基于虚拟天文台的新激变变星AX J194939 +2631的识别
Virtual Observatory based identification of AX J194939+2631 as a new cataclysmic variable
摘要：
我们报告发现一个新的激变变量（CV）的身份不明的物体从ASCA银河系平面调查使用虚拟天文台数据挖掘。首先，我们用IPHAS J194938.39 + 263149.2识别了AX J194939 + 2631，这是IPHAS调查的1弧分区域中400个源中唯一突出的H-α发射体，然后作为在钱德拉档案数据集中发现的单个微弱X射线源进行了保护。光谱后续与3.5米卡拉尔阿尔托望远镜证实其分类为CV，可能具有磁性。我们的分析表明，AX J194939+2631是一个中距离系统（d ~ 0.6kpc），含有一个晚K型或早M型矮星作为次级成分，由双峰H-α线揭示了一个部分破裂的吸积盘。然而，需要额外的深度观测来确认我们对该天体作为中间极地的初步分类。
英文摘要：
We report the discovery of a new cataclysmic variable (CV) among unidentified objects from the ASCA Galactic Plane Survey made using the Virtual Observatory data mining. First, we identified AX J194939+2631 with IPHAS J194938.39+263149.2, the only prominent H-alpha emitter among 400 sources in a 1 arcmin field of the IPHAS survey, then secured as a single faint X-ray source found in an archival Chandra dataset. Spectroscopic follow-up with the 3.5-m Calar Alto telescope confirmed its classification as a CV, possibly of magnetic nature. Our analysis suggests that AX J194939+2631 is a medium distance system (d ~ 0.6 kpc) containing a late-K or early-M type dwarf as a secondary component and a partially disrupted accretion disc revealed by the double-peaked H-alpha line. However, additional deep observations are needed to confirm our tentative classification of this object as an intermediate polar.
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