Peissker, Florian ORCID: 0000-0002-9850-2708, Eckart, Andreas ORCID: 0000-0001-6049-3132 and Parsa, Marzieh (2020). S62 on a 9.9 yr Orbit around SgrA. Astrophys. J., 889 (1). BRISTOL: IOP PUBLISHING LTD. ISSN 1538-4357

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Abstract

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).

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Peissker, FlorianUNSPECIFIEDorcid.org/0000-0002-9850-2708UNSPECIFIED
Eckart, AndreasUNSPECIFIEDorcid.org/0000-0001-6049-3132UNSPECIFIED
Parsa, MarziehUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-348514
DOI: 10.3847/1538-4357/ab5afd
Journal or Publication Title: Astrophys. J.
Volume: 889
Number: 1
Date: 2020
Publisher: IOP PUBLISHING LTD
Place of Publication: BRISTOL
ISSN: 1538-4357
Language: English
Faculty: Faculty of Mathematics and Natural Sciences
Divisions: Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics I
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
SUPERMASSIVE BLACK-HOLE; STELLAR PROPER MOTIONS; STAR-FORMATION; A-ASTERISK; COLLISIONS; MILKY; 1ST; EMISSION; VICINITY; NAOSMultiple languages
Astronomy & AstrophysicsMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/34851

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