Theoretical and experimental activities on opacities for a good interpretation of seismic stellar probes
Sylvaine Turck-Chieze
(1, 2)
,
G. Loisel
(1, 2, 3)
,
D. Gilles
(1, 2)
,
Frédéric Thais
(4, 3)
,
S. Bastiani
(5)
,
Christophe Blancard
(6)
,
Michel Busquet
(7)
,
T. Caillaud
(6)
,
Philippe Cossé
(6)
,
T. Blenski
(4, 3)
,
Franck Delahaye
(8, 9)
,
J. Educret
(1, 2)
,
Gérald Faussurier
(6)
,
F. Gilleron
(6)
,
Joyce A. Guzik
(10)
,
J. W. Harris
(11)
,
D. P. Kilcrease
(10)
,
N. H. Magee
(10)
,
Laurent Piau
(1, 2)
,
J. C. Pain
(6)
,
M. Poirier
(3, 4)
,
Q. Porcherot
(6)
,
C. Reverdin
(6)
,
V. Silvert
(6)
,
B. Villette
(6)
,
Claude J. Zeippen
(8, 9)
1
CEA -
Commissariat à l'énergie atomique et aux énergies alternatives
2 CELIA - Centre d'Etudes Lasers Intenses et Applications
3 MHDE - Matière à Haute Densité d'Energie
4 LIDYL - Laboratoire Interactions, Dynamiques et Lasers (ex SPAM)
5 LULI - Laboratoire pour l'utilisation des lasers intenses
6 DAM/DIF - DAM Île-de-France
7 ARTEP Inc
8 LERMA - Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique
9 Dynamique des milieux interstellaires et plasmas stellaires
10 Theoretical Division [Los Alamos]
11 AWE Reading
2 CELIA - Centre d'Etudes Lasers Intenses et Applications
3 MHDE - Matière à Haute Densité d'Energie
4 LIDYL - Laboratoire Interactions, Dynamiques et Lasers (ex SPAM)
5 LULI - Laboratoire pour l'utilisation des lasers intenses
6 DAM/DIF - DAM Île-de-France
7 ARTEP Inc
8 LERMA - Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique
9 Dynamique des milieux interstellaires et plasmas stellaires
10 Theoretical Division [Los Alamos]
11 AWE Reading
Résumé
Opacity calculations are basic ingredients of stellar modelling. They play a crucial role in the interpretation of acoustic modes detected by SoHO, COROT and KEPLER. In this review we present our activities on both theoretical and experimental sides. We show new calculations of opacity spectra and comparisons between eight groups who produce opacity spectra calculations in the domain where experiments are scheduled. Real differences are noticed with real astrophysical consequences when one extends helioseismology to cluster studies of different compositions. Two cases are considered presently: (1) the solar radiative zone and (2) the beta Cephei envelops. We describe how our experiments are performed and new preliminary results on nickel obtained in the campaign 2010 at LULI 2000 at Polytechnique.