观察野兽的心脏：黑洞双星LS 5039
Looking into the heart of a beast: the black hole binary LS 5039
摘要：
LS 5039是一个相对较近的微类星体，由一颗晚O型恒星和一个致密天体（很可能是一个黑洞）组成，轨道高度偏心，周期为3.9天。高的X射线、伽马射线和射电光度表明了光与物质的相互作用，这是由主恒星的恒星风向黑洞吸积产生的。以前的研究表明，LS 5039可能是一个原型的风馈高质量的X射线双星（WXB）与无盘的主序列O原色。现在有一个很好的机会来更好地了解奇异系统的配置和物理过程。2009年7月，加拿大MOST空间望远镜跟踪LS 5039，以获得长达一个月的半连续时间序列的超精确光度数据。与此同时，我们使用赛丁泉天文台的2.3米ANU望远镜同时拍摄了高分辨率光谱，并补充了2009年8月初用同一仪器获得的进一步数据。在这里，我们提出了第一个结果，从新的中阶梯光谱，这代表了最好的光学光谱以往任何时候都获得了这个有趣的系统。我们确定了LS 5039的基本轨道和物理参数，并通过径向速度测量和H-Balmer，He I和He II线的详细线轮廓分析来检查系统的配置和星周环境。
英文摘要：
LS 5039 is a relatively close microquasar consisting of a late O-type star and a compact object (very possibly a black hole) on a highly eccentric orbit with a period of 3.9 days. The high X-ray, gamma-ray and radio luminosity indicate light-matter interaction, which arise from the stellar wind of the primary star accreting toward the black hole. Former examinations suggest that LS 5039 could be a prototype of wind-fed high mass X-ray binaries (WXBs) with diskless main sequence O primaries. Now there is a great chance to better understand the configuration and the physical processes in the exotic system. In July 2009 LS 5039 was followed by the Canadian MOST space telescope to get ultraprecise photometric data in a month-long semi-continuous time series. Parallel to this, we have taken simultaneous high-resolution optical spectra using the 2.3m ANU telescope of the Siding Spring Observatory, supplemented with further data obtained in early August 2009 with the same instrument. Here we present the first results from the new echelle spectra, which represent the best optical spectroscopy ever obtained for this intriguing system. We determined fundamental orbital and physical parameters of LS 5039 and examined the configuration and the circumstellar environment of the system via radial velocity measurements and detailed line-profile analysis of H-Balmer, He I and He II lines.
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