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Non-adiabatic oscillations of fast-rotating stars: the example of Rasalhague

Mirouh, Giovanni M. Mirouh, Reese, Daniel R., Rieutord, Michel and Ballot, Jérôme (2017) Non-adiabatic oscillations of fast-rotating stars: the example of Rasalhague In: French Society of Astronomy & Astrophysics Paris, July 4-7, 2017 (SF2A 2017), 04-07 Jul 2017, Paris, France.

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Early-type stars generally tend to be fast rotators. In these stars, mode identification is very challenging as the effects of rotation are not well known. We consider here the example of α Ophiuchi, for which dozens of oscillation frequencies have been measured. We model the star using the two-dimensional structure code ESTER, and we compute both adiabatic and non-adiabatic oscillations using the TOP code. Both calculations yield very complex spectra, and we used various diagnostic tools to try and identify the observed pulsations. While we have not reached a satisfactory mode-to-mode identification, this paper presents promising early results.

Item Type: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
Mirouh, Giovanni M.
Reese, Daniel R.
Rieutord, Michel
Ballot, Jérôme
Date : 2017
Copyright Disclaimer : © Société Francaise d’Astronomie et d’Astrophysique (SF2A) 2017
Uncontrolled Keywords : Asteroseismology. Stars: rotation
Related URLs :
Depositing User : Clive Harris
Date Deposited : 08 Oct 2019 15:30
Last Modified : 08 Oct 2019 15:30

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