Limits on Planets Around Pulsating White Dwarf Stars

被引：0
作者：
Mullally, Fergal [1 ]
Winget, D. E. [2 ]
Degennaro, Steven [2 ]
Jeffery, Elizabeth [2 ]
Thompson, S. E. [3 ]
Chandler, Dean [4 ]
Kepler, S. O. [5 ]
机构：
[1] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA
[2] Univ Texas Austin, Dept Astron, Austin, TX 78712 USA
[3] Univ Delaware, Dept Phys, Delaware, OH 19716 USA
[4] Meyer Observ, Clifton Pk, NY 76530 USA
[5] Univ Fed Rio Grande do Sul, Inst Fis, BR-91501900 Porto Alegre, RS, Brazil
来源：
EXTREME SOLAR SYSTEMS | 2008年 / 398卷
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D O I：
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中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present results from an on-going search for planetary companions around pulsating white dwarf stars. A subset of these stars exhibit extreme stability in the amplitude and phase of some of their pulsation modes; a planet can be detected around such a star by searching for periodic variations in the arrival time of these pulsations. We show limits on companions greater than a few Jupiter masses for two stars from our initial sample of 15. One star shows a variation in arrival time consistent with a 2 M-J planet in a 4.5 year orbit.
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页码：163 / +
页数：2
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