Issue |
EAS Publications Series
Volume 58, 2012
ECLA - European Conference on Laboratory Astrophysics
|
|
---|---|---|
Page(s) | 43 - 50 | |
DOI | https://doi.org/10.1051/eas/1258006 | |
Published online | 13 February 2013 |
C. Stehlé, C. Joblin and L. d’Hendecourt (eds)
EAS Publications Series, 58 (2012) 43-50
Seismology of Sun and stars and related opacity laboratory measurements
SAp/IRFU/DSM CE Saclay,
91191
Gif-sur-Yvette Cedex,
France
CNES, ESA and NASA have invested in helioseismic and asteroseismic disciplines for 2 decades with SoHO (1995–2015), COROT (2006–2013), KEPLER (2009–2014), PICARD (2010–2013) and SDO (2010–2015). These missions focus on the stellar internal dynamics and their influence of neighboring planets. Progress along this path requires that the microscopic physics is well under control, but several seismic probes indicate some discrepancies which justify new investigations of the energy transport in radiative zones of the Sun and massive stars, despite strong efforts dedicated to reaction rates, screening, equation of state and opacity coefficients between 1990 and 2000. We describe here how the OPAC consortium tackles the complex problem of photon absorption by matter both theoretically and experimentally, by using high energy laser facilities. These studies might be also useful for other disciplines like fusion for energy and X-ray spectroscopy astronomy.
© The Author(s) 2013