论文标题
带有钱德拉的球状簇M62的多ePoch X射线成像
Multi-Epoch X-ray Imaging of Globular Cluster M62 with Chandra
论文作者
论文摘要
使用{\ it chandra}获得的$ \ sim144 $ ks的档案光谱图像数据，在球状簇M62（NGC6266）的半光半径内检测到43个X射线源。基于X射线颜色露光图或与已知来源的位置重合，我们将这些来源分为不同的紧凑型二元组，包括灾难性变量（CV），静止的低质量X射线X射线二进制二进制（QLMXB），毫秒（MSP）和黑洞（MSP）和黑洞（BH）。在我们的分析中确定了12个CV，4个QLMXB，2个MSP和1 BH的X射线对应物的候选物。我们分析中使用的数据包括两个分开12年的帧，这使我们能够搜索每个观察窗口内的长期变异性以及短期X射线通量变异性。在7和12来源中分别发现了短期可变性和长期可变性的证据。对于具有X射线照明的许多明亮来源，$ l_ {x} \ gtrsim 10^{32} $ 〜ERG/s，我们在更多详细信息中表征了它们的频谱属性。通过将M62中的X射线种群与其他几个原型球状簇中的X射线种群进行比较，我们发现M62中明亮来源的比例较大，这可能是它们主动动态形成过程的结果。
Using archival spectral-imaging data with a total exposure of $\sim144$ ks obtained by {\it Chandra}, 43 X-ray sources are detected within the half-light radius of globular cluster M62 (NGC6266). Based on the X-ray colour-luminosity diagram or the positional coincidences with known sources, we have classified these sources into different groups of compact binaries including cataclysmic variable (CV), quiescent low mass X-ray binary (qLMXB), millisecond pulsar (MSP) and black hole (BH). Candidates of the X-ray counterparts of 12 CVs, 4 qLMXBs, 2 MSPs and 1 BH are identified in our analysis. The data used in our analysis consist of two frames separated by 12 years, which enable us to search for the long-term variability as well as the short-term X-ray flux variability within each observation window. Evidence for the short-term variability and long-term variability have been found in 7 and 12 sources respectively. For a number of bright sources with X-ray luminosities $L_{x}\gtrsim 10^{32}$~erg/s, we have characterized their spectral properties in further details. By comparing the X-ray population in M62 with those in several other prototypical globular clusters, we found the proportion of bright sources is larger in M62 which can possibly be a result of their active dynamical formation processes.
