On the Wolf-Rayet counterpart to IC 10 X-1

被引：32

作者：

Clark, JS

Crowther, PA

机构：

[1] UCL, Dept Phys & Astron, London WC1E 6BT, England

[2] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England

来源：

ASTRONOMY & ASTROPHYSICS | 2004年 / 414卷 / 03期

关键词：

galaxies : individual : IC 10; stars : Wolf Rayet; X-rays : binaries;

D O I：

10.1051/0004-6361:20031762

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Recent CHANDRA observations of the starburst galaxy IC 10 have resulted in an improved position for the bright (>10(38) erg s(-1)) X-ray source IC 10 X-1. We discuss arguments in favour of the Wolf-Rayet star #17-A from Massey et al. and Crowther et al. being the optical counterpart; alternative possibilities are also considered. We discuss the properties of Massey et al. 17-A, finding it to be amongst the most luminous - and hence massive - WNE stars known and make comparisons with Cyg X-3. Finally we examine evolutionary constraints relating to the nature of the compact companion, finding that a putative neutron star companion would place stringent constraints on the minimum progenitor mass required to form a black hole in close binaries.

引用

页码：L45 / L48

页数：4

共 22 条

[1]

BAUER FE, 2003, IN PRESS APJL

[2]

Borissova J, 2000, ASTRON ASTROPHYS, V363, P130

[3] ROSAT HRI observations of the local group galaxies IC 10, NGC 147 and NGC 185 [J].