Can we measure the rotation rate inside stars ?

Marie Jo Goupil, W. A. Dziembowski, Philip R. Goode, Eric Michel

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

We examine the possibility of obtaining localized information on the rotation rate inside stars through asteroseismic observations from space. Attention is focused on δ Scuti stars where both opacity-driven and solar-like turbulence-driven modes may be detected. Plausible sets of modes with attendant rotational splitting data are deduced from the results of linear stability calculations, effects of amplitude averaging for modes with higher l's, and information gathered from ground-based photometry. For such sets of modes, optimally localized averaging kernels are constructed, and we show that fairly detailed information about the behavior of the rotation rate can be obtained only if opacity-driven modes like those anticipated are indeed detected. The turbulence-driven modes are essentially irrelevant for probing rotation.

Original languageEnglish (US)
Pages (from-to)487-497
Number of pages11
JournalAstronomy and Astrophysics
Volume305
Issue number2
StatePublished - Jan 10 1996

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Stars: oscillations
  • Stars: rotation
  • Stars: δ Scuti

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