The excitation of solar-like oscillations ...
Type de document :
Compte-rendu et recension critique d'ouvrage
DOI :
Titre :
The excitation of solar-like oscillations in a $\delta$ Sct star by efficient envelope convection
Auteur(s) :
Antoci, V. [Auteur correspondant]
Institute for Astronomy [Vienna]
Handler, G. [Auteur]
Institute for Astronomy [Vienna]
Copernicus Astronomical Center of the Polish Academy of Sciences [CAMK]
L. Campante, T. [Auteur]
Centro de Astrofísica da Universidade do Porto [CAUP]
Department of Physics and Astronomy [Aarhus]
O. Thygesen, A. [Auteur]
Department of Physics and Astronomy [Aarhus]
Moya, A. [Auteur]
Centro de Astrobiologia [Madrid] [CAB]
Kallinger, T. [Auteur]
Institute for Astronomy [Vienna]
Stello, D. [Auteur]
Sydney Institute for Astronomy [SIfA]
Grigahcène, A. [Auteur]
Centro de Astrofísica da Universidade do Porto [CAUP]
Kjeldsen, H. [Auteur]
Department of Physics and Astronomy [Aarhus]
R. Bedding, T. [Auteur]
Sydney Institute for Astronomy [SIfA]
Lüftinger, T. [Auteur]
Institute for Astronomy [Vienna]
Christensen-Dalsgaard, J. [Auteur]
Department of Physics and Astronomy [Aarhus]
Catanzaro, G. [Auteur]
INAF - Osservatorio Astrofisico di Catania [OACT]
Frasca, A. [Auteur]
INAF - Osservatorio Astrofisico di Catania [OACT]
de Cat, P. [Auteur]
Solar Influences Data Analysis Center [Brussels] [SIDC]
Uytterhoeven, K. [Auteur]
Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
Bruntt, H. [Auteur]
Department of Physics and Astronomy [Aarhus]
Houdek, G. [Auteur]
Institute for Astronomy [Vienna]
W. Kurtz, D. [Auteur]
Jeremiah Horrocks Institute for Mathematics, Physics and Astronomy [Preston]
Lenz, P. [Auteur]
Copernicus Astronomical Center of the Polish Academy of Sciences [CAMK]
Kaiser, Andreas [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
van Cleve, J. [Auteur]
SETI Institute
Allen, C. [Auteur]
NASA Ames Research Center [ARC]
Clarke, B.D. [Auteur]
SETI Institute
Institute for Astronomy [Vienna]
Handler, G. [Auteur]
Institute for Astronomy [Vienna]
Copernicus Astronomical Center of the Polish Academy of Sciences [CAMK]
L. Campante, T. [Auteur]
Centro de Astrofísica da Universidade do Porto [CAUP]
Department of Physics and Astronomy [Aarhus]
O. Thygesen, A. [Auteur]
Department of Physics and Astronomy [Aarhus]
Moya, A. [Auteur]
Centro de Astrobiologia [Madrid] [CAB]
Kallinger, T. [Auteur]
Institute for Astronomy [Vienna]
Stello, D. [Auteur]
Sydney Institute for Astronomy [SIfA]
Grigahcène, A. [Auteur]
Centro de Astrofísica da Universidade do Porto [CAUP]
Kjeldsen, H. [Auteur]
Department of Physics and Astronomy [Aarhus]
R. Bedding, T. [Auteur]
Sydney Institute for Astronomy [SIfA]
Lüftinger, T. [Auteur]
Institute for Astronomy [Vienna]
Christensen-Dalsgaard, J. [Auteur]
Department of Physics and Astronomy [Aarhus]
Catanzaro, G. [Auteur]
INAF - Osservatorio Astrofisico di Catania [OACT]
Frasca, A. [Auteur]
INAF - Osservatorio Astrofisico di Catania [OACT]
de Cat, P. [Auteur]
Solar Influences Data Analysis Center [Brussels] [SIDC]
Uytterhoeven, K. [Auteur]
Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
Bruntt, H. [Auteur]
Department of Physics and Astronomy [Aarhus]
Houdek, G. [Auteur]
Institute for Astronomy [Vienna]
W. Kurtz, D. [Auteur]
Jeremiah Horrocks Institute for Mathematics, Physics and Astronomy [Preston]
Lenz, P. [Auteur]
Copernicus Astronomical Center of the Polish Academy of Sciences [CAMK]
Kaiser, Andreas [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
van Cleve, J. [Auteur]
SETI Institute
Allen, C. [Auteur]
NASA Ames Research Center [ARC]
Clarke, B.D. [Auteur]
SETI Institute
Titre de la revue :
Nature
Pagination :
570-573
Éditeur :
Nature Publishing Group
Date de publication :
2011
ISSN :
0028-0836
Discipline(s) HAL :
Planète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
Physique [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
Physique [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
Résumé en anglais : [en]
Delta Scuti ($\delta$ Sct) stars are opacity-driven pulsators with masses of 1.5-2.5$M \odot$, their pulsations resulting from the varying ionization of helium. In less massive stars such as the Sun, convection transports ...
Lire la suite >Delta Scuti ($\delta$ Sct) stars are opacity-driven pulsators with masses of 1.5-2.5$M \odot$, their pulsations resulting from the varying ionization of helium. In less massive stars such as the Sun, convection transports mass and energy through the outer 30 per cent of the star and excites a rich spectrum of resonant acoustic modes. Based on the solar example, with no firm theoretical basis, models predict that the convective envelope in $\delta$ Sct stars extends only about 1 per cent of the radius, but with sufficient energy to excite solar-like oscillations. This was not observed before the Kepler mission, so the presence of a convective envelope in the models has been questioned. Here we report the detection of solar-like oscillations in the $\delta$ Sct star HD 187547, implying that surface convection operates efficiently in stars about twice as massive as the Sun, as the $ad\ hoc$ models predictedLire moins >
Lire la suite >Delta Scuti ($\delta$ Sct) stars are opacity-driven pulsators with masses of 1.5-2.5$M \odot$, their pulsations resulting from the varying ionization of helium. In less massive stars such as the Sun, convection transports mass and energy through the outer 30 per cent of the star and excites a rich spectrum of resonant acoustic modes. Based on the solar example, with no firm theoretical basis, models predict that the convective envelope in $\delta$ Sct stars extends only about 1 per cent of the radius, but with sufficient energy to excite solar-like oscillations. This was not observed before the Kepler mission, so the presence of a convective envelope in the models has been questioned. Here we report the detection of solar-like oscillations in the $\delta$ Sct star HD 187547, implying that surface convection operates efficiently in stars about twice as massive as the Sun, as the $ad\ hoc$ models predictedLire moins >
Langue :
Anglais
Vulgarisation :
Non
Source :
Fichiers
- https://hal-cea.archives-ouvertes.fr/cea-00881660/document
- Accès libre
- Accéder au document
- https://hal-cea.archives-ouvertes.fr/cea-00881660/document
- Accès libre
- Accéder au document
- https://hal-cea.archives-ouvertes.fr/cea-00881660/document
- Accès libre
- Accéder au document
- document
- Accès libre
- Accéder au document
- Ant.pdf
- Accès libre
- Accéder au document
- document
- Accès libre
- Accéder au document
- Ant.pdf
- Accès libre
- Accéder au document