银心附近的红外超源 DSO/G2：理论与观测
星系天体物理
2016-01-07 v2
摘要
基于2014和2015年利用ESO VLT/SINFONI对尘埃S星团天体（DSO/G2）最接近银心超大质量黑洞期间的监测，我们进一步探索了用一颗年轻吸积恒星的模型来解释观测到的光谱和形态学特征。恒星情形得到了我们的发现的支持，即DSO的电离氢发射在近心点经过前后保持空间致密。DSO/G2天体作为致密单峰发射线源的发现与无核云的原始假设不一致，后者必然被潮汐拉伸，从而在近心点经过附近产生双峰发射线轮廓。这加强了证据：DSO/G2源是一颗被尘埃包裹的年轻恒星，似乎处于吸积阶段。从星周盘落到恒星表面的物质可以显著贡献于Br线的发射以及观测到的约10埃的大线宽。
引用
@article{arxiv.1507.00237,
title = {Infrared-excess Source DSO/G2 Near the Galactic Center: Theory vs. Observations},
author = {Michal Zajacek and Andreas Eckart and Florian Peissker and Grischa D. Karssen and Vladimir Karas},
journal= {arXiv preprint arXiv:1507.00237},
year = {2016}
}
备注
6 pages, 5 figures; to be published in the proceedings of the WDS 2015 organized by the Charles University in Prague. Also presented as a talk at EWASS 2015 (June 25, Special Session: Low-Accretion physics in the Universe), La Laguna, Tenerife, Canary Islands; revised after receiving the comments from referees