The Shortest-Known-Period Star Orbiting Our Galaxy's Supermassive Black Hole

被引：162

作者：

Meyer, L. ^{[1
]}

Ghez, A. M. ^{[1
]}

Schoedel, R. ^{[2
]}

Yelda, S. ^{[1
]}

Boehle, A. ^{[1
]}

Lu, J. R. ^{[3
]}

Do, T. ^{[4
,5
]}

Morris, M. R. ^{[1
]}

Becklin, E. E. ^{[1
]}

Matthews, K. ^{[6
]}

机构：

[1] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

[2] Inst Astrofis Andalucia CSIC, Granada 18008, Spain

[3] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA

[4] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

[5] Univ Toronto, Dunlap Inst Astron & Astrophys, Toronto, ON M5S 3H4, Canada

[6] CALTECH, Div Math Phys & Astron, Pasadena, CA 91125 USA

来源：

SCIENCE | 2012年 / 338卷 / 6103期

基金：

美国国家科学基金会;

关键词：

SAGITTARIUS-A-ASTERISK; GALACTIC-CENTER; STELLAR ORBITS; PROPER MOTIONS; MILKY; S2;

D O I：

10.1126/science.1225506

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Stars with short orbital periods at the center of our Galaxy offer a powerful probe of a supermassive black hole. Over the past 17 years, the W. M. Keck Observatory has been used to image the galactic center at the highest angular resolution possible today. By adding to this data set and advancing methodologies, we have detected S0-102, a star orbiting our Galaxy's supermassive black hole with a period of just 11.5 years. S0-102 doubles the number of known stars with full phase coverage and periods of less than 20 years. It thereby provides the opportunity, with future measurements, to resolve degeneracies in the parameters describing the central gravitational potential and to test Einstein's theory of general relativity in an unexplored regime.

引用

页码：84 / 87

页数：4

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