Open AccessNew method for fast and easy computation of radiative accelerations in stars
Author(s) -
LeBlanc F.,
Alecian G.
Publication year - 2004
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2004.08024.x
Subject(s) - radiative transfer , opacity , stars , computation , upper and lower bounds , physics , trace (psycholinguistics) , parametric statistics , diffusion , astrophysics , computational physics , computer science , algorithm , mathematics , quantum mechanics , mathematical analysis , linguistics , philosophy , statistics
Accurate determination of radiative accelerations of the elements is critical when studying atomic diffusion in stars. However, the computing time necessary to calculate these accelerations can become prohibitive because large atomic and opacity data bases are required. Parametric equations of radiative accelerations due to both bound–bound and bound–free transitions, valid at large optical depths, are presented for the following trace elements: C, N, O, Ne, Na, Mg, Al, Si, S, Ar, Ca and Fe. These equations can easily be implemented in existing astrophysical applications without requiring large computing resources.