Radiative properties of stellar plasmas and open challenges
Sylvaine Turck-Chieze
(1)
,
G. Loisel
(1, 2)
,
D. Gilles
(1)
,
Laurent Piau
(1)
,
Christophe Blancard
(3)
,
T. Blenski
(2)
,
Michel Busquet
(4)
,
T. Caillaud
(3)
,
Philippe Cossé
(3)
,
Franck Delahaye
(5, 6)
,
Gérald Faussurier
(3)
,
J. Fariaut
(3)
,
F. Gilleron
(3)
,
Joyce A. Guzik
(7)
,
J. Harris
(8)
,
D. P. Kilcrease
(7)
,
N. H. Magee
(7)
,
J. C. Pain
(3)
,
Q. Porcherot
(3)
,
M. Poirier
(2)
,
G. Soullier
(3)
,
Claude J. Zeippen
(5, 6)
,
S. Bastiani-Ceccotti
(9)
,
C. Reverdin
(3)
,
V. Silvert
(3)
,
Frédéric Thais
(2)
,
B. Villette
(3)
1
AIM (UMR_7158 / UMR_E_9005 / UM_112) -
Astrophysique Interprétation Modélisation
2 LIDYL - Laboratoire Interactions, Dynamiques et Lasers (ex SPAM)
3 DAM/DIF - DAM Île-de-France
4 LPGP - Laboratoire de physique des gaz et des plasmas
5 LERMA - Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique
6 Dynamique des milieux interstellaires et plasmas stellaires
7 Theoretical Division [Los Alamos]
8 AWE Reading
9 LULI - Laboratoire pour l'utilisation des lasers intenses
2 LIDYL - Laboratoire Interactions, Dynamiques et Lasers (ex SPAM)
3 DAM/DIF - DAM Île-de-France
4 LPGP - Laboratoire de physique des gaz et des plasmas
5 LERMA - Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique
6 Dynamique des milieux interstellaires et plasmas stellaires
7 Theoretical Division [Los Alamos]
8 AWE Reading
9 LULI - Laboratoire pour l'utilisation des lasers intenses
Résumé
The lifetime of solar-like stars, the envelope structure of more massive stars, and stellar acoustic frequencies largely depend on the radiative properties of the stellar plasma. Up to now, these complex quantities have been estimated only theoretically. The development of the powerful tools of helio- and astero- seismology has made it possible to gain insights on the interiors of stars. Consequently, increased emphasis is now placed on knowledge of the monochromatic opacity coefficients. Here we review how these radiative properties play a role, and where they are most important. We then concentrate specifically on the envelopes of beta Cephei variable stars. We discuss the dispersion of eight different theoretical estimates of the monochromatic opacity spectrum and the challenges we need to face to check these calculations experimentally.