利用 VLTI/GRAVITY 对 HMXB BP Cru 进行亚毫角秒光学干涉测量
太阳与恒星天体物理
2025-06-04 v1 高能天体物理现象
摘要
我们使用 VLTI/GRAVITY 在近红外 K 波段通过干涉测量观测了大质量 X 射线双星（HMXB）BP Cru。连续谱可见度最多只是部分被分辨，这与超巨星的预测尺寸一致。在 HeI m 和 Br 谱线处观测到了差分可见度振幅（）和相位（）信号，其中后者在发射中表现强烈，这对于供体星的光谱类型而言是不寻常的。对于基线 m，差分相位均方根 对应于 as 的天体测量精度。在干涉测量的边缘分辨极限下进行的模型无关分析揭示了具有强波长依赖性的不对称且延展的发射。我们提出了基于延展且扭曲的星风和/或高密度气体流的几何模型，长期以来人们预测该系统中存在这种气体流。观测表明，光学干涉测量现在能够在吸积发生的空间尺度上分辨 HMXB，从而探测致密天体的引力和辐射场对其环境的影响。
引用
@article{arxiv.1705.02351,
title = {Sub-milliarcsecond Optical Interferometry of the HMXB BP Cru with VLTI/GRAVITY},
author = {GRAVITY Collaboration and I. Waisberg and J. Dexter and O. Pfuhl and R. Abuter and A. Amorin and N. Anugu and J. P. Berger and N. Blind and H. Bonnet and W. Brandner and A. Buron and Y. Clénet and W. de Wit and C. Deen and F. Delplancke-Ströbele and R. Dembet and G. Duvert and A. Eckart and F. Eisenhauer and P. Fédou and G. Finger and P. Garcia and R. Garcia Lopez and E. Gendron and R. Genzel and S. Gillessen and X. Haubois and M. Haug and F. Haussmann and Th. Henning and S. Hippler and M. Horrobin and Z. Hubert and L. Jochum and L. Jocou and P. Kervella and Y. Kok and M. Kulas and S. Lacour and V. Lapeyrère and J. -B. Le Bouquin and P. Lèna and M. Lippa and A. Mérand and E. Müller and T. Ott and L. Pallanca and J. Panduro and T. Paumard and K. Perraut and G. Perrin and S. Rabien and A. Ramírez and J. Ramos and C. Rau and R. -R. Rohloff and G. Rousset and J. Sanchez-Bermudez and S. Scheithauer and M. Schöller and C. Straubmeier and E. Sturm and F. Vincent and I. Wank and E. Wieprecht and M. Wiest and E. Wiezorrek and M. Wittkowski and J. Woillez and S. Yazici},
journal= {arXiv preprint arXiv:1705.02351},
year = {2025}
}
备注
Submitted to ApJ, 22 pages, 17 figures