Relativistic redshift of the star S0-2 orbiting the Galactic Center supermassive black hole
Tuan DoDepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USAAurelien HeesDepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USAAndrea GhezDepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USAGregory D. MartinezDepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USADevin S. ChuDepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USASiyao JiaDepartment of Astronomy, University of California, Berkeley, CA 94720, USAShoko SakaiDepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USAJessica R. LuDepartment of Astronomy, University of California, Berkeley, CA 94720, USAAbhimat K. GautamDepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USAKelly Kosmo O’NeilDepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USAEric E. BecklinDepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USAM. MorrisDepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USAKeith MatthewsDivision of Physics, Mathematics, and Astronomy, California Institute of Technology, MC 301-17, Pasadena, CA 91125, USAShogo NishiyamaFaculty of Education, Miyagi University of Education, 149 Aramaki-aza-aoba, Aoba-ku, Sendai, Miyagi 980-0845, JapanRandy CampbellW. M. Keck Observatory, 65-1120 Mamalahoa Highway, Kamuela, HI 96743, USASamantha ChappellDepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USAZhuo ChenDepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USAAnna CiurloDepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USAArezu DehghanfarDepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USAEulalia Gallego-CanoInstituto de Astrofísica de Andalucía, Consejo Superior de Investigaciones Científicas, Glorieta de la Astronomía S/N, 18008 Granada, SpainWolfgang KerzendorfCenter for Cosmology and Particle Physics, New York University, 726 Broadway, New York, NY 10003, USAJames E. LykeW. M. Keck Observatory, 65-1120 Mamalahoa Highway, Kamuela, HI 96743, USASmadar NaozDepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USAHiromi SaidaFaculty of Liberal Arts, Daido University, 10-3 Takiharu-cho, Minami-ku, Nagoya, Aichi 457-8530, JapanRainer SchödelInstituto de Astrofísica de Andalucía, Consejo Superior de Investigaciones Científicas, Glorieta de la Astronomía S/N, 18008 Granada, SpainMasaaki TakahashiDepartment of Physics and Astronomy, Aichi University of Education, 1 Hirosawa, Igaya-cho, Kariya, Aichi 448-8542, JapanYohsuke TakamoriNational Institute of Technology, Wakayama College, 77 Noshima, Nada-cho, Gobo, Wakayama 644-0023, JapanGunther WitzelDepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USAPeter WizinowichW. M. Keck Observatory, 65-1120 Mamalahoa Highway, Kamuela, HI 96743, USA
2019en
ABI
Аннотация
The general theory of relativity predicts that a star passing close to a supermassive black hole should exhibit a relativistic redshift. In this study, we used observations of the Galactic Center star S0-2 to test this prediction. We combined existing spectroscopic and astrometric measurements from 1995-2017, which cover S0-2's 16-year orbit, with measurements from March to September 2018, which cover three events during S0-2's closest approach to the black hole. We detected a combination of special relativistic and gravitational redshift, quantified using the redshift parameter ϒ. Our result, ϒ = 0.88 ± 0.17, is consistent with general relativity (ϒ = 1) and excludes a Newtonian model (ϒ = 0) with a statistical significance of 5σ.
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