AI 中文总结
该研究通过星族合成模拟低质量双星中的风吸积中子星系统，发现多数系统在几吉年内产生暗淡X射线源，且仅在公共包层效率高时才能形成少量高速双星。
AI 中文摘要
我们对包含一颗未充满其洛希瓣的低质量主序伴星的中子星双星系统进行了星族合成建模。预计银河系中约有$10^5$个这样的系统。在大多数此类系统中，中子星预计将在几吉年内开始吸积恒星风物质，导致出现一个暗淡的X射线源。这一比例的确切值主要取决于螺旋桨自转减慢的效率、恒星风的特性以及公共包层效率。此类系统中的中子星大多形成于电子俘获超新星，因此它们获得较低的原生速度。由于这个原因，这类双星的质心速度也较低。只有在公共包层效率较高（$\alpha_\mathrm{CE}\gtrsim 3$）的情况下，才能在核坍缩超新星中产生几十个长寿命的高速双星。
英文摘要
We perform population synthesis modeling of neutron star binary systems containing a low-mass main-sequence companion underfilling its Roche lobe. About $10^5$ such systems are expected to exist in the Milky Way. In the majority of such systems, NSs are expected to start accreting the stellar wind matter within a few Gyr, resulting in the appearance of a dim X-ray source. The exact value of this fraction mainly depends on the efficiency of the propeller spin-down, properties of the stellar wind, and common envelope efficiency. Mostly, NSs in such systems are formed in electron capture supernovae. Thus, they obtain a low natal kick. Due to this, the center-of-mass velocities of such binaries are low, too. Only in the case of high common envelope efficiency ($α_\mathrm{CE}\gtrsim 3$), a few tens of long-lived high-velocity binaries can be produced in core-collapse supernovae.
Comments15 pages, 5 figures, submitted to New Astronomy
