DISK REFLECTION SIGNATURES IN THE SPECTRUM OF THE BRIGHT Z-SOURCE GX 340+0
DISK REFLECTION SIGNATURES IN THE SPECTRUM OF THE BRIGHT Z-SOURCE GX 340+0
复制标题
明亮 Z 源 GX 340 0 光谱中的圆盘反射特征
DOI：
--
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
N. Robba
中科院分区：
文献类型：
--
作者：
A. D’Aì;R. Iaria;T. D. Salvo;G. Matt;N. Robba
本文给出了对明亮的Z源GX 340+0进行50 ks长XMM-牛顿观测的初步结果。在这封信中，我们专注于研究的Fe Kα能带，其形状是明确解决和兼容的相对论涂抹的轮廓所产生的反射热吸积盘延伸接近中央吸积中子星星的广泛的非对称发射线。通过结合时间和频谱分析，我们能够遵循源沿着其水平分支的演变。然而，尽管在连续谱发射和光度的显着变化，线轮廓没有显示出任何强相关的变化。这条宽线是由高度电离的铁（Fe xxv）在接近13 Rg的推断内半径处的复合产生的，而拟合需要外盘半径的高值。源的倾斜度非常好地限制在35°，而发射率指数为-2.50。
We present the preliminary results of a 50 ks long XMM-Newton observation of the bright Z-source GX 340+0. In this Letter, we focus on the study of a broad asymmetric emission line in the Fe Kα energy band, whose shape is clearly resolved and compatible with a relativistically smeared profile arising from reflection on a hot accretion disk extending close to the central accreting neutron star. By combining temporal and spectral analysis, we are able to follow the evolution of the source along its horizontal branch. However, despite a significant change in the continuum emission and luminosity, the line profile does not show any strong correlated variation. This broad line is produced by recombination of highly ionized iron (Fe xxv) at an inferred inner radius close to 13Rg, while the fit requires a high value for the outer disk radius. The inclination of the source is extremely well constrained at 35°, while the emissivity index is −2.50.