Neutral helium diffusion coefficients in stars
1978; IOP Publishing; Volume: 226; Linguagem: Inglês
10.1086/156631
ISSN1538-4357
AutoresG. Michaud, A. R. Martel, A. Ratel,
Tópico(s)Chemical Thermodynamics and Molecular Structure
Resumoview Abstract Citations (35) References (13) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Neutral helium diffusion coefficients in stars. Michaud, G. ; Martel, A. ; Ratel, A. Abstract The neutral atom-proton diffusion coefficient is important in the solar corona and in the atmosphere of He-weak and He-rich stars. Through calculations using a realistic potential that reproduces both the inner repulsive core and the longer-range attraction via polarization, the diffusion coefficient for helium is shown to be due mainly to the long-range interaction. Thermal diffusion is calculated and is shown to be negligible. For other elements, the diffusion coefficient due to polarization should be used. Publication: The Astrophysical Journal Pub Date: December 1978 DOI: 10.1086/156631 Bibcode: 1978ApJ...226..483M Keywords: Atmospheric Diffusion; Helium; Neutral Gases; Stellar Atmospheres; A Stars; Diffusion Coefficient; Solar Corona; Thermal Diffusion; Astrophysics; Atomic Processes:Solar Chromosphere; Atomic Processes:Stellar Atmospheres full text sources ADS |
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