论文标题
通过积聚引起的白色矮人倒塌的长轨道时期的毫秒脉冲星形成
Formation of millisecond pulsars with long orbital periods by accretion-induced collapse of white-dwarfs
论文作者
论文摘要
已经提出了积聚引起的大量白矮人（WDS）的崩溃（AIC），这是形成中子星（NS）系统的重要方法。从红色巨星（RG）恒星中积聚H富材料的氧气（一个）WD可能会经历AIC过程，最终产生毫秒的脉冲星（MSP），称为RG供体通道。先前的研究表明，此通道只能在轨道周期$> 500 \，\ rm d $中解释MSP。值得注意的是，最近观察结果发现了更多具有宽轨道（$ 60-500 \，\ rm d $）的MSP，但它们的起源仍然高度不确定。在当前的工作中，通过对质量转移过程采用绝热幂律假设，我们以系统的方式通过RG供体通道进行了大量的完整二进制进化计算，以通过RG供体通道形成MSP。我们发现，该通道可以有助于观察到的MSP，其轨道周期为50-1200 \，{\ rm d} $的范围内，并且几乎所有带有宽轨道的MSP都可以在WD Companion质量质量与轨道周期图中覆盖。目前的工作表明，AIC过程提供了一种可以用宽轨道形成MSP的可行方法。
Accretion-induced collapse (AIC) of massive white-dwarfs (WDs) has been proposed as an important way for the formation of neutron star (NS) systems. An oxygen-neon (ONe) WD that accretes H-rich material from a red-giant (RG) star may experience the AIC process, eventually producing millisecond pulsars (MSPs), known as the RG donor channel. Previous studies indicate that this channel can only account for MSPs with orbital periods $>500\,\rm d$. It is worth noting that some more MSPs with wide orbits ($60-500\,\rm d$) have been detected by recent observations, but their origin is still highly uncertain. In the present work, by employing an adiabatic power-law assumptions for the mass-transfer process, we performed a large number of complete binary evolution calculations for the formation of MSPs through the RG donor channel in a systematic way. We found that this channel can contribute to the observed MSPs with orbital periods in the range of $50-1200\,{\rm d}$, and almost all the observed MSPs with wide orbits can be covered by this channel in the WD companion mass versus orbital period diagram. The present work indicates that the AIC process provides a viable way to form MSPs with wide orbits.
