论文标题
高度紧凑的中子星的光曲线具有斑点尺寸效果
Light curves from highly compact neutron stars with spot size effect
论文作者
论文摘要
我们系统地检查了从一个非常高的紧凑性的缓慢旋转中子恒星上的单个热点的光曲线，其中所谓的无形区域不存在。特别是，我们采用了三种不同形状的热点，并考虑了热点对光曲线的有限尺寸效果。然后，我们发现，当较小区域的热点与观察者的另一侧交叉时，通量的变亮发生了，随着热点的面积降低，亮度变得更强。由于这种亮点仅在热点的一部分越过观察者的另一侧发生时发生，因此，如果观察到明亮的亮点，则可能会限制中子星的几何形状，即倾斜角，旋转轴和正常矢量之间的倾斜角，旋转轴和正常矢量之间的组合，以及热点的开头。此外，通过对光曲线中的这种亮度进行计数，人们可能会知道有多少个狭窄的热点和/或斑点较小的斑点越过观察者的另一侧。
We systematically examine light curves from a single hot spot on a slowly rotating neutron star with very high compactness, where the so-called invisible zone does not exist. In particular, we adopt three different shapes of hot spot and take into account the finite size effect of hot spot on the light curves. Then, we find that the brightening of flux occurs when the hot spot with small area crosses the opposite side to the observer, where the brightening becomes stronger as the area of hot spot decreases. Since this brightening happens only when a part of hot spot crosses the opposite side to the observer, one may constrain the neutron star geometry, i.e., the combination of an inclination angle, angle between the rotational axis and normal vector at the center of hot spot, and the opening angle of hot spot, if the brightening would be observed. In addition, by counting such a brightening in the light curves, one may know how many narrow bands of hot spot and/or spots with small area cross the opposite side to the observer.
