Using the motion of S2 to constrain scalar clouds around SgrA*
Abstract
The motion of S2, one of the stars closest to the Galactic Centre, has been measured accurately and used to study the compact object at the centre of the Milky Way. It is commonly accepted that this object is a supermassive black hole but the nature of its environment is open to discussion. Here, we investigate the possibility that dark matter in the form of an ultralight scalar field ``cloud'' clusters around Sgr~A*. We use the available data for S2 to perform a Markov Chain Monte Carlo analysis and find the best-fit estimates for a scalar cloud structure. Our results show no substantial evidence for such structures. When the cloud size is of the order of the size of the orbit of S2, we are able to constrain its mass to be smaller than of the central mass, setting a strong bound on the presence of new fields in the galactic centre.
Keywords
Cite
@article{arxiv.2306.17215,
title = {Using the motion of S2 to constrain scalar clouds around SgrA*},
author = {GRAVITY Collaboration and A. Foschi and R. Abuter and N. Aimar and P. Amaro Seoane and A. Amorim and M. Bauböck and J. P. Berger and H. Bonnet and G. Bourdarot and W. Brandner and V. Cardoso and Y. Clénet and Y. Dallilar and R. Davies and P. T. de Zeeuw and D. Defrère and J. Dexter and A. Drescher and A. Eckart and F. Eisenhauer and M. C. Ferreira and N. M. Förster Schreiber and P. J. V. Garcia and F. Gao and E. Gendron and R. Genzel and S. Gillessen and T. Gomes and M. Habibi and X. Haubois and G. Heißel and T. Henning and S. Hippler and S. F. Hönig and M. Horrobin and L. Jochum and L. Jocou and A. Kaufer and P. Kervella and L. Kreidberg and S. Lacour and V. Lapeyrère and J. B. Le Bouquin and P. Léna and D. Lutz and F. Millour and T. Ott and T. Paumard and K. Perraut and G. Perrin and O. Pfuhl and S. Rabien and D. C. Ribeiro and M. Sadun Bordoni and S. Scheithauer and J. Shangguan and T. Shimizu and J. Stadler and O. Straub and C. Straubmeier and E. Sturm and C. Sykes and L. J. Tacconi and F. Vincent and S. von Fellenberg and F. Widmann and E. Wieprecht and E. Wiezorrek and J. Woillez},
journal= {arXiv preprint arXiv:2306.17215},
year = {2023}
}
Comments
Published on MNRAS. References added