Galactic Center中气体流星G1-2-3
星系天体物理
2026-03-11 v1
摘要
银河中心的黑洞Sgr A*是极低喂入率银河系核星系的典型代表。其在近距离处发现的若干个气体团块（每颗质量约为地球几倍）提供了足够的气体储备来驱动Sgr A*。特别是气体云G2因其极端轨道而受到关注，其在轨道近地点处距离约100天文单位，并因与黑洞吸积流的相互作用而在飞掠过程中显著失去动能。13年前，类似的气体云G1在相似的轨道上经过Sgr A*。G2的起源曾是讨论的焦点，包括来自中心（恒星）源的模型仍被提出作为纯气体云模型的备选方案。本文报告了第三颗气体团块的轨道，其轨道几乎沿相同轨迹运行。由于三颗恒星在近距离轨道上的概率极小，这强有力地反驳了基于恒星的源模型。相反，我们表明气体流星G1-2-3可来自位于IRS16SW这颗巨型双星系统的恒星风。该论点得到以下事实的支撑：三颗轨道之间的细小差异——即在共同平面上的轨道椭圆定向随时间变化——与IRS16SW的轨道运动相一致。
引用
@article{arxiv.2510.00897,
title = {The gas streamer G1-2-3 in the Galactic Center},
author = {S. Gillessen and F. Eisenhauer and J. Cuadra and R. Genzel and D. Calderon and S. Joharle and T. Piran and D. C. Ribeiro and C. M. P. Russell and M. Sadun Bordoni and A. Burkert and G. Bourdarot and A. Drescher and F. Mang and T. Ott and G. Agapito and A. Agudo Berbel and A. Baruffolo and M. Bonaglia and M. Black and R. Briguglio and Y. Cao and L. Carbonaro and G. Cresci and Y. Dallilar and R. Davies and M. Deysenroth and I. Di Antonio and A. Di Cianno and G. Di Rico and D. Doelman and M. Dolci and S. Esposito and D. Fantinel and D. Ferruzzi and H. Feuchtgruber and N. M. Förster Schreiber and A. M. Glauser and P. Grani and M. Hartl and D. Henry and H. Huber and C. Keller and M. Kenworthy and K. Kravchenko and J. Lightfoot and D. Lunney and D. Lutz and M. Macintosh and F. Mannucci and D. Pearson and A. Puglisi and S. Rabien and C. Rau and A. Riccardi and B. Salasnich and T. Shimizu and F. Snik and E. Sturm and L. J. Tacconi and W. Taylor and A. Valentini and C. Waring and M. Xompero},
journal= {arXiv preprint arXiv:2510.00897},
year = {2026}
}
备注
7 pages, 5 figures, under review at A&A