论文标题
在球状簇M92（NGC 6341）中快速发现黯然失色的二进制二千杆脉冲星（NGC 6341）
The FAST discovery of an Eclipsing Binary Millisecond Pulsar in the Globular Cluster M92 (NGC 6341)
论文作者
论文摘要
我们报告了在球状簇M92（NGC6341）中发现了一个黯然失色的二进制毫秒脉冲星，该脉冲星带有五百米的光圈球形射电望远镜（FAST）。 PSR J1717+4308A（M92A）的脉冲频率为316.5〜Hz（3.16〜ms），分散度量为35.45 PC CM $ $^{ - 3} $。 PULSAR是二进制系统的成员，其轨道周期为0.20〜天，低质量伴侣的中位数为$ \ sim $ 0.18〜 \ ms。从到目前为止的观测值中，每个轨道中至少观察到了两个黯然失色的事件。在轨道相范围0.1--0.5中持续〜5000〜S的较长距离。另一个持续约500〜S，发生在更长的黯然失色事件之前或之后的1000--2000〜S之间。这两个黯然失色的事件的长度也发生了变化。这些属性表明J1717+4308a是一个具有低质量主序列或亚巨型伴侣的``红回复''系统。脉冲星的时机观察和对其他脉冲星的数据的进一步搜索正在进行中。
We report the discovery of an eclipsing binary millisecond pulsar in the globular cluster M92 (NGC6341) with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). PSR J1717+4308A, or M92A, has a pulse frequency of 316.5~Hz (3.16~ms) and a dispersion measure of 35.45 pc cm$^{-3}$. The pulsar is a member of a binary system with an orbital period of 0.20~days around a low-mass companion which has a median mass of $\sim$0.18~\Ms. From observations so far, at least two eclipsing events have been observed in each orbit. The longer one lasted for ~5000~s in the orbital phase range 0.1--0.5. The other lasted for ~500~s and occurred between 1000--2000~s before or after the longer eclipsing event. The lengths of these two eclipsing events also change. These properties suggest that J1717+4308A is a ``red-back'' system with a low-mass main sequence or sub-giant companion. Timing observations of the pulsar and further searches of the data for additional pulsars are ongoing.
