Spectroscopy of four cataclysmic variables with periods above 7 hours

被引：17
|
作者：
Peters, CS [1 ]
Thorstensen, JR [1 ]
机构：
[1] Dartmouth Coll, Dept Phys & Astron, Wilder Lab 6127, Hanover, NH 03755 USA
来源：
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC | 2005年 / 117卷 / 838期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1086/497384
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present spectroscopy of four cataclysmic variables. Using radial velocity measurements, we find orbital periods P-orb for the first time: for GY Hya, 0.347230( 9) days, for SDSS J204448 - 045929, 1.68( 1) days, for V392 Hya, 0.324952( 5) days, and for RX J1951.7 + 3716, 0.492( 1) days. We also detect the spectra of the secondary stars, estimate their spectral types, and derive distances based on surface brightness and Roche lobe constraints.
引用
收藏
页码：1386 / 1393
页数：8
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