五种低光度X射线辐射源的近红外/光学鉴别
Near-infrared/optical identification of five low-luminosity X-ray pulsators
摘要：
我们提出了五个低光度X射线闪烁器（AX J1700.1-4157，AX 1740.1-2847，AX J1749.2-2725，AX J1820.5-1434和AX J1832.3-0840）的最可能的近红外/光学对应物的鉴定，这些闪烁器具有长脉冲周期（> 150 s）。这些系统的X射线性质表明，它们可能是持久的高质量X射线双星或中间极星的成员。利用我们的Chandra观测，我们在ESO-NTT近红外观测中检测到三个源（不包括AX J1820.5-1434和AX J1832.3-0840）的最可能对应物，并分别在2 MASS和DSS观测中检测到AX J1820.5-1434和AX J1832.3-0840的可能对应物。我们还使用我们的XMM-牛顿观测对所有源进行了X射线定时和光谱分析，这进一步帮助我们限制了这些系统的性质。我们的多波长观测表明，AX J1749.2-2725和AX J1820.5-1434最有可能拥有吸积中子星，而AX J1700.1-4157，AX J1740.1-2847和AX J1832.3-0840可能是中间极星。
英文摘要：
We present the identification of the most likely near-infrared/optical counterparts of five low-luminosity X-ray pulsators (AX J1700.1-4157, AX 1740.1-2847, AX J1749.2-2725, AX J1820.5-1434 and AX J1832.3-0840) which have long pulse periods (> 150 s). The X-ray properties of these systems suggest that they are likely members of persistent high mass X-ray binaries or intermediate polars. Using our Chandra observations, we detected the most likely counterparts of three sources (excluding AX J1820.5-1434 and AX J1832.3-0840) in their ESO - NTT near-infrared observations, and a possible counterpart for AX J1820.5-1434 and AX J1832.3-0840 in the 2MASS and DSS observations respectively. We also performed the X-ray timing and spectral analysis for all the sources using our XMM-Newton observations, which further helped us to constrain the nature of these systems. Our multiwavelength observations suggest that AX J1749.2-2725 and AX J1820.5-1434 most likely harbor accreting neutron stars while AX J1700.1-4157, AX J1740.1-2847 and AX J1832.3-0840 could be intermediate polars.
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