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Tom Abel
Tom Abel (born 1970) is a German cosmologist who first simulated the collapse of a metal-free massive star that belongs to the first generation of stars in the Universe. This work was done in collaboration with Greg L. Bryan and Michael L. Norman and was published in ''Science magazine'(2002, 295, 93) He received his Doctor of Philosophy from Ludwig Maximilian University of Munich in 2000. He is a Professor of Physics at Stanford University in Palo Alto, California and of Particle Physics and Astrophysics at SLAC National Accelerator Laboratory and from 2013 to 2018 served as Director of the Kavli Institute for Particle Astrophysics and Cosmology. His work with visualization expert Ralf Kaehler has been seen in many planetaria shows including "The Dark Universe" (2013) Background Abel was born in rural Lower Bavaria, Germany. Work His primary interests are: * Primordial star formation * Cosmological structure formation and reionization * Astrophysical fluid dynamics * Ra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physical Cosmology
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 Cosmogony, origin, structure, Chronology of the universe, evolution, and ultimate fate.For an overview, see Cosmology as a science originated with the Copernican principle, which implies that astronomical object, 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 with the development in 1915 of Albert Einstein's general relativity, 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 Galaxy, galaxies beyond the Milky Way; then, work by Vesto Sli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lower Bavaria
Lower Bavaria (german: Niederbayern, Bavarian: ''Niedabayern'') is one of the seven administrative regions of Bavaria, Germany, located in the east of the state. Geography Lower Bavaria is subdivided into two regions () – Landshut and Donau-Wald. Recent election results mark it as the most conservative part of Germany, generally giving huge margins to the CSU. This part of Bavaria includes the Bavarian Forest, a well-known tourist destination in Germany, and the Lower Bavarian Upland. ''Landkreise''(districts) # Deggendorf # Dingolfing-Landau # Freyung-Grafenau # Kelheim # Landshut # Passau # Regen # Rottal-Inn # Straubing-Bogen ''Kreisfreie Städte''(district-free towns) # Landshut # Passau # Straubing Population Economy The Gross domestic product (GDP) of the region was 48.5 billion € in 2018, accounting for 1.4% of German economic output. GDP per capita adjusted for purchasing power was 36,100 € or 120% of the EU27 average in the same year. The GDP per empl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1970 Births
Events January * January 1 – Unix time epoch reached at 00:00:00 UTC. * January 5 – The 7.1 Tonghai earthquake shakes Tonghai County, Yunnan province, China, with a maximum Mercalli intensity of X (''Extreme''). Between 10,000 and 14,621 were killed and 26,783 were injured. * January 14 – Biafra capitulates, ending the Nigerian Civil War. * January 15 – After a 32-month fight for independence from Nigeria, Biafran forces under Philip Effiong formally surrender to General Yakubu Gowon. February * February 1 – The Benavídez rail disaster near Buenos Aires, Argentina, kills 236. * February 10 – An avalanche at Val-d'Isère, France, kills 41 tourists. * February 11 – '' Ohsumi'', Japan's first satellite, is launched on a Lambda-4 rocket. * February 22 – Guyana becomes a Republic within the Commonwealth of Nations. March * March 1 – Rhodesia severs its last tie with the United Kingdom, declaring itself a republic. * March 4 — All 57 m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stanford University Department Of Physics Faculty
Stanford University, officially Leland Stanford Junior University, is a private research university in Stanford, California. The campus occupies , among the largest in the United States, and enrolls over 17,000 students. Stanford is considered among the most prestigious universities in the world. Stanford was founded in 1885 by Leland and Jane Stanford in memory of their only child, Leland Stanford Jr., who had died of typhoid fever at age 15 the previous year. Leland Stanford was a U.S. senator and former governor of California who made his fortune as a railroad tycoon. The school admitted its first students on October 1, 1891, as a coeducational and non-denominational institution. Stanford University struggled financially after the death of Leland Stanford in 1893 and again after much of the campus was damaged by the 1906 San Francisco earthquake. Following World War II, provost of Stanford Frederick Terman inspired and supported faculty and graduates' entrepreneurialism t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ludwig Maximilian University Of Munich Alumni
Ludwig may refer to: People and fictional characters * Ludwig (given name), including a list of people and fictional characters * Ludwig (surname), including a list of people * Ludwig Ahgren, or simply Ludwig, American YouTube live streamer and content creator Arts and entertainment * ''Ludwig'' (cartoon), a 1977 animated children's series * ''Ludwig'' (film), a 1973 film by Luchino Visconti about Ludwig II of Bavaria * '' Ludwig: Requiem for a Virgin King'', a 1972 film by Hans-Jürgen Syberberg about Ludwig II of Bavaria * "Ludwig", a 1967 song by Al Hirt Other uses * Ludwig (crater), a small lunar impact crater just beyond the eastern limb of the Moon * Ludwig, Missouri, an unincorporated community in the United States * Ludwig Canal, an abandoned canal in southern Germany * Ludwig Drums, an American manufacturer of musical instruments * ''Ludwig'' (ship), a steamer that sank in 1861 after a collision with the '' Stadt Zürich'' See also * Ludewig * Ludvig * Ludwik ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
21st-century American Astronomers
The 1st century was the century spanning AD 1 ( I) through AD 100 ( C) according to the Julian calendar. It is often written as the or to distinguish it from the 1st century BC (or BCE) which preceded it. The 1st century is considered part of the Classical era, epoch, or historical period. The 1st century also saw the appearance of Christianity. During this period, Europe, North Africa and the Near East fell under increasing domination by the Roman Empire, which continued expanding, most notably conquering Britain under the emperor Claudius (AD 43). The reforms introduced by Augustus during his long reign stabilized the empire after the turmoil of the previous century's civil wars. Later in the century the Julio-Claudian dynasty, which had been founded by Augustus, came to an end with the suicide of Nero in AD 68. There followed the famous Year of Four Emperors, a brief period of civil war and instability, which was finally brought to an end by Vespasian, ninth Roman emperor, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Cosmologists
American(s) may refer to: * American, something of, from, or related to the United States of America, commonly known as the "United States" or "America" ** Americans, citizens and nationals of the United States of America ** American ancestry, people who self-identify their ancestry as "American" ** American English, the set of varieties of the English language native to the United States ** Native Americans in the United States, indigenous peoples of the United States * American, something of, from, or related to the Americas, also known as "America" ** Indigenous peoples of the Americas * American (word), for analysis and history of the meanings in various contexts Organizations * American Airlines, U.S.-based airline headquartered in Fort Worth, Texas * American Athletic Conference, an American college athletic conference * American Recordings (record label), a record label previously known as Def American * American University, in Washington, D.C. Sports teams Soccer * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radiative Transfer
Radiative transfer is the physical phenomenon of energy transfer in the form of electromagnetic radiation. The propagation of radiation through a medium is affected by absorption, emission, and scattering processes. The equation of radiative transfer describes these interactions mathematically. Equations of radiative transfer have application in a wide variety of subjects including optics, astrophysics, atmospheric science, and remote sensing. Analytic solutions to the radiative transfer equation (RTE) exist for simple cases but for more realistic media, with complex multiple scattering effects, numerical methods are required. The present article is largely focused on the condition of radiative equilibrium. Definitions The fundamental quantity that describes a field of radiation is called spectral radiance in radiometric terms (in other fields it is often called specific intensity). For a very small area element in the radiation field, there can be electromagnetic radiat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fluid Dynamics
In physics and engineering, fluid dynamics is a subdiscipline of fluid mechanics that describes the flow of fluids— liquids and gases. It has several subdisciplines, including ''aerodynamics'' (the study of air and other gases in motion) and hydrodynamics (the study of liquids in motion). Fluid dynamics has a wide range of applications, including calculating forces and moments on aircraft, determining the mass flow rate of petroleum through pipelines, predicting weather patterns, understanding nebulae in interstellar space and modelling fission weapon detonation. Fluid dynamics offers a systematic structure—which underlies these practical disciplines—that embraces empirical and semi-empirical laws derived from flow measurement and used to solve practical problems. The solution to a fluid dynamics problem typically involves the calculation of various properties of the fluid, such as flow velocity, pressure, density, and temperature, as functions of space and time. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reionization
In the fields of Big Bang theory and cosmology, reionization is the process that caused matter in the universe to reionize after the lapse of the " dark ages". Reionization is the second of two major phase transitions of gas in the universe (the first is recombination). While the majority of baryonic matter in the universe is in the form of hydrogen and helium, reionization usually refers strictly to the reionization of hydrogen, the element. It is believed that the primordial helium also experienced the same phase of reionization changes, but at different points in the history of the universe. This is usually referred to as helium reionization. Background The first phase change of hydrogen in the universe was recombination, which occurred at a redshift ''z'' = 1089 (379,000 years after the Big Bang), due to the cooling of the universe to the point where the rate of recombination of electrons and protons to form neutral hydrogen was higher than the reionizatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Star Formation
Star formation is the process by which dense regions within molecular clouds in The "medium" is present further soon.-->interstellar space, sometimes referred to as "stellar nurseries" or "-forming regions", and form s. As a branch of , star formation includes the study of the |
Kavli Institute For Particle Astrophysics And Cosmology
The Kavli Institute for Particle Astrophysics and Cosmology (KIPAC) is an independent joint laboratory of Stanford University and the SLAC National Accelerator Laboratory, founded in 2003 by a gift by Fred Kavli and The Kavli Foundation. It is housed on the grounds of the SLAC National Accelerator Laboratory, as well as on the main Stanford campus. Roger Blandford was the director from 2003 until 2013, and Steven Kahn was the initial deputy director. Tom Abel was appointed acting director in 2013, and director in 2015. In 2018, Risa Wechsler Risa H. Wechsler is an American physicist and Professor of Physics at Stanford University and of Particle Physics and Astrophysics at SLAC National Accelerator Laboratory. She is the director of the Kavli Institute for Particle Astrophysics and C ... took the position of KIPAC's director. Bruce Macintosh is the deputy director. External links * Kavli Foundation {{Coord, 37.42818, -122.1726, type:edu_globe:earth_region:US-CA, display=ti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
