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The Sun Asphericities: Astrophysical Relevance
J-P. Rozelot, S. Pireaux, S. Lefebvre +1
Of all the fundamental parameters of the Sun (diameter, mass, temperature...), the gravitational multipole moments (of degree l and order m) that determine the solar moments of ine…
Signature of the solar cycle in the low degree p-modes using Mark-I
Sebastián J. Jiménez-Reyes, Thierry Corbard, Pere L. Pallé
High quality observations of the low degree p-modes exist for almost two complete solar cycles using the solar spectrophotometer Mark-I, located and operating at the Observatorio d…
LOWL p-mode frequencies and their variation with solar activity
Sebastián J. Jiménez-Reyes, Thierry Corbard, Pere L. Pallé +1
We present an analysis of the frequency shift and the even terms of the frequency splitting coefficients carried out using six years of LOWL data, starting in 1994. The temporal va…
Non linear regularization for helioseismic inversions. Application for the study of the solar tachocline
T. Corbard, L. Blanc-Feraud, G. Berthomieu +1
Inversions of rotational splittings have shown that there exists at the base of the solar convection zone a region called the tachocline in which high radial gradients of the rotat…
Inferring the equatorial solar tachocline from frequency splittings
T. Corbard, G. Berthomieu, J. Provost +1
Helioseismic inversions, carried out for several years on various ground-based and spatial observations, have shown that the solar rotation rate presents two principal regimes: a q…