Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ap%26ss..33..295d&link_type=abstract
Astrophysics and Space Science, vol. 33, Apr. 1975, p. 295-323.
Astronomy and Astrophysics
Astrophysics
3
Astronomical Models, Radiation Distribution, Stellar Atmospheres, Supergiant Stars, Kinetic Energy, Optical Thickness, Radiative Transfer, Tables (Data), Thermodynamic Equilibrium
Scientific paper
On the basis of assumed photospheric temperature models for 36 extreme supergiants (log ge-values of 1, 0.5 and 0; Te ranging from approx. 3700-33 000 K) photospheric fluxes S(i~) were computed for 36 wavelengths ranging from 100 A to 60 000 A. The hot models are in perfect radiative equilibrium; the cooler show deviations up to 10%, sometimes even larger. Only in the relatively deep parts of the photospheres (r5 ~ 1) the radiation field at each geometrical level can be characterized by one unique radiation temperature; for smaller ~5-values there are large deviations from local thermal equilibrium. The influence of deviations from local thermodynamical equilibrium on the fluxes is briefly examined, and appears small but for the shortest wavelengths. In tables and graphs we give for these models ~tF(2)-values, integrated fluxes, effective temperatures, colours U, B and V. and the Balmer discontinuity D
de Jager Cornelis
Neven L.
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