A Gravitational Redshift Determination of the Mean Mass of DBA White Dwarfs

被引：0
作者：
Falcon, Ross E. [1 ]
Winget, D. E. [1 ]
Montgomery, M. H. [1 ]
Williams, Kurtis A. [2 ]
机构：
[1] Univ Texas Austin, Dept Astron, RLM 15308, Austin, TX 78712 USA
[2] Texas A&M Univ Commerce, Dept Phys & Astron, Commerce, TX 78712 USA
来源：
17TH EUROPEAN WHITE DWARF WORKSHOP | 2010年 / 1273卷
基金：
美国国家科学基金会;
关键词：
white dwarfs; techniques: radial velocities; techniques: spectroscopic; NEUTRAL HELIUM; SPY-PROJECT; STARS; SPECTRA; IA;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We measure apparent velocities (v(app)) of the H alpha and H beta Balmer line cores for 16 helium-dominated white dwarfs (WDs) using optical spectra taken for the European Southern Observatory SN Ia progenitor survey (SPY). Following the gravitational redshift method employed by Falcon et al. [1], we find a mean apparent velocity of (v(app)) = 39.58 +/- 4.41 km s(-1) and use it to derive a mean mass of < M > = 0.701(-0.046)(+0.042) M-circle dot. Though the sample is small, the mean mass appears to be larger than the mean mass of DAs derived using the same method [0.647(-0.014)(+0.013) M-circle dot, 1]
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页码：13 / 18
页数：6
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