Excitation of non-radial stellar oscillations by gravitational waves: a first model

Details Excitation of non-radial stellar oscillations by gravitational waves: a first model Excitation of non-radial stellar oscillations by gravitational waves: a first model

2010-06-24

arxiv.org/abs/1006.4803v2

Mon. Not. R. Astron. Soc. 408 (2010) 1742

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

8 pages, to be published in MNRAS (in press); corrected typos

Scientific paper

10.1111/j.1365-2966.2010.17240.x

The excitation of solar and solar-like g modes in non-relativistic stars by arbitrary external gravitational wave fields is studied starting from the full field equations of general relativity. We develop a formalism that yields the mean-square amplitudes and surface velocities of global normal modes excited in such a way. The isotropic elastic sphere model of a star is adopted to demonstrate this formalism and for calculative simplicity. It is shown that gravitational waves solely couple to quadrupolar spheroidal eigenmodes and that normal modes are only sensitive to the spherical component of the gravitational waves having the same azimuthal order. The mean-square amplitudes in case of stationary external gravitational waves are given by a simple expression, a product of a factor depending on the resonant properties of the star and the power spectral density of the gravitational waves' spherical accelerations. Both mean-square amplitudes and surface velocities show a characteristic R^8-dependence (effective R^2-dependence) on the radius of the star. This finding increases the relevance of this excitation mechanism in case of stars larger than the Sun.

Affiliated with

Also associated with

No associations

Rating

Excitation of non-radial stellar oscillations by gravitational waves: a first model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Excitation of non-radial stellar oscillations by gravitational waves: a first model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Excitation of non-radial stellar oscillations by gravitational waves: a first model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-676158