磁激变变星的硬X射线性质
Hard X-ray properties of magnetic cataclysmic variables
摘要：
硬X射线测量已被证明在探测中间极和异步极方面非常有效，这是两种最罕见的激变变星（CV）类型。在这里，我们提出了一个全球性的研究硬X射线选定的中间极性和异步极性，特别是集中在硬X射线属性和自旋/轨道周期之间的联系。为此，我们首先构建了一个新的样本，这些对象的交叉相关的候选源检测到INTEGRAL/IBIS观测对目录的已知CV。我们发现23个灾难性的变量匹配，并提出了一个额外的9（其中3个是明确的）可能的磁灾难性的变量（mCV）确定通过光学后续行动的IBIS检测。为了使我们的研究更加完整，我们还在我们的分析中包括Swift/BAT和SUZAKU/HXD的硬X射线观测。我们发现，大多数硬X射线检测的mCV具有周期间隙以上的P_{spin} / P_{orb} <0.1。在这方面，我们还指出，在P_{spin} / P_{orb} =0.3和P_{spin} / P_{orb} =1之间的任何频带中，检测到的系统数量非常少，并且P_{spin} / P_{orb}分布的表观峰值约为0.1。在mCV演化情景的背景下讨论了P_{spin} - P_{orb}平面的观测特征。我们还首次提出了硬X射线光谱硬度与P_{spin}、P_{orb}和P_{spin} / P_{orb}之间相关性的证据。试图解释所观察到的相关性的背景下mCV的演变和吸积足迹的几何形状的白矮星表面。
英文摘要：
Hard X-ray surveys have proven remarkably efficient in detecting intermediate polars and asynchronous polars, two of the rarest type of cataclysmic variable (CV). Here we present a global study of hard X-ray selected intermediate polars and asynchronous polars, focusing particularly on the link between hard X-ray properties and spin/orbital periods. To this end, we first construct a new sample of these objects by cross-correlating candidate sources detected in INTEGRAL/IBIS observations against catalogues of known CVs. We find 23 cataclysmic variable matches, and also present an additional 9 (of which 3 are definite) likely magnetic cataclysmic variables (mCVs) identified by others through optical follow-ups of IBIS detections. We also include in our analysis hard X-ray observations from Swift/BAT and SUZAKU/HXD in order to make our study more complete. We find that most hard X-ray detected mCVs have P_{spin}/P_{orb}<0.1 above the period gap. In this respect we also point out the very low number of detected systems in any band between P_{spin}/P_{orb}=0.3 and P_{spin}/P_{orb}=1 and the apparent peak of the P_{spin}/P_{orb} distribution at about 0.1. The observational features of the P_{spin} - P_{orb} plane are discussed in the context of mCV evolution scenarios. We also present for the first time evidence for correlations between hard X-ray spectral hardness and P_{spin}, P_{orb} and P_{spin}/P_{orb}. An attempt to explain the observed correlations is made in the context of mCV evolution and accretion footprint geometries on the white dwarf surface.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
