DETECTION OF PHOTOMETRIC VARIATIONS IN THE sdBV Star JL 166

被引：5

作者：

Barlow, B. N. ^{[1
]}

Dunlap, B. H. ^{[1
]}

Lynas-Gray, A. E. ^{[2
]}

Clemens, J. C. ^{[1
]}

机构：

[1] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA

[2] Univ Oxford, Dept Phys, Oxford OX1 3RH, England

来源：

ASTRONOMICAL JOURNAL | 2009年 / 138卷 / 02期

基金：

美国国家科学基金会;

关键词：

stars: individual (JL 166); stars: oscillations; subdwarfs; SUBDWARF-B STARS; EC; 14026; STARS; HOT;

D O I：

10.1088/0004-6256/138/2/686

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the discovery of oscillations in the hot subdwarf B (sdB) star JL 166 from time-series photometry using the Goodman Spectrograph on the 4.1 m Southern Astrophysical Research Telescope. Previous spectroscopic and photometric observations place the star near the hot end of the empirical sdB instability strip and imply the presence of a cool companion. Amplitude spectra of the stellar light curve reveal at least 10 independent pulsation modes with periods ranging from 97 to 178 s and amplitudes from 0.9 to 4 mma. We adopt atmospheric parameters of T-eff = 34,350 K and log g = 5.75 from a model atmosphere analysis of our time-averaged, medium-resolution spectrum.

引用

页码：686 / 690

页数：5

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