论文标题
通过积聚引起的崩溃从双白矮人合并中形成单个中子明星
The formation of single neutron-stars from double white-dwarf mergers via accretion-induced collapse
论文作者
论文摘要
双白矮人（WDS）的合并可能会产生吸积诱导的崩溃（AIC）并形成单个中子星（NSS）的事件。同时，还值得注意的是，最近提出的WD+HE子巨头方案对大规模双WD的生产产生了重大贡献，其中主要WD通过从He Subiant Companion中积累了丰富的He He He材料来增长质量。在这项工作中，我们旨在通过考虑经典场景以及subiant情景对形成双WDS的形成，研究来自双WD合并的AIC事件的二元种群合成（BPS）特性。首先，我们提供了通过双WD合并方案生产AIC事件的WD+HE STAR系统的密集且大型的模型网格。其次，我们执行了几组BPS计算，以获取银河系中的速率和单个NS数。我们发现，银河系中双WD合并的AIC事件发生率在1.4-8.9*10^10^-3 -3 Yr^-1范围内，所有一个/co wd+一个/co WD合并的范围为0.3-3.8*10^-3 yr^-1，当时我还没有发现双头cow的事件。 0.328*10^7至1.072*10^8。产生AIC事件的双WD的呼叫质量分布在0.55-1.25 msun范围内。我们估计，未来空间的重力波检测器能够观察到超过一半用于产生AIC事件的双WDS。
The merging of double white dwarfs (WDs) may produce the events of accretion-induced collapse (AIC) and form single neutron stars (NSs). Meanwhile, it is also notable that the recently proposed WD+He subgiant scenario has a significant contribution to the production of massive double WDs, in which the primary WD grows in mass by accreting He-rich material from a He subgiant companion. In this work, we aim to study the binary population synthesis (BPS) properties of AIC events from the double WD mergers by considering the classical scenarios and also the contribution of theWD+He subgiant scenario to the formation of double WDs. First, we provided a dense and large model grid of WD+He star systems for producing AIC events through the double WD merger scenario. Secondly, we performed several sets of BPS calculations to obtain the rates and single NS number in our Galaxy. We found that the rates of AIC events from the double WD mergers in the Galaxy are in the range of 1.4-8.9*10^-3 yr^-1 for all ONe/CO WD+ONe/CO WD mergers, and in the range of 0.3-3.8*10^-3 yr^-1 when double COWD mergers are not considered.We also found that the number of single NSs from AIC events in our Galaxy may range from 0.328*10^7 to 1.072*10^8. The chirp mass of double WDs for producing AIC events distribute in the range of 0.55-1.25 Msun. We estimated that more than half of doubleWDs for producing AIC events are capable to be observed by the future space-based gravitational wave detectors.
