On the subseismic approximation for low-frequency gravity modes in spherically symmetric stars

Details On the subseismic approximation for low-frequency gravity modes in spherically symmetric stars On the subseismic approximation for low-frequency gravity modes in spherically symmetric stars

Jun 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...372..566s&link_type=abstract

Astronomy and Astrophysics, v.372, p.566-570 (2001)

Astronomy and Astrophysics

Astrophysics

1

Stars: Oscillations

Scientific paper

In a comparative study of the anelastic and the subseismic approximation for the description of low-frequency gravity modes in spherically symmetric stars, Dintrans & Rieutord (\cite{dintrans}) stress that the subseismic approximation is inconsistent in that the Eulerian perturbation of the mass density is negligible as is the Eulerian perturbation of the pressure and that consequently the equation of mass conservation is not satisfied. In this paper, attention is drawn to the asymptotic theory for low-degree, low-frequency gravity modes of spherically symmetric stars developed by Smeyers et al. (\cite{sme}). A main conclusion is that, in the main body of a star, the subseismic approximation results as a natural consequence of the lowest-order asymptotic approximation. At the same order of approximation, the Eulerian perturbation of the mass density is derived from the equation of mass conservation and is different from zero. It also follows from the lowest-order asymptotic approximation that the Eulerian perturbation of the pressure is different from zero in a small region near the star's surface, so that the subseismic approximation is not adequate in that region.

Affiliated with

Also associated with

No associations

Rating

On the subseismic approximation for low-frequency gravity modes in spherically symmetric stars 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 On the subseismic approximation for low-frequency gravity modes in spherically symmetric stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the subseismic approximation for low-frequency gravity modes in spherically symmetric stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1580034