论文标题
黑寡妇同伴的大气流通
Atmospheric Circulation on Black Widow Companions
论文作者
论文摘要
我们提出了一个模型，用于二进制毫秒脉冲星（MSP）伴侣中的大气风循环，显示了光光曲线（LC）和径向速度（RV）如何对风流敏感，从而导致LC轨道相移，并对几个“ Spider” MSP观察到。光谱线的速度宽度为测量表面风速提供了额外的机会。作为示例，我们适合黑寡妇PULSAR J1959+2048和REDBACK PULSAR J2215+5135的光学数据；对于这两个物体而言，风加热模型（WH）在统计学上是强烈的首选，而不是直接加热（DH），尽管后者甚至更适合加热点。通常，WH效果倾向于增加推断的轨道倾斜$ i $，并减少推断的伴随质量径向速度振幅$ k_ \ mathrm {c} $;两种效应都会降低推断的中子星质量。即使有这样的减少，我们也发现了两个中子星的大量群众：$ 2.18 \ pm0.09m_ \ odot $和$ 2.28^{+0.10} _ { - 0.09} m_ \ odot $（对于散装热流动的散装热流; suppersonic photoppheric photopheric photopheric thermpherppheric风能都可以降低这些价值）。这些是已知的最高质量之一，我们改进的建模增强了人们对了解状态密集物质方程很重要的信心。
We present a model for atmospheric wind circulation in binary millisecond pulsar (MSP) companions, showing how the optical light curve (LC) and radial velocities (RV) are sensitive to the wind flow, causing LC orbital phase shifts and asymmetries, as observed for several `spider' MSP. Velocity widths of spectral lines offer additional opportunities for measuring surface wind speed. As examples, we fit optical data for a black widow pulsar J1959+2048 and a redback pulsar J2215+5135; the wind heating models (WH) are statistically strongly preferred over direct heating (DH) for both objects, although the latter is even better fit with a heated spot. In general, WH effects tend to increase the inferred orbital inclination $i$ and decrease the inferred companion center-of-mass radial velocity amplitude $K_\mathrm{c}$; both effects decrease the inferred neutron star mass. Even with such a decrease, we find large masses for the two neutron stars: $2.18\pm0.09M_\odot$ and $2.28^{+0.10}_{-0.09}M_\odot$, respectively (for the modest surface speeds fit from the bulk heat flow; supersonic photospheric winds can slightly change these values). These are among the highest masses known, and our improved modeling increases confidence that the results are important for understanding the dense matter equation of state.
