THE PHOTOSPHERIC TEMPERATURE AND METAL ABUNDANCE OF THE COMPACT STAR H1504 + 65

被引：5

作者：

BARSTOW, MA

TWEEDY, RW

机构：

[1] X-ray Astronomy Group, Physics Department, University of Leicester, University Road, Leicester

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1990年 / 242卷 / 03期

关键词：

D O I：

10.1093/mnras/242.3.484

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a new analysis of an EXOSAT low-energy telescope observation of the hot compact star HI504 + 65. Earlier results had failed to take into account the large point-spread function produced by the boron filter, and hence the count rate had been underestimated by a large factor. On comparing the data with a new grid of model atmospheres containing CNO metals we are able to estimate the temperature, line-of-sight column density and photospheric elemental abundances for the star. Contrary to earlier suggestions it appears that H1504 + 65 is not devoid of He and may also have significant H present in its photosphere. These results are consistent with H1504 + 65 being the hottest member of the PG1159-035 spectroscopic group of degenerate stars and not a peculiar individual star. © 1990 Oxford University Press. All rights reserved.

引用

页码：484 / 488

页数：5

共 10 条

[1] THE DETECTION OF PHOTOSPHERIC X-RAY PULSATIONS FROM PG 1159-035 WITH EXOSAT [J].