论文标题
XMM-Newton观察11个中间球和可能的候选人
XMM-Newton observations of eleven intermediate polars and possible candidates
论文作者
论文摘要
我们的目标是从有希望的候选人列表中识别XMM-Newton观察中的新中间球（IP）。通过选择以前未知的X射线明亮的目标，我们旨在发现证据表明X射线不足的IP亚群。我们对XMM-Newton X射线的搜索和目标的光学数据进行了搜索，以寻求旋转和轨道周期，这在IP上有所不同。我们还研究了X射线光谱，以找到这些物体显示的热等离子体发射。借助档案快速数据，我们粗略地研究了长期X射线变异性，并通过来自各种目录的档案光学数据，将光学与X射线光度进行了比较，以识别X射线的微弱对象。本文介绍了对原型IP的第一个XMM-Newton观察。我们发现HZ〜PUP，V349 AQR和IGR J18151-1052是IPS的牢固证据，分别为1552、390和390 s的白色矮人旋转周期。前两个具有典型的IP的照明性，后者被强烈吸收并且距离未知。 Gi〜mon和V1084〜她显然是非磁性CV，与WD旋转无关的有趣短期可变性。 V533〜她可能是磁性简历，仍然是一个很好的IP候选者，而V1039 CEN可能是极性的。其余的候选人太微弱了，无法得出任何确定的结论。
We aim to identify new intermediate polars (IPs) in XMM-Newton observations from a list of promising candidates. By selecting targets not previously known to be X-ray bright we aim to uncover evidence for an X-ray underluminous IP subpopulation. We performed period searches on the XMM-Newton X-ray and optical data of our targets to seek both the spin and orbital periods, which differ in IPs. We also investigated the X-ray spectra to find the hot plasma emission shown by these objects. With archival Swift data we coarsely investigated the long-term X-ray variability, and with archival optical data from a variety of catalogues, we compared the optical to X-ray luminosity to identify X-ray faint objects. This paper presents the first XMM-Newton observation of the prototype IP, DQ Her. We find firm evidence for HZ~Pup, V349 Aqr, and IGR J18151-1052 being IPs, with likely white dwarf spin periods of 1552, 390, and 390 s, respectively. The former two have luminosities typical of IPs, and the latter is strongly absorbed and with unknown distance. GI~Mon and V1084~Her are apparently non-magnetic CVs with interesting short-term variability unrelated to WD spin. V533~Her is probably a magnetic CV and remains a good IP candidate, while V1039 Cen is possibly a polar. The remaining candidates were too faint to allow for any firm conclusions.
