从广域光学巡天寻找具有自行的孤立中子星
Hunting isolated neutron stars with proper motions from wide-area optical surveys
摘要：
从出生地被踢出的高速中子星（HVNS），当它们遇到太阳附近时，可能会被识别为具有大的自行，并且可能具有大的视差。在本文中，我们研究的可行性狩猎孤立的HVNS在广域光学调查建模的NS光度的演变，考虑到自旋和热辐射。假设未来10年的VRO LSST观测，我们的模式计算预测，大约10个HVNS主要包括年龄为$10^4$ -$10^5$ yr的恒星和热发射的NS与$10^5$ - $10^6$ yr是可检测的。我们发现，一些NS的有效温度$< 5 \times 10^5$ K，这可能是错过了在当前和未来的X射线调查，也是可检测的。除了标准的中子星冷却模型，我们考虑一个暗物质加热模型。如果存在如此强烈的加热，我们发现可检测到的HVNS将显着更冷，即，$\lesssim 5\times 10^5$ K.因此，未来的光学观测将给出一个独特的NS样本，这可以提供必要的约束NS冷却和加热机制。此外，我们建议，提供HVNS样品的光学调查是有助于了解的内在踢速度分布的NS。
英文摘要：
High-velocity neutron stars (HVNSs) that were kicked out from their birth location can be potentially identified with their large proper motions, and possibly with large parallax, when they come across the solar neighborhood. In this paper, we study the feasibility of hunting isolated HVNSs in wide-area optical surveys by modeling the evolution of NS luminosity taking into account spin-down and thermal radiation. Assuming the upcoming 10-year VRO LSST observation, our model calculations predict that about 10 HVNSs mainly consisting of pulsars with ages of $10^4$--$10^5$ yr and thermally emitting NSs with $10^5$--$10^6$ yr are detectable. We find that a few NSs with effective temperature $< 5 \times 10^5$ K, which are likely missed in the current and future X-ray surveys, are also detectable. In addition to the standard neutron star cooling models, we consider a dark matter heating model. If such a strong heating exists we find that the detectable HVNSs would be significantly cooler, i.e., $\lesssim 5\times 10^5$ K. Thus, the future optical observation will give an unique NS sample, which can provide essential constraints on the NS cooling and heating mechanisms. Moreover, we suggest that providing HVNS samples with optical surveys is helpful for understanding the intrinsic kick-velocity distribution of NSs.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
