|Título||Limits on planets around pulsating white dwarf stars
Winget, Donald Earl
Thompson, S. E.
Chandler, Dean W.
Kepler, Souza Oliveira
|Abstract||We present limits on planetary companions to pulsating white dwarf stars. A subset of these stars exhibit extreme stability in the period 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 present limits on companions greater than a few Jupiter masses around a sample of 15 white dwarf stars as part of an ongoing survey. One star shows a variation in arrival time consistent with a 2MJ planet in a 4.5 yr orbit.We discuss other possible explanations for the observed signal and conclude that a planet is the most plausible explanation based on the data available.
|Contido em||The astrophysical journal. Chicago. Vol. 676, no. 1 (Mar. 2008), p. 573-583
[en] Planetary systems
[en] White dwarfs
|Tipo||Artigo de periódico
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