Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a...100...79r&link_type=abstract
Astronomy and Astrophysics, vol. 100, no. 1, July 1981, p. 79-90. Research supported by the Comision de Investigaciones Cientif
Astronomy and Astrophysics
Astronomy
14
Stellar Envelopes, Stellar Luminosity, Stellar Rotation, Stellar Spectrophotometry, Ultraviolet Astronomy, Variable Stars, Absorption Spectra, B Stars, Early Stars, Emission Spectra, Iue, Resonance Lines, Stellar Temperature
Scientific paper
An analysis of 27 CMa, Pi Aqr, and 48 Lib, Be stars and V/R variables is discussed to determine the physical conditions and the gaseous structure surrounding the stars. On the basis of two different types of absorption lines the narrow and deep, and the broad and shallow profiles, the gaseous structure is divided into two regions: (1) a geometrically thin region that rotates with the stars, and exhibits higher ionization temperatures than the temperature of the radiation field of the stars, and expands with velocities not higher than the escape velocity of a normal star; and (2) an extended cold region which does not rotate with the star, with expansion velocities decreasing to the values of the radial velocities of the interstellar line.
Fontenla Juan Manuel
Ringuelet Adela E.
Rovira Marta
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