A new asteroseismic diagnostic for internal rotation in γ Doradus stars
Article
Article Title | A new asteroseismic diagnostic for internal rotation in γ Doradus stars |
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ERA Journal ID | 1074 |
Article Category | Article |
Authors | Ouazzani, Rhita-Maria (Author), Salmon, S. J. A. J. (Author), Antoci, V. (Author), Bedding, T. R. (Author), Murphy, S. J. (Author) and Roxburgh, I. W. (Author) |
Journal Title | Monthly Notices of the Royal Astronomical Society |
Journal Citation | 465 (2), pp. 2294-2309 |
Number of Pages | 16 |
Year | 2016 |
Publisher | Oxford University Press |
Place of Publication | United Kingdom |
ISSN | 0035-8711 |
1365-2966 | |
Digital Object Identifier (DOI) | https://doi.org/10.1093/mnras/stw2717 |
Web Address (URL) | https://academic.oup.com/mnras/article/465/2/2294/2417441 |
Abstract | With four years of nearly continuous photometry from Kepler, we are finally in a good position to apply asteroseismology to γ Doradus stars. In particular, several analyses have demonstrated the possibility to detect non-uniform period spacings, which have been predicted to be directly related to rotation. In this paper, we define a new seismic diagnostic for rotation in γ Doradus stars which are too rapidly rotating to present rotational splittings. Based on the non-uniformity of their period spacings, we define the observable Σ as the slope of the period spacing when plotted as a function of period. We provide a one-to-one relation between this observable Σ and the internal rotation, which applies widely in the instability strip of γ Doradus stars. We apply the diagnostic to a handful of stars observed by Kepler. Thanks to g modes in γ Doradus stars, we are now able to determine the internal rotation of stars on the lower main sequence, which is still not possible for Sun-like stars. |
Keywords | Asteroseismology; Stars: interiors; Stars: oscillations; Stars: rotation; Astrophysics - Solar and Stellar Astrophysics |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
Byline Affiliations | Aarhus University, Denmark |
University of Paris, France | |
Queen Mary University of London, United Kingdom | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q73v8/a-new-asteroseismic-diagnostic-for-internal-rotation-in-doradus-stars
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