CAN WE MEASURE THE ROTATION RATE INSIDE STARS

Citation
Mj. Goupil et al., CAN WE MEASURE THE ROTATION RATE INSIDE STARS, Astronomy and astrophysics, 305(2), 1996, pp. 487-497
Citations number
22
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ISSN journal
00046361
Volume
305
Issue
2
Year of publication
1996
Pages
487 - 497
Database
ISI
SICI code
0004-6361(1996)305:2<487:CWMTRR>2.0.ZU;2-V
Abstract
We examine the possibility of obtaining localized information on the r otation rate inside stars through asteroseismic observations from spac e. Attention is focused on delta Scuti stars where both opacity-driven and solar-like turbulence-driven modes may be detected. Plausible set s of modes with attendant rotational splitting data are deduced from t he results of linear stability calculations, effects of amplitude aver aging for modes with higher l's, and information gathered from ground- based photometry. For such sets of modes, optimally localized averagin g kernels are constructed, and we show that fairly detailed informatio n about the behavior of the rotation rate can be obtained only if opac ity-driven modes like those anticipated are indeed detected. The turbu lence-driven modes are essentially irrelevant for probing rotation.