TY - JOUR
T1 - Solar Models with Convective Overshoot, Solar-wind Mass Loss, and PMS Disk Accretion
T2 - Helioseismic Quantities, Li Depletion, and Neutrino Fluxes
AU - Zhang, Qian Sheng
AU - Li, Yan
AU - Christensen-Dalsgaard, Jørgen
PY - 2019
Y1 - 2019
N2 - Helioseismic observations have revealed many properties of the Sun: the depth and helium abundance of the convection zone, the sound speed, and the density profiles in the solar interior. Those constraints have been used to judge the stellar evolution theory. With the old solar composition (e.g., GS98), the solar standard model is in reasonable agreement with the helioseismic constraints. However, a solar model with a revised composition (e.g., AGSS09) with a low abundance Z of heavy elements cannot be consistent with those constraints. This is the so-called "solar abundance problem," standing for more than 10 yr even with the recent upward revised Ne abundance. Many mechanisms have been proposed to mitigate the problem. However, there is still no low-Z solar model satisfying all helioseismic constraints. In this paper, we report a possible solution to the solar abundance problem. With some extra physical processes that are not included in the standard model, solar models can be significantly improved. Our new solar models with convective overshoot, the solar wind, and early mass accretion show consistency with helioseismic constraints, the solar Li abundance, and observations of solar neutrino fluxes.
AB - Helioseismic observations have revealed many properties of the Sun: the depth and helium abundance of the convection zone, the sound speed, and the density profiles in the solar interior. Those constraints have been used to judge the stellar evolution theory. With the old solar composition (e.g., GS98), the solar standard model is in reasonable agreement with the helioseismic constraints. However, a solar model with a revised composition (e.g., AGSS09) with a low abundance Z of heavy elements cannot be consistent with those constraints. This is the so-called "solar abundance problem," standing for more than 10 yr even with the recent upward revised Ne abundance. Many mechanisms have been proposed to mitigate the problem. However, there is still no low-Z solar model satisfying all helioseismic constraints. In this paper, we report a possible solution to the solar abundance problem. With some extra physical processes that are not included in the standard model, solar models can be significantly improved. Our new solar models with convective overshoot, the solar wind, and early mass accretion show consistency with helioseismic constraints, the solar Li abundance, and observations of solar neutrino fluxes.
KW - convection
KW - Sun: abundances
KW - Sun: helioseismology
KW - Sun: interior
UR - https://www.scopus.com/pages/publications/85072313446
U2 - 10.3847/1538-4357/ab2f77
DO - 10.3847/1538-4357/ab2f77
M3 - Journal article
AN - SCOPUS:85072313446
SN - 0004-637X
VL - 881
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - 103
ER -