Bondi-Hoyle-Lyttleton accretion model for low-luminosity X-ray sources in globular clusters

被引：25

作者：

Pfahl, E ^{[1
]}

Rappaport, S ^{[1
]}

机构：

[1] MIT, Dept Phys, Cambridge, MA 02139 USA

来源：

ASTROPHYSICAL JOURNAL | 2001年 / 550卷 / 01期

关键词：

globular clusters : general; stars : neutron; X-rays : general;

D O I：

10.1086/319741

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a new model for low-luminosity X-ray sources in globular clusters, with L-X less than or similar to 10(34) ergs s(-1). The model we propose is that of a single neutron star accreting from cluster gas that has accumulated as a natural product of stellar evolution. An analytic luminosity function is derived under the assumption that the speed distribution of neutron stars in the central region of a cluster is described by a Maxwellian, and that the density and temperature of the gas are uniform. Predictions of the model and implications for the gas content of globular clusters are discussed.

引用

页码：172 / 176

页数：5

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