand the basic structure of the universe. For analyzing data of different cosmological experiments and for understanding the theoretical nature of the universe many advanced methods and computing software are developed in and used by Cosmologists for years. These software are widely used by the cosmologists across the globe.
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Particle physics in cosmology Particle physics, which deals with the interactions of elementary particles at high energies, is an important component of cosmological models of the early universe, when the universe was dominated by radiation and its average energy density was very high. Because of this, pair production, scattering processes and decay of unstable particles are important in cosmology, and the interface between particle physics and cosmology is sometimes referred to as particle cosmology.
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Pocket universe A pocket universe is a concept in inflationary theory, proposed by Alan Guth. It defines a realm like the one that contains the observable universe as only one of many inflationary zones.
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Low-surface-brightness galaxy A low-surface-brightness galaxy, or LSB galaxy, is a diffuse galaxy with a surface brightness that, when viewed from Earth, is at least one magnitude lower than the ambient night sky.
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Sheila Tinney Sheila Christina Tinney ("née" Power, 15 January 1918 – 27 March 2010) was an Irish mathematical physicist. Her 1941 PhD from the University of Edinburgh, completed under the supervision of Max Born in just two years, is believed to make her the first Irish-born and -raised woman to receive a doctorate in the mathematical sciences.