Using the motion of S2 to constrain vector clouds around Sgr A

• Type: Article in International Scientific Journal
• Date: 2024

Authors

Foschi, A (Author) Other; Abuter, R (Author) Other; Abd El Dayem, K (Author) Other; Aimar, N (Author) Other; Seoane, PA (Author) Other; Amorim, A (Author) Other; Berger, JP (Author) Other; Bonnet, H (Author) Other; Bourdarot, G (Author) Other; Brandner, W (Author) Other; Davies, R (Author) Other; de Zeeuw, PT (Author) Other; Defrére, D (Author) Other; Dexter, J (Author) Other; Drescher, A (Author) Other; Eckart, A (Author) Other; Eisenhauer, F (Author) Other; Schreiber, NMF (Author) Other; P. J. V. Garcia (Author) FEUP; Genzel, R (Author) Other; Gillessen, S (Author) Other; Gomes, T (Author) Other; Haubois, X (Author) Other; Heissel, G (Author) Other; Henning, T (Author) Other; Jochum, L (Author) Other; Jocou, L (Author) Other; Kaufer, A (Author) Other; Kreidberg, L (Author) Other; Lacour, S (Author) Other; Lapeyrére, (Author) Other; Le Bouquin, JB (Author) Other; Léna, P (Author) Other; Lutz, D (Author) Other; Mang, F (Author) Other; Millour, F (Author) Other; Ott, T (Author) Other; Paumard, T (Author) Other; Perraut, K (Author) Other; Perrin, G (Author) Other; Pfuhl, O (Author) Other; Rabien, S (Author) Other; Ribeiro, DC (Author) Other; Bordoni, MS (Author) Other; Scheithauer, S (Author) Other; Shangguan, J (Author) Other; Shimizu, T (Author) Other; Stadler, J (Author) Other; Straubmeier, C (Author) Other; Sturm, E (Author) Other; Subroweit, M (Author) Other; Tacconi, LJ (Author) Other; Vincent, F (Author) Other; von Fellenberg, S (Author) Other; Woillez, J (Author) Other

Journal

Title: Monthly Notices of the Royal Astronomical Society

Vol. 530

Pages: 3740-3751

ISSN: 0035-8711

Publisher: Oxford University Press

Indexing

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Other information

Authenticus ID: P-010-E9M

DOI: 10.1093/mnras/stae423

Abstract (EN): The dark compact object at the centre of the Milky Way is well established to be a supermassive black hole with mass M-center dot similar to 4.3 x 10(6) M-circle dot, but the nature of its environment is still under debate. In this work, we used astrometric and spectroscopic measurements of the motion of the star S2, one of the closest stars to the massive black hole, to determine an upper limit on an extended mass composed of a massive vector field around Sagittarius A*. For a vector with effective mass 10(-19) (less than or similar to) m(s less than or similar to) 10(-18) eV, our Markov chain Monte Carlo analysis shows no evidence for such a cloud, placing an upper bound M-cloud (less than or similar to) 0.1 % M-center dot at 3 sigma confidence level. We show that dynamical friction exerted by the medium on S2 motion plays no role in the analysis performed in this and previous works, and can be neglected thus.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12