论文标题
V723 Mon的看不见的伴侣的X射线约束：它是一个质量差异黑洞，而不是二进制中子星星
X-ray constraint for the unseen companion of V723 Mon: it is a mass-gap black hole rather than binary neutron stars
论文作者
论文摘要
最近，据报道，红色巨型V723 MON具有看不见的伴侣，质量为3.04美元\ pm0.06m _ {\ odot} $，但是问题仍然存在问题，即它是一个单个（因此是所谓的质量间隙）黑洞还是两个普通紧凑型物体的内部二进制（中子或白色dwarfs）。在这项工作中，我们通过考虑将V723 MON的风源积聚到紧凑型伴侣来估计X射线发射。我们分析了黑暗伴侣的三种不同场景，即单个黑洞，二进制中子星和中子星和白矮人的二进制。我们表明，单个黑洞是最喜欢的情况。我们还计算了由紧凑型伴侣与风的相互作用引起的弓休克的同步发射。我们发现该排放峰值为$ \ sim $ 0.1-1 GHz，其磁通密度$ \ sim $ 1 mjy，预计将来可以通过较高的角度分辨率的观测来检测。
Recently, the red giant V723 Mon is reported to have an unseen companion with a mass of $3.04\pm0.06M_{\odot}$, but question remains about whether it is a single (thus the so-called mass-gap) black hole or an inner binary of two more ordinary compact objects (neutron stars or white dwarfs). In this work, we estimate the X-ray emission by considering the wind-fed accretion from V723 Mon onto the compact companion. We analyze three different scenarios of the dark companion, i.e., a single black hole, binary neutron stars and binary of a neutron star and a white dwarf. We show that the single black hole is the most favored scenario. We also calculate the synchrotron emission from the bow shock caused by the interaction of the compact companion with the wind. We find this emission peaks at $\sim$ 0.1-1 GHz, with a flux density $\sim$ 1 mJy, which is expected to be detected by observations with higher angular resolution in the future.
