X-RAY-SPECTRA FROM NEUTRON-STARS ACCRETING AT LOW RATES

被引：125

作者：

ZAMPIERI, L ^{[1
]}

TUROLLA, R ^{[1
]}

ZANE, S ^{[1
]}

TREVES, A ^{[1
]}

机构：

[1] UNIV PADUA,DEPT PHYS,I-35131 PADUA,ITALY

来源：

ASTROPHYSICAL JOURNAL | 1995年 / 439卷 / 02期

关键词：

ACCRETION; ACCRETION DISKS; RADIATION MECHANISMS; NONTHERMAL; STARS; NEUTRON; X-RAYS;

D O I：

10.1086/175223

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The spectral properties of X-ray radiation produced in a static atmosphere around a neutron star accreting at very low rates are investigated. Previous results by Alme & Wilson are extended to the range 10(-7) less than or equal to L/L(Edd) less than or equal to 10(-3) to include the typical luminosities, L similar to 10(31)-10(32) ergs s(-1), expected from isolated neutron stars accreting the interstellar medium. The emergent spectra show an overall hardening with respect to the blackbody at the neutron star effective temperature in addition to a significant excess over the Wien tail. The relevance of present results in connectin with the observability of low-luminosity X-ray sources is briefly discussed.

引用

页码：849 / 853

页数：5

共 19 条

[1] X-RAY-EMISSION FROM A NEUTRON STAR ACCRETING MATERIAL [J].