Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· arXiv e-print (arXiv:astro-ph/0509403)
· References in the article
· Citations to the Article (16) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (1)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Space- and Ground-based Pulsation Data of η Bootis Explained with Stellar Models Including Turbulence
Authors:
Straka, Christian W.; Demarque, Pierre; Guenther, D. B.; Li, Linghuai; Robinson, Frank J.
Affiliation:
AA(Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520-8101 , , .), AB(Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520-8101 , , .), AC(Department of Astronomy and Physics, Institute for Computational Astrophysics, Saint Mary's University, Halifax, NS B3H 3C3, Canada; .), AD(Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520-8101 , , .), AE(Department of Geology and Geophysics, Yale University, New Haven, CT 06520-8101 .)
Publication:
The Astrophysical Journal, Volume 636, Issue 2, pp. 1078-1086. (ApJ Homepage)
Publication Date:
01/2006
Origin:
UCP
ApJ Keywords:
Stars: Evolution, stars: individual (η Boo), Stars: Oscillations, Turbulence
DOI:
10.1086/498057
Bibliographic Code:
2006ApJ...636.1078S

Abstract

The space telescope MOST is now providing us with extremely accurate low-frequency p-mode oscillation data for the star η Boo. We demonstrate in this paper that these data, when combined with ground-based measurements of the high-frequency p-mode spectrum, can be reproduced with stellar models that include the effects of turbulence in their outer layers. Without turbulence, the l=0 modes of our models deviate from either the ground-based or the space data by about 1.5-4 μHz. This discrepancy can be completely removed by including turbulence in the models, and we can exactly match 12 out of 13 MOST frequencies that we identified as l=0 modes, in addition to 13 out of 21 ground-based frequencies within their observational 2 σ tolerances. The better agreement between model frequencies and observed frequencies depends for the most part on the turbulent kinetic energy that was taken from a three-dimensional convection simulation for the Sun.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints