Victor Aleksandrovich Brumberg | |
---|---|
Born | |
Nationality | Russian/American |
Alma mater | Moscow State University Institute of Theoretical Astronomy of Russian Academy of Sciences |
Awards | USSR State Prize, 1982 Humboldt research award, 1993 Title Honorary Scientist of Russia (by a decree of the President of Russia), 1999 Brouwer Award, 2008 |
Scientific career | |
Fields | Physicist |
Institutions | Institute of Theoretical Astronomy of Russian Academy of Sciences, 1958-1987 Institute of Applied Astronomy of Russian Academy of Sciences, 1987-2004 |
Victor A. Brumberg (born February 12, 1933) is a Russian theoretical physicist specializing in relativistic celestial mechanics and astrometry. He worked as a chief-scientist at the Institute of Applied Astronomy, Russian Academy of Sciences, St. Petersburg. He is noted for his work on general relativity applied to celestial mechanics and ephemerides. He is currently living in the United States of America.
Brumberg has served on the scientific committees for projects under the IAU Commission 4: Ephemerides, Commission 7: Celestial Mechanics & Dynamical Astronomy (President), Commission 31: Time, and Commission 52: Relativity in Fundamental Astronomy. [1] He is also a member of the Academy of Europe. Until 2005, he served as Assistant Editor of the Celestial Mechanics and Dynamical Astronomy Journal. He held visiting positions at the Observatoire de Paris (1991), National Astronomy Observatory of Japan (1992-1993), Tuebingen Technical University (1993-1994), Bureau des Longitudes, and Darmstadt Technical University (2000). [2]
Brumberg has over 100 publications and 6 books, two of which are the highly influential Essential Relativistic Celestial Mechanics (1991) and Analytic Techniques of Celestial Mechanics (1995). [3]
He received the 2008 Brouwer Award from the Division of Dynamic Astronomy of the American Astronomical Society. The Brouwer Award was established to recognize outstanding contributions to the field of Dynamical Astronomy, including celestial mechanics, astrometry, geophysics, stellar systems, galactic and extragalactic dynamics. [3] In 1993, he was visiting professor at the Technische Universität Darmstadt. [4]
One major contribution to the three body problem was Brumberg's construction of a series of polynomials converging for any real time moment. Brumberg also worked on the theory of special functions of celestial mechanics and perturbation theory, constructing compact analytic theories in purely trigonometric forms. [5]
Brumberg's main contribution was in the formation, development, and use of the general theory of relativity in celestial mechanics. He was the leading developer of methods for recording relativistic effects in the motion of celestial bodies, the propagation of light, and in optical and radio observations. He showed that the relationship between calculated and observed quantities is independent on the choice of coordinates as long as the calculations and observations are with respect to the same coordinate system. Brumberg was also one of the creators of a unified relativistic theory of the motion of planets, a necessary step for the generation of Russian experiments in space. He received the USSR State Prize for this work. In 1994-1997, Brumberg led a group of the IAU that discovered inaccuracies in the IAU resolutions of 1991, and subsequently recommended more accurate implementations of relativistic report systems that were approved in 1997. [5]
Brumberg advised 4 Doctors of Science and 18 Candidates of Science, who have gone on to do their own influential research. [5]
Sergei Kopeikin, one of his fellow associates, writes in the book Frontiers in Relativistic Celestial Mechanics, "A key figure of relativistic celestial mechanics of the second half of twentieth century has been Victor A. Brumberg, a scholar who presently lives in Boston (USA) and who is still active in research. Victor A. Brumberg has made a significant contribution to general relativity and the science of relativistic planetary ephemerides of the solar system. He mentored and inspired many researchers around the globe (including the Editor of this book) to start working in the field of relativistic celestial mechanics. The very term "relativistic celestial mechanics" was introduced by Victor A. Brumberg in his famous monograph "Relativistic Celestial Mechanics" published in 1972 by Nauka (Science) - the main scientific publisher of the USSR - in Moscow. For the next two decades this monograph remained the most authoritative reference and the source of invaluable information for researchers working on relativistic equations of motion and experimental testing of general relativity." [6]
Main-belt asteroid 4916 Brumberg, discovered at the Crimean Astrophysical Observatory in 1970, was named in his honor. The official naming citation was published by the Minor Planet Center on 18 August 1997 ( M.P.C. 30475). [7]
The astronomical unit is a unit of length, roughly the distance from Earth to the Sun and approximately equal to 150 million kilometres or 8.3 light-minutes. The actual distance from Earth to the Sun varies by about 3% as Earth orbits the Sun, from a maximum (aphelion) to a minimum (perihelion) and back again once each year. The astronomical unit was originally conceived as the average of Earth's aphelion and perihelion; however, since 2012 it has been defined as exactly 149597870700 m.
The term ephemeris time can in principle refer to time in association with any ephemeris. In practice it has been used more specifically to refer to:
Celestial mechanics is the branch of astronomy that deals with the motions of objects in outer space. Historically, celestial mechanics applies principles of physics to astronomical objects, such as stars and planets, to produce ephemeris data.
In astronomy and celestial navigation, an ephemeris is a book with tables that gives the trajectory of naturally occurring astronomical objects as well as artificial satellites in the sky, i.e., the position over time. Historically, positions were given as printed tables of values, given at regular intervals of date and time. The calculation of these tables was one of the first applications of mechanical computers. Modern ephemerides are often provided in electronic form. However, printed ephemerides are still produced, as they are useful when computational devices are not available.
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Barycentric Dynamical Time is a relativistic coordinate time scale, intended for astronomical use as a time standard to take account of time dilation when calculating orbits and astronomical ephemerides of planets, asteroids, comets and interplanetary spacecraft in the Solar System. TDB is now defined as a linear scaling of Barycentric Coordinate Time (TCB). A feature that distinguishes TDB from TCB is that TDB, when observed from the Earth's surface, has a difference from Terrestrial Time (TT) that is about as small as can be practically arranged with consistent definition: the differences are mainly periodic, and overall will remain at less than 2 milliseconds for several millennia.
Barycentric Coordinate Time is a coordinate time standard intended to be used as the independent variable of time for all calculations pertaining to orbits of planets, asteroids, comets, and interplanetary spacecraft in the Solar System. It is equivalent to the proper time experienced by a clock at rest in a coordinate frame co-moving with the barycenter of the Solar System: that is, a clock that performs exactly the same movements as the Solar System but is outside the system's gravity well. It is therefore not influenced by the gravitational time dilation caused by the Sun and the rest of the system. TCB is the time coordinate for the Barycentric Celestial Reference System (BCRS).
Yusuke Hagihara was a Japanese astronomer noted for his contributions to celestial mechanics.
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Georgij Albertovich Krasinsky was a Russian astronomer active at the Institute of Applied Astronomy, Russian Academy of Science, St Petersburg. He was notable for research on planetary motions and ephemerides.
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