论文标题
来自原始白矮人的不对称质量喷射对二元毫秒脉冲星的性质的影响
Impact of Asymmetrical Mass Ejection from Proto-White Dwarfs on the Properties of Binary Millisecond Pulsars
论文作者
论文摘要
二元毫秒脉冲星（BMSP）的标准形成理论预测，由于上一个传质阶段，由于潮汐相互作用而导致的有效轨道循环。因此，预计BMSP具有圆形轨道。但是，发现几个具有白矮人（WD）伴侣的怪异BMSP（EBMSP）对这张照片提出了质疑。特别是，最近的观察结果表明，从轨道角动量中，EBMSP J0955 $ - 6150的旋转角动量以角度$> 4.8^{\ rm \度} $倾斜。这是第一次为EBMSP推导倾斜角度，这为它们的形成机理提供了重要的线索。在原始WDS（所谓的热核火箭模型）中，轨道偏心率和倾斜角度都可以通过不对称的质量弹性来定性解释，但仍缺乏详细的研究。在本文中，我们模拟了由不对称的质量弹出对BMSP的性质引起的踢球的影响。我们发现，在合理的输入参数下，热核火箭模型可以潜在地解释EBMSP和正常BMSP的观察性特征。此外，我们的结果预测EBMSP的轨道周期范围很广（从少于一天到几百天），可以通过将来的观察来测试。
The standard formation theory of binary millisecond pulsars (BMSPs) predicts efficient orbital circularization due to tidal interaction during the previous mass transfer phase. Therefore, BMSPs are expected to have a circular orbit. However, the discovery of several eccentric BMSPs (eBMSPs) with a white dwarf (WD) companion has challenged this picture. In particular, recent observation reveals that the spin angular momentum of the eBMSP J0955$-$6150 is tilted at an angle $>4.8^{\rm \degree}$ from the orbital angular momentum. This is the first time that a tilt angle is deduced for eBMSPs, which provides an important clue to their formation mechanism. Both the orbital eccentricity and tilt angle could be qualitatively accounted for by asymmetrical mass ejection during thermonuclear flashes from proto-WDs (so-called the thermonuclear rocket model), but detailed studies are still lacking. In this paper, we simulate the impact of the kick caused by asymmetrical mass ejection on the properties of BMSPs. We find that the thermonuclear rocket model can potentially explain the observational characteristics of both eBMSPs and normal BMSPs under reasonable input parameters. In addition, our results predict a wide range of the orbital period (from less than one day to more than several hundred days) for eBMSPs, which can be tested by future observations.
