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Sound speed and oscillation frequencies for solar models evolved with Los Alamos ATOMIC opacities | Joyce A. Guzik
; C.J. Fontes
; P. Walczak
; S.R. Wood
; K. Mussack
; E. Farag
; | Date: |
14 May 2016 | Abstract: | Los Alamos National Laboratory has calculated a new generation of radiative
opacities (OPLIB data using the ATOMIC code) for elements with atomic number
Z=1-30 with improved physics input, updated atomic data, and finer temperature
grid to replace the Los Alamos LEDCOP opacities released in the year 2000. We
calculate the evolution of standard solar models including these new opacities,
and compare with models evolved using the Lawrence Livermore National
Laboratory OPAL (Iglesias and Rogers 1996) opacities. We use the solar
abundance mixture of Asplund et al. (2009). The new Los Alamos ATOMIC opacities
have steeper opacity derivatives than those of OPAL for temperatures and
densities of the solar interior radiative zone. We compare the calculated
nonadiabatic solar oscillation frequencies and solar interior sound speed to
observed frequencies and helioseismic inferences. The calculated sound-speed
profiles are similar for models evolved using either the updated Iben evolution
code (see cite{Guzik2010}), or the MESA evolution code (Paxton et al., 2015).
The LANL ATOMIC opacities partially mitigate the "solar abundance problem". | Source: | arXiv, 1605.4452 | Services: | Forum | Review | PDF | Favorites |
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