Deviations from a uniform period spacing of gravity modes in a massive star

Pieter Degroote (), Conny Aerts, Annie Baglin, Andrea Miglio, Maryline Briquet, Arlette Noels, Ewa Niemczura, Josefina Montalban, Steven Bloemen, Raquel Oreiro, Maja Vučković, Kristof Smolders, Michel Auvergne, Frederic Baudin, Claude Catala and Eric Michel
Additional contact information
Pieter Degroote: Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium
Conny Aerts: Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium
Annie Baglin: LESIA, UMR8109, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris, 92195 Meudon, France
Andrea Miglio: Institut d'Astrophysique et de Géophysique de l'Université de Liege, Allée du 6 Aout 17, 4000 Liege, Belgium
Maryline Briquet: Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium
Arlette Noels: Institut d'Astrophysique et de Géophysique de l'Université de Liege, Allée du 6 Aout 17, 4000 Liege, Belgium
Ewa Niemczura: Astronomical Institute, Wroclaw University, Kopernika 11, 51-622 Wroclaw, Poland
Josefina Montalban: Institut d'Astrophysique et de Géophysique de l'Université de Liege, Allée du 6 Aout 17, 4000 Liege, Belgium
Steven Bloemen: Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium
Raquel Oreiro: Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium
Maja Vučković: Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium
Kristof Smolders: Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium
Michel Auvergne: LESIA, UMR8109, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris, 92195 Meudon, France
Frederic Baudin: Institut d'Astrophysique Spatiale (IAS), Batiment 121, F-91405, Orsay Cedex, France
Claude Catala: LESIA, UMR8109, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris, 92195 Meudon, France
Eric Michel: LESIA, UMR8109, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris, 92195 Meudon, France

Nature, 2010, vol. 464, issue 7286, 259-261

Abstract: A stellar interior probed The predictive power of current stellar evolution models is limited by the fact that little is known about the mixing process occurring at the stellar core. In theory, massive stars such as HD 50230 — seven times the mass of the Sun — should be ideal models for seismic probing of the stellar core via the distinct signature they leave in the gravity mode spectrum as it propagates from the core to the stellar surface. These gravity modes have now been detected observationally, in a continuous photometric light curve for HD 50230 collected with the CoRoT satellite. The data make it possible to estimate the extent of the convective core and constrain the location of the chemical transition zone at about 10% of the stellar radius.

Date: 2010
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DOI: 10.1038/nature08864

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