The Be/X-ray transient 4U 0115+63/V635 Cassiopeiae I. A consistent model

被引：143
作者：
Negueruela, I
Okazaki, AT
机构：
[1] Nuova Telespazio, SAX SDC, ASI, I-00131 Rome, Italy
[2] Liverpool John Moores Univ, Astrophys Res Inst, Liverpool L3 3AF, Merseyside, England
[3] Hokkai Gakuen Univ, Fac Engn, Toyohira Ku, Sapporo, Hokkaido 0628605, Japan
来源：
ASTRONOMY & ASTROPHYSICS | 2001年 / 369卷 / 01期
关键词：
stars : circumstellar matter; stars; emission-line; Be; stars : individual : 4U 0115+63; binaries : close; stars : neutron; X-ray : stars;
D O I：
10.1051/0004-6361:20010146
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present photometry and high SNR spectroscopy in the classification region of V635 Gas, the optical counterpart to the transient X-ray pulsar 4U 0115+63, taken at a time when the circumstellar envelope had disappeared. V635 Cas is classified as a B0.2Ve star at a distance of 7-8 kpc. We use the physical parameters derived from these observations and the orbit derived from X-ray observations to elaborate a model of the system based on the theory of decretion discs around Be stars. We show that the disc surrounding the Be star is truncated by the tidal/resonant interaction with the neutron star and cannot be in a steady state. This explains many of the observed properties of 4U 0115+63. In particular, because of this effect, under normal circumstances the neutron star cannot accrete from the disc, which explains the lack of regular type I outbursts from the source.
引用
收藏
页码：108 / 116
页数：9
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