利用 S2 星运动约束 Sgr A* 周围的标量云
星系天体物理
2023-09-06 v4 天体物理仪器与方法
广义相对论与量子宇宙学
摘要
S2 是距银河系中心最近的恒星之一，其运动已被精确测量并用于研究银河系中心的致密天体。人们普遍接受该天体为超大质量黑洞，但其环境的本质尚存讨论空间。在此，我们研究以超轻标量场“云”形式存在的暗物质在 Sgr A* 周围聚集的可能性。我们利用 S2 的可用数据执行马尔可夫链蒙特卡洛分析，并得到标量云结构的最佳拟合估计。我们的结果显示此类结构无实质性证据。当云的尺寸约为 S2 轨道尺寸量级时，我们可将其质量约束为小于中心质量的 0.1%，从而对银河系中心新场的存在设定强界。
引用
@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}
}
备注
Published on MNRAS. References added