论文标题
遮盖的B [E]超级X射线X射线IGR J16318-4848的光学和红外研究
Optical and infrared study of the obscured B[e] supergiant high-mass X-ray binary IGR J16318-4848
论文作者
论文摘要
超巨大的高质量X射线二进制IGR J16318-4848是2003年积分卫星检测到的第一个来源，并通过其高固有吸收和B [E]现象来区分自身。它是研究二进制相互作用和超级b [e]恒星环境的理想候选者。这项研究针对IGR J16318-4848的局部特性。我们旨在阐明该系统的几何形状，并区分二进制中的不同关键排放区域。我们从VLT/X-Shooter提供光学到近红外光谱，并通过添加档案中型中红外Spitzer和Herschel数据来分析线条的两种精细结构和宽带光谱能量分布。我们还使用POWR代码进行了光学到近红外光谱的恒星气氛和风能建模。我们确定尘埃圆盘辐照的内边缘的贡献，得出赤道恒星风的速度，并建议恒星和磁盘之间的腔内紧凑的物体轨道。我们报告了源自球形磁盘风的扁平线，以及首次检测出恒星风的极性成分。恒星大气和风建模表明，中央恒星可能具有氦气增强的气氛，这可能是由于其强烈的氢化膜中的强烈散开部分。最后，我们将IGR J16318-4848的性质与类似的来源CI Cameleopardis进行了比较。
The supergiant High Mass X-ray Binary IGR J16318-4848 was the first source detected by the INTEGRAL satellite in 2003 and distinguishes itself by its high intrinsic absorption and B[e] phenomenon. It is the perfect candidate to study both binary interaction and the environment of supergiant B[e] stars. This study targets the local properties of IGR J16318-4848. We aim to clarify the geometry of this system, and distinguish different key emitting regions in the binary. We provide optical to near-infrared spectra from VLT/X-Shooter and analyse both fine structures of the lines and the broadband spectral energy distribution by adding archival mid-infrared Spitzer and Herschel data. We also performed a stellar atmosphere and wind modeling of the optical to near-infrared spectrum using the PoWR code. We determine the contribution of the irradiated inner edge of the dusty circumbinary disk, derive the velocity of an equatorial stellar wind, and suggest the compact object orbits within the cavity between the star and the disk. We report on flat-topped lines originating from a spherically symetric disk wind, along with the first detection of what is likely the polar component of the stellar wind. Stellar atmosphere and wind modeling shows that the central star may have a helium-enhanced atmosphere, likely because of its intense wind sheding part of its hydrogen envelope. Finally we compare the properties of IGR J16318-4848 with a similar source, CI Cameleopardis.
