S62 on a 9.9 yr Orbit around SgrA

被引：40

作者：

Peissker, Florian ^{[1
]}

Eckart, Andreas ^{[1
,2
]}

Parsa, Marzieh ^{[1
]}

机构：

[1] Univ Cologne, Phys Inst 1, Zulpicher Str 77, D-50937 Cologne, Germany

[2] Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany

来源：

ASTROPHYSICAL JOURNAL | 2020年 / 889卷 / 01期

关键词：

SUPERMASSIVE BLACK-HOLE; STELLAR PROPER MOTIONS; STAR-FORMATION; A-ASTERISK; COLLISIONS; MILKY; 1ST; EMISSION; VICINITY; NAOS;

D O I：

10.3847/1538-4357/ab5afd

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the Keplerian orbit of S62 around the supermassive black hole Sagittarius A* (SgrA*) in the center of our Galaxy. We monitor this S-star cluster member over more than a full orbit around SgrA* using the Very Large Telescope with the near-infrared instruments Spectrograph for INtegral Field Observations in the Near Infrared (SINFONI) and NAOS+CONICA (NACO). For that, we are deriving positional information from deconvolved images. We apply the Lucy-Richardson algorithm to the data sets. The NACO observations cover data from 2002 to 2018, and the SINFONI data cover 2008-2012. S62 can be traced reliably in both data sets. Additionally, we adapt one KECK dat and a periapse velocity of approximately 10% of the speed of light, S62 has the shortest known stable orbit around the supermassive black hole in the center of our Galaxy to date. From the analysis, we also derive the enclosed mass from a maximum likelihood method to be 4.15 0.6 x 10(6)M(circle dot).

引用

页数：12

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