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Testing General Relativity with Stellar Orbits around the Supermassive Black Hole in Our Galactic Center.
Hees, A; Do, T; Ghez, A M; Martinez, G D; Naoz, S; Becklin, E E; Boehle, A; Chappell, S; Chu, D; Dehghanfar, A; Kosmo, K; Lu, J R; Matthews, K; Morris, M R; Sakai, S; Schödel, R; Witzel, G.
Afiliação
  • Hees A; Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.
  • Do T; Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.
  • Ghez AM; Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.
  • Martinez GD; Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.
  • Naoz S; Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.
  • Becklin EE; Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.
  • Boehle A; Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.
  • Chappell S; Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.
  • Chu D; Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.
  • Dehghanfar A; Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.
  • Kosmo K; Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.
  • Lu JR; Astronomy Department, University of California, Berkeley, California 94720, USA.
  • Matthews K; Division of Physics, Mathematics, and Astronomy, California Institute of Technology, MC 301-17, Pasadena, California 91125, USA.
  • Morris MR; Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.
  • Sakai S; Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.
  • Schödel R; Instituto de Astrofísica de Andalucía (CSIC), Glorieta de la Astronomía S/N, 18008 Granada, Spain.
  • Witzel G; Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.
Phys Rev Lett ; 118(21): 211101, 2017 May 26.
Article em En | MEDLINE | ID: mdl-28598651
ABSTRACT
We demonstrate that short-period stars orbiting around the supermassive black hole in our Galactic center can successfully be used to probe the gravitational theory in a strong regime. We use 19 years of observations of the two best measured short-period stars orbiting our Galactic center to constrain a hypothetical fifth force that arises in various scenarios motivated by the development of a unification theory or in some models of dark matter and dark energy. No deviation from general relativity is reported and the fifth force strength is restricted to an upper 95% confidence limit of |α|<0.016 at a length scale of λ=150 astronomical units. We also derive a 95% confidence upper limit on a linear drift of the argument of periastron of the short-period star S0-2 of |ω[over ˙]_{S0-2}|<1.6×10^{-3} rad/yr, which can be used to constrain various gravitational and astrophysical theories. This analysis provides the first fully self-consistent test of the gravitational theory using orbital dynamic in a strong gravitational regime, that of a supermassive black hole. A sensitivity analysis for future measurements is also presented.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2017 Tipo de documento: Article
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2017 Tipo de documento: Article