论文标题
XMM-Newton研究Willman 1矮人球形星系的X射线源研究
XMM-Newton study of X-ray sources in the field of Willman 1 dwarf spheroidal galaxy
论文作者
论文摘要
我们介绍了Willman 1矮人球形星系的三个XMM-Newton观测值的分析结果（WIL 1）。 X射线源是根据光谱分析，硬度比，X射线与光通量比，X射线变异性以及与光学和红外波长可用目录进行分类的。我们在WIL 1的领域分类了97个来源。我们的分类显示了Wil 1中存在$β$ -Type共生星的存在。我们将WIL 1的一个M矮人前景星分类为1。此外，54个来源被归类为背景Agns和Galaxies。我们的研究表明，Wil 1的X射线源的发光度不超过$ \ sim $ 10 $^{34} $ erg s $^{ - 1} $在0.2---12.0 KeV的能量范围内，这类似于附近矮小球形源的观察到的源源。
We present the results of the analysis of three XMM-Newton observations of the Willman 1 dwarf spheroidal galaxy (Wil 1). X-ray sources are classified on the basis of spectral analysis, hardness ratios, X-ray-to-optical flux ratio, X-ray variability, plus cross-correlation with available catalogues in optical and infrared wavelengths. We catalogued 97 sources in the field of Wil 1. Our classification shows the presence of a $β$-type symbiotic star in Wil 1. We classified one M dwarf foreground star in the field of Wil 1. Moreover, fifty-four sources are classified as background AGNs and galaxies. Our study shows that the luminosity of the X-ray sources of Wil 1 does not exceed $\sim$10$^{34}$ erg s$^{-1}$ in the energy range of 0.2--12.0 keV, which is similar to observed luminosities of sources in nearby dwarf spheroidal galaxies.
