Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...454..420m&link_type=abstract
Astrophysical Journal v.454, p.420
Astronomy and Astrophysics
Astronomy
5
Atomic Processes, Radiative Transfer, Stars: Atmospheres, Stars: White Dwarfs
Scientific paper
The influence of the processes of radiative charge transfer and photo-association during He+ + He collisional processes, as well as the process of the photodissociation of the He+2 molecular ion, on the formation of the continuous spectrum of the DB white dwarf atmospheres with Teff = 12,000-30,000 K, for log g (gravity) = 7 and 8, is studied within the wavelength range λ = 200-800 nm. It is shown that the contribution of these processes relative to other relevant radiative processes is particularly important for Teff ≤ 16,000 K and increases with the decrease of Teff. Moreover, it is found that the influence of the considered He+ + He radiative processes is particularly pronounced in the UV range.
Dimitrijevic Milan S.
Djuric Z.
Ignjatović Lj M.
Mihajlov Anatolij A.
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