|Alma mater||Moscow State University|
Sternberg Astronomical Institute
|Known for||Research in Relativity and Gravitation and for Tests of General Relativity including the speed of gravity, pulsar timing, gravitomagnetism, cosmology, VLBI and relativistic geodesy|
|Institutions||University of Missouri-Columbia|
|Thesis||General Relativistic Equations of Binary Motion for Extended Bodies with Conservative Corrections and Radiation Damping (1986)|
|Doctoral advisors||Yakov Borisovich Zel'dovich Leonid Petrovich Grishchuk|
|Doctoral students||Oleg Doroshenko|
Sergei Kopeikin (born April 10, 1956) is a USSR-born theoretical physicist presently living and working in the United States, where he holds the position of Professor of Physics at the University of Missouri in Columbia, Missouri. He specializes in the theoretical and experimental study of gravity and general relativity. He is also an expert in the field of the astronomical reference frames and time metrology. His general relativistic theory of the Post-Newtonian reference frames which he had worked out along with Victor A. Brumberg, was adopted in 2000 by the resolutions of the International Astronomical Union as a standard for reduction of ground-based astronomical observation. A computer program Tempo2 used to analyze radio observations of pulsars, includes several effects predicted by S. Kopeikin that are important for measuring parameters of the binary pulsars, for testing general relativity, and for detection of gravitational waves of ultra-low frequency.
In September 2002, S. Kopeikin led a team which conducted a high-precision VLBI experiment to measure the fundamental speed of gravity, thus, confirming the Einstein's prediction on the relativistic nature of gravitational field and its finite speed of propagation.
He is also involved in studies concerning the capabilities of the Lunar Laser Ranging (LLR) technique to measure dynamical features of the General Theory of Relativity in the lunar motion. He has critically analyzed the claims of other scientists concerning the possibility of LLR to measure the gravitomagnetic interaction. Prof. Kopeikin organized and chaired three international workshops on the advanced theory and model of the Lunar Laser Ranging experiment. The LLR workshops were held in the International Space Science Institute (Bern, Switzerland) in 2010-2012.
Recently, S. Kopeikin has been actively involved in theoretical studies on relativistic geodesy and applications of atomic clocks for high-precision navigation and in geodetic datum. He has provided an exact relativistic definition of geoid, and worked out the post-Newtonian concepts of the Maclaurin spheroid  and normal gravity formula. S. Kopeikin's workshop on spacetime metrology, clocks and relativistic geodesy is held in the International Space Science Institute (Bern, Switzerland).
Kopeikin was born in Kashin, a small town near Moscow in what was then the USSR. He graduated with excellence from Department of Astrophysics of Moscow State University in 1983 where he studied general relativity under Leonid Grishchuk. In 1986, he obtained a Ph.D. in relativistic astrophysics from the Space Research Institute in Moscow. His Ph.D. thesis was advised by Yakov Borisovich Zel'dovich and presented a first general-relativistic derivation of the conservative and radiation reaction forces in the Post-Newtonian expansion of the gravitational field of a binary system of two extended, massive bodies. In 1991, he obtained a Doctor of Science degree in Physics and Mathematics from Moscow State University and moved to Tokyo (Japan) in 1993 to teach astronomy in Hitotsubashi University. He was adjunct staff member in National Astronomical Observatory of Japan in 1993-1996 and a visiting professor in the same observatory in 1996-1997. Kopeikin moved to Germany in 1997 and worked in the Institute for Theoretical Physics of Friedrich Schiller University of Jena and in Max Planck Institute for Radio Astronomy until 1999. He had joined Department of Physics and Astronomy of the University of Missouri in February 2000 where he got tenure in 2004.
He has been married to Zoia Kopeikina (daughter of Solomon Borisovich Pikelner) since 1980, they have four daughters, four granddaughters and one grandson. As of February 2000 the family lives in Columbia, Missouri.
Prof. Kopeikin has published 187 scientific papers and 2 books. He was an editor of two other books on advances in relativistic celestial mechanics. According to Google Scholar Citations program, the h-index of S.M. Kopeikin is 34, his i10-index is 73, while the total number of citations is 3905. As of September 2018, NASA ADS returns a h-index equal to 27, while the tori index and the riq index are 43.3 and 177, respectively.
- G. B. Hobbs; R. T. Edwards; R. N. Manchester (2006). "TEMPO2, a new pulsar timing package. I: Overview". Monthly Notices of the Royal Astronomical Society. 369 (2): 655–672. arXiv:astro-ph/0603381. Bibcode:2006MNRAS.369..655H. doi:10.1111/j.1365-2966.2006.10302.x.
- R. T. Edwards; G. B. Hobbs; R. N. Manchester (2006). "TEMPO2, a new pulsar timing package. II: The timing model and precision estimates". Monthly Notices of the Royal Astronomical Society. 372 (4): 1549–1574. arXiv:astro-ph/0607664. Bibcode:2006MNRAS.372.1549E. doi:10.1111/j.1365-2966.2006.10870.x.
- S. M. Kopeikin (1995). "On possible implications of orbital parallaxes of wide orbit binary pulsars and their measurability". Astrophysical Journal Letters. 439 (1): L5–L8. Bibcode:1995ApJ...439L...5K. doi:10.1086/187731.
- S. M. Kopeikin (1996). "Proper Motion of Binary Pulsars as a Source of Secular Variations of Orbital Parameters". Astrophysical Journal Letters. 467 (8): L93–L95. Bibcode:1996ApJ...467L..93K. doi:10.1086/310201.
- S. M. Kopeikin (1985). "General Relativistic Equations of Binary Motion for Extended Bodies with Conservative Corrections and Radiation Damping". Soviet Astronomy. 29 (8): 516–524. Bibcode:1985SvA....29..516K.
- S. M. Kopeikin (1997). "Binary pulsars as detectors of ultralow-frequency gravitational waves". Physical Review D. 56 (8): 4455–4469. Bibcode:1997PhRvD..56.4455K. doi:10.1103/PhysRevD.56.4455.
- S. M. Kopeikin (2001). "Testing the Relativistic Effect of the Propagation of Gravity by Very Long Baseline Interferometry". Astrophysical Journal Letters. 556 (1): L1–L5. arXiv:gr-qc/0105060. Bibcode:2001ApJ...556L...1K. doi:10.1086/322872.
- S. M. Kopeikin (2003). "The Measurement of the Light Deflection from Jupiter: Experimental Results". Astrophysical Journal. 598 (1): 704–711. arXiv:astro-ph/0302294. Bibcode:2003ApJ...598..704F. doi:10.1086/378785.
- "Einstein proved right on gravity". BBC News. January 8, 2003. Retrieved April 17, 2010.
- "Physicist Says Testing Technique For Gravitomagnetic Field Is Ineffective". Science Daily. June 2, 2007. Retrieved April 17, 2010.
- "Theory and Model for the New Generation of the Lunar Laser Ranging Data". International Space Science Institute.
- J. Müller; D. Dirkx; S. M. Kopeikin; G. Lion; I.Panet; P.N.A.M. Visser (2018). "High Performance Clocks and Gravity Field Determination". Space Science Reviews. 214 (1): 5. arXiv:1702.06761. Bibcode:2018SSRv..214....5M. doi:10.1007/s11214-017-0431-z.
- S. M. Kopeikin; E. M. Mazurova; A. P. Karpik (2015). "Towards an exact relativistic theory of Earth's geoid undulation". Physics Letters A. 379 (26–27): 1555–1562. arXiv:1411.4205. Bibcode:2015PhLA..379.1555K. doi:10.1016/j.physleta.2015.02.046.
- S. M. Kopeikin; W.-B. Han; E. M. Mazurova (2016). "Post-Newtonian reference ellipsoid for relativistic geodesy". Physical Review D. 93 (4): 044069. arXiv:1510.03131. Bibcode:2016PhRvD..93d4069K. doi:10.1103/PhysRevD.93.044069.
- S. M. Kopeikin; I. Y. Vlasov; W.-B. Han (2018). "Normal gravity field in relativistic geodesy". Physical Review D. 97 (4): 045020. arXiv:1708.09456. Bibcode:2018PhRvD..97d5020K. doi:10.1103/PhysRevD.97.045020.
- "Spacetime Metrology, Clocks and Relativistic Geodesy". International Space Science Institute.
- Pepe, Alberto; Kurtz, Michael J. (November 2012). "A Measure of Total Research Impact Independent of Time and Discipline". PLoS ONE. 7 (11): e46428. arXiv:1209.2124. Bibcode:2012PLoSO...746428P. doi:10.1371/journal.pone.0046428. PMC 3492370. PMID 23144782. e46428.
- "The real reason why the Pioneer spacecrafts appear to be slowing down" - theoretical study of the Pioneer anomaly effect
- "Test for Einstein's gravity speed theory" - a BBC News article about the preparations to the "speed-of-gravity" experiment
- "Speed of Gravity Measured for First Time" - a NRAO press-release on VLBI experiment measured the ultimate speed of gravity
- "Einstein Was Right on Gravity's Velocity" - The New York Times, January 8, 2003
- "Physicist Disputes Speed of Gravity Claim" - American Physical Society News article, dated June 2003, describing criticism of the results
- "Aberration and the Fundamental Speed of Gravity in the Jovian Deflection Experiment" - a rebuttal of the criticism
- "Gravimagnetism, Causality, and Aberration of Gravity in the Gravitational Light-Ray Deflection Experiments" - Kopeikin's new proposals for further improvements of the experimental results on the fundamental speed of gravity
- "Frontiers in Relativistic Celestial Mechanics. Vol. 1. Theory" - edited by S. Kopeikin
- "Frontiers in Relativistic Celestial Mechanics. Vol. 2. Applications and Experiments" - edited by S. Kopeikin
- "Relativistic Celestial Mechanics of the Solar System" - monograph by S. Kopeikin, M. Efroimsky and G. Kaplan
- "Metric Theories of Gravity: perturbations and conservation laws" - monograph by A. Petrov, S. Kopeikin, B. Tekin and R. Lompay