A 62-minute orbital period black widow binary in a wide hierarchical triple
A 62-minute orbital period black widow binary in a wide hierarchical triple
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DOI：
10.1038/s41586-022-04551-1
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发表时间：
2022-05-05
期刊：
影响因子：
64.8
通讯作者：
Prince, Thomas A.
中科院分区：
文献类型：
--
作者：
Burdge, Kevin B.;Marsh, Thomas R.;Prince, Thomas A.
在近距离双星系统中，有超过12个毫秒级的恒星正在烧蚀低质量的伴星。在最初的“黑寡妇”中，8小时轨道周期的食脉冲星PSR J1959+2048（PSR B1957+20）（1），来自脉冲星2的高能辐射正在辐射，并可能最终摧毁（3）一个低质量的伴星。这些系统不仅是物理实验室，揭示了将一颗亲密的伴星星星暴露在脉冲星的相对论能量输出中的有趣结果，而且还被认为是一些质量最大的中子星的港湾，允许对中子星星状态方程进行强有力的测试。在这里，我们报告的观测ZTF J1406+1222，一个广泛的层次三主机62分钟的轨道周期黑寡妇候选人，其光通量的变化超过十倍。ZTF J1406+1222突破了演化模型的边界，低于富氢系统的80分钟最小轨道周期。宽第三伴星是一颗罕见的低金属丰度冷亚矮星星星，该系统的银河晕轨道与银河系中心附近一致，使其成为形成通道，中子星星踢物理学（6）和双星演化的探针。
Over a dozen millisecond pulsars are ablating low-mass companions in close binary systems. In the original 'black widow', the eight-hour orbital period eclipsing pulsar PSR J1959+2048 (PSR B1957+20)(1), high-energy emission originating from the pulsar2 is irradiating and may eventually destroy(3) a low-mass companion. These systems are not only physical laboratories that reveal the interesting results of exposing a close companion star to the relativistic energy output of a pulsar, but are also believed to harbour some of the most massive neutron stars(4), allowing for robust tests of the neutron star equation of state. Here we report observations of ZTF J1406+1222, a wide hierarchical triple hosting a 62-minute orbital period black widow candidate, the optical flux of which varies by a factor of more than ten. ZTF J1406+1222 pushes the boundaries of evolutionary models(5), falling below the 80-minute minimum orbital period of hydrogen-rich systems. The wide tertiary companion is a rare low-metallicity cool subdwarf star, and the system has a Galactic halo orbit consistent with passing near the Galactic Centre, making it a probe of formation channels, neutron star kick physics(6) and binary evolution.