Near-infrared/optical identification of five low-luminosity X-ray pulsators
Near-infrared/optical identification of five low-luminosity X-ray pulsators
复制标题
五个低光度X射线脉动器的近红外/光学识别
DOI：
10.1111/j.1365-2966.2009.15919.x
复制
发表时间：
2009
影响因子：
4.8
通讯作者：
N. Degenaar
中科院分区：
文献类型：
--
作者：
R. Kaur;R. Wijnands;B. Paul;A. Patruno;N. Degenaar
我们提出了五个低光度X射线闪烁器（AX J1700.1 - 4157，AX J1740.1 - 2847，AX J1749.2 - 2725，AX J1820.5 - 1434和AX J1832.3 - 0840）的最可能的近红外（NIR）/光学对应物的识别，这些X射线闪烁器具有长脉冲周期（>150 s）。这些系统的X射线特性表明，它们可能是持久的高质量X射线双星或中间极星（IP）的成员。利用我们的钱德拉观测，我们发现了三个来源的最可能的对应物（不包括AX J1820.5−1434和AX J1832.3−0840）在欧洲南方天文台-新技术望远镜（ESO-NTT）近红外观测中，AX J1820.5−1434和AX J1832.3−0840可能分别在2微米全巡天和数字化巡天观测中出现。我们还使用我们的XMM-牛顿观测对所有源进行了X射线计时和光谱分析，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最有可能是吸积中子星，而AX J1700.1−4157、AX J1740.1−2847和AX J1832.3−0840可能是IP。
We present the identification of the most likely near-infrared (NIR)/optical counterparts of five low-luminosity X-ray pulsators (AX J1700.1−4157, AX J1740.1−2847, 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 (IPs). 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 European Southern Observatory-New Technology Telescope (ESO-NTT) NIR observations, and a possible counterpart for AX J1820.5−1434 and AX J1832.3−0840 in the Two Micron All Sky Survey and Digitized Sky Survey 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 harbour accreting neutron stars, while AX J1700.1−4157, AX J1740.1−2847 and AX J1832.3−0840 could be IPs.