Gravitational waves emitted by solar-type stars excited by orbiting planets

Details Gravitational waves emitted by solar-type stars excited by orbiting planets Gravitational waves emitted by solar-type stars excited by orbiting planets

2000-11-20

arxiv.org/abs/astro-ph/0011364v2

Phys.Rev. D63 (2001) 064031

Astronomy and Astrophysics

Astrophysics

19 pages, 1 figure, submitted to Phys. Rev. D. Typo in formula (5.4) corrected

Scientific paper

10.1103/PhysRevD.63.064031

The possibility of exciting the g-modes of a solar-type star as a consequence of the gravitational interaction with a close companion (a planet or a brown dwarf) is studied by a perturbative approach. The amplitude of the emitted gravitational wave is computed and compared with the quadrupole emission of the system, showing that in some cases it can be considerably larger. The effects of radiation reaction are considered to evaluate the timescale of the emission process, and a Roche lobe analysis is used to establish the region where the companion can orbit without being disrupted by tidal interactions with the star.

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