Far-ultraviolet spectral analysis of the prototype nova-like variable VY sculptoris from the high state to the low state

被引：9
|
作者：
Hamilton, Ryan T. [1 ]
Sion, Edward M. [2 ]
机构：
[1] New Mexico State Univ, Dept Astron, Las Cruces, NM 88003 USA
[2] Villanova Univ, Dept Astron & Astrophys, Villanova, PA 19085 USA
来源：
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC | 2008年 / 120卷 / 864期
关键词：
D O I：
10.1086/528939
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The prototype nova-like variable VY Sculptoris was observed by the IUE during four different optical brightness states of the system. The far-ultraviolet (FUV) flux level from the highest state to the lowest state declines by a factor of 28. We have carried out model accretion disk and white dwarf atmosphere fitting to the spectra. The corresponding accretion rates range from M=8 x 10(-9) M(circle dot)yr(-1) at the highest FUV flux level down to M=1: 9 x 10(-10) M(circle dot)yr(-1) at the lowest flux level. We report tentative evidence for the detection of the underlying white dwarf with T-eff =45, 000 K in the spectrum with the lowest flux level.
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收藏
页码：165 / 169
页数：5
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