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arXiv 1012.4705astro-ph.SR
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星团的光度函数

The luminosity function of cluster pulsars

Manjari Bagchi, Duncan R. Lorimer

摘要:

用单次和双次幂律拟合观测到的光度分布,研究了球状星团中毫秒双星的光度。我们使用模拟来模拟所观察到的分布作为Terzan 5的一些父分布的较亮部分,并试图找到一个模型,该模型同时符合所观察到的漫射无线电通量,总预测的恒星数和观测到的光度分布。我们发现,对数正态分布和幂律分布的参数范围很宽,给出了这样的好模型。球状星团中毫秒双星的光度分布与正常的盘状双星没有明显的区别。

英文摘要:

We study luminosities of millisecond pulsars in globular clusters by fitting the observed luminosity distribution with single and double power laws. We use simulations to model the observed distribution as the brighter part of some parent distribution for Terzan 5 and try to find a model which simultaneously agrees with the observed diffuse radio flux, total predicted number of pulsars and observed luminosity distribution. We find that wide ranges of parameters for log-normal and power-law distributions give such good models. No clear difference between the luminosity distributions of millisecond pulsars in globular clusters and normal disk pulsars was seen.

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