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What CoRoT tells us about δ Scuti stars. Existence of a regular pattern and seismic indices to characterize stars
Michel, Eric; Dupret, Marc-Antoine; Reese, Daniel et al.
2017In EPJ Web of Conferences, 160, p. 03001
Peer reviewed
 

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Abstract :
[en] Inspired by the so appealing example of red giants, where going from a handful of stars to thousands revealed the structure of the eigenspectrum, we inspected a large homogeneous set of around 1860 δ Scuti stars observed with CoRoT. This unique data set reveals a common regular pattern which appears to be in agreement with island modes featured by theoretical non-perturbative treatments of fast rotation. The comparison of these data with models and linear stability calculations suggests that spectra can be fruitfully characterized to first order by a few parameters which might play the role of seismic indices for δ Scuti stars, as Δv and v[SUB]max[/SUB] do for red giants. The existence of this pattern offers an observational support for guiding further theoretical works on fast rotation. It also provides a framework for further investigation of the observational material collected by CoRoT ([1]) and Kepler ([2]). Finally, it sketches out the perspective of using δ Scuti stars pulsations for ensemble asteroseismology
Research Center/Unit :
STAR - Space sciences, Technologies and Astrophysics Research - ULiège
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Michel, Eric
Dupret, Marc-Antoine ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie
Reese, Daniel
Ouazzani, Rhita-Maria
Debosscher, Jonas
Hernández, Antonio García
Belkacem, Kevin
Samadi, Reza
Salmon, Sébastien ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie
Suarez, Juan Carlos
Forteza, Sebastia Barceló
Language :
English
Title :
What CoRoT tells us about δ Scuti stars. Existence of a regular pattern and seismic indices to characterize stars
Publication date :
01 October 2017
Event name :
Seismology of the Sun and the Distant Stars 2016 - Joint TASC2 & KASC9 Workshop – SPACEINN & HELAS8 Conference
Event date :
juillet 2016
Audience :
International
Journal title :
EPJ Web of Conferences
ISSN :
2101-6275
eISSN :
2100-014X
Publisher :
EDP Sciences, Les Ulis, France
Volume :
160
Pages :
03001
Peer reviewed :
Peer reviewed
Commentary :
160
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