Physics – Optics
Scientific paper
Dec 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978sva....22..691k&link_type=abstract
(Astronomicheskii Zhurnal, vol. 55, Nov.-Dec. 1978, p. 1214-1221.) Soviet Astronomy, vol. 22, Nov.-Dec. 1978, p. 691-695. Trans
Physics
Optics
Astronomical Spectroscopy, H Lines, Magnetic Stars, Stellar Atmospheres, Stellar Spectra, Variable Stars, Atmospheric Optics, H Gamma Line, Optical Thickness, Phase Deviation, Spectral Line Width, Stellar Magnetic Fields
Scientific paper
Variations in the effective temperatures, surface gravities, electron densities, and atmospheric scale heights of the peculiar magnetic stars Alpha-2 CVn and HD 184905 are determined, primarily from the equivalent widths and profiles of the H-gamma and H-delta lines. It is found that the surface-gravity variations of both stars exhibit two maxima per period, that the effective temperatures vary over the surfaces with amplitudes of close to 1100 K for Alpha-2 CVn and of 650-700 K for HD 184905, and that the surface of Alpha-2 CVn contains hot, dense and cold, rarefied regions coinciding with two iron-peak spots. Both stars are shown to have inhomogeneous atmospheres in different surface regions.
Chunakova N. M.
Kopylov I. M.
Kumaigorodskaia R. N.
Snezhko L. I.
Sokolov Valentin V.
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