Article (Scientific journals)
Mixed modes in red giants: a window on stellar evolution
Mosser, B.; Benomar, O.; Belkacem, K. et al.
2014In Astronomy and Astrophysics, 572, p. 5
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Keywords :
stars: evolution; stars: oscillations; stars: interiors
Abstract :
[en] Context. The detection of oscillations with a mixed character in subgiants and red giants allows us to probe the physical conditions in their cores. <BR /> Aims: With these mixed modes, we aim at determining seismic markers of stellar evolution. <BR /> Methods: Kepler asteroseismic data were selected to map various evolutionary stages and stellar masses. Seismic evolutionary tracks were then drawn with the combination of the frequency and period spacings. <BR /> Results: We measured the asymptotic period spacing for 1178 stars at various evolutionary stages. This allows us to monitor stellar evolution from the main sequence to the asymptotic giant branch and draw seismic evolutionary tracks. We present clear quantified asteroseismic definitions that characterize the change in the evolutionary stages, in particular the transition from the subgiant stage to the early red giant branch, and the end of the horizontal branch. <BR /> Conclusions: The seismic information is so precise that clear conclusions can be drawn independently of evolution models. The quantitative seismic information can now be used for stellar modeling, especially for studying the energy transport in the helium-burning core or for specifying the inner properties of stars entering the red or asymptotic giant branches. Modeling will also allow us to study stars that are identified to be in the helium-subflash stage, high-mass stars either arriving or quitting the secondary clump, or stars that could be in the blue-loop stage. Table 1 is only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (ftp://130.79.128.5) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/572/L5">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/572/L5</A>
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Mosser, B.;  LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris, 92195, Meudon Cedex, France
Benomar, O.;  Department of Astronomy, The University of Tokyo, 113-033, Tokyo, Japan ; Sydney Institute for Astronomy, School of Physics, University of Sydney, Sydney, NSW, 2006, Australia
Belkacem, K.;  LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris, 92195, Meudon Cedex, France
Goupil, M. J.;  LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris, 92195, Meudon Cedex, France
Lagarde, N.;  School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK ; Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, Denmark
Michel, Etienne ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Dép. d'électric., électron. et informat. (Inst.Montefiore)
Lebreton, Y.;  GEPI, CNRS, Université Denis Diderot, Observatoire de Paris, 92195, Meudon Cedex, France ; Institut de Physique de Rennes, Université de Rennes 1, CNRS (UMR 6251), 35042, Rennes, France
Stello, D.;  Sydney Institute for Astronomy, School of Physics, University of Sydney, Sydney, NSW, 2006, Australia ; Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, Denmark
Vrard, M.;  LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris, 92195, Meudon Cedex, France
Barban, C.;  LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris, 92195, Meudon Cedex, France
Bedding, T. R.;  Sydney Institute for Astronomy, School of Physics, University of Sydney, Sydney, NSW, 2006, Australia ; Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, Denmark
Deheuvels, S.;  Université de Toulouse ; UPS-OMP, CNRS, IRAP, 14 avenue Edouard Belin, 31400, Toulouse, France
Chaplin, W. J.;  School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK ; Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, Denmark
De Ridder, J.;  Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D, 3001, Leuven, Belgium
Elsworth, Y.;  School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK ; Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, Denmark
Montalban, J.;  Universita di Padova, Italy
Noels-Grötsch, Arlette ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Ouazzani, R. M.;  Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, Denmark
Samadi, R.;  LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris, 92195, Meudon Cedex, France
White, T. R.;  Institut für Astrophysik, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, 37077, Göttingen, Germany
Kjeldsen, H.;  Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, Denmark)
More authors (11 more) Less
Language :
English
Title :
Mixed modes in red giants: a window on stellar evolution
Publication date :
01 December 2014
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Volume :
572
Pages :
L5
Peer reviewed :
Peer Reviewed verified by ORBi
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