Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-03-17
Mon.Not.Roy.Astron.Soc. 318 (2000) 1
Astronomy and Astrophysics
Astrophysics
8 pages, 2 figures, to be published in MNRAS
Scientific paper
10.1046/j.1365-8711.2000.03536.x
A qualitative study of the surface trapping of low-frequency non-radial g-modes in rotating early-type stars is undertaken within the Cowling, adiabatic and traditional approximations. It is demonstrated that, at frequencies below a cut-off, waves cannot be fully trapped within the star, and will leak through the surface. Expressions for the cut-off frequency are derived in both the non-rotating and rotating cases; it is found from these expressions that the cut-off frequency increases with the rotation rate for all but prograde sectoral modes. The results are of possible relevance to the 53 Per and SPB classes of variable star, which exhibit pulsation frequencies of the same order of magnitude as the cut-off frequencies found for the stellar model. It is suggested that observations either of an upper limit on variability periods (corresponding to the cut-off), or of line-profile variations due to leaking modes, may permit asteroseismological studies of the outer layers of these systems.
No associations
LandOfFree
Surface trapping and leakage of low-frequency g-modes in rotating early-type stars -- I. Qualitative analysis 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 Surface trapping and leakage of low-frequency g-modes in rotating early-type stars -- I. Qualitative analysis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface trapping and leakage of low-frequency g-modes in rotating early-type stars -- I. Qualitative analysis will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-487930