EDP Sciences
Free access
Volume 375, Number 3, September 2001
Page(s) 1062 - 1064
Section The Sun
DOI http://dx.doi.org/10.1051/0004-6361:20010946

A&A 375, 1062-1064 (2001)
DOI: 10.1051/0004-6361:20010946

Relativistic effects in the solar EOS

A helioseismic forward analysis
A. Bonanno1, A. L. Murabito2 and L. Paternò2

1  Osservatorio Astrofisico di Catania, Città Universitaria, 95123 Catania, Italy
2  Dipartimento di Fisica e Astronomia dell'Università, Sezione Astrofisica, Città Universitaria, 95123 Catania, Italy
    e-mail: amu@sunct.ct.astro.it; lpaterno@alpha4.ct.astro.it

(Received 18 April 2001 / Accepted 14 June 2001 )

We study the sensitivity of the sound speed to relativistic corrections of the equation of state (EOS) in the standard solar model by means of a helioseismic forward analysis. We use the latest GOLF/SOHO data for $\ell = 0$, 1, 2, 3 modes to confirm that the inclusion of the relativistic corrections to the adiabatic exponent $\Gamma_1$ computed from both OPAL and MHD EOS leads to a more reliable theoretical modelling of the innermost layers of the Sun.

Key words: Sun: interior -- Sun: oscillations -- equation of state

Offprint request: A. Bonanno, abo@sunct.ct.astro.it

© ESO 2001