Observations of Omicron Andromedae. III - A model

Details Observations of Omicron Andromedae. III - A model Observations of Omicron Andromedae. III - A model

Feb 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982pasp...94...87p&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 94, Feb. 1982, p. 87-96.

Astronomy and Astrophysics

Astronomy

6

B Stars, Electron Density (Concentration), H Alpha Line, Polarimetry, Stellar Envelopes, Stellar Models, Stellar Spectrophotometry, Astronomical Spectroscopy, Emission Spectra, Hydrogen, Polarization Characteristics, Radiant Flux Density, Stellar Mass Ejection, Time Dependence

Scientific paper

A model is developed to account for the spectroscopic, photometric and polarimetric observations of the Be star Omicron Andromedae during the recent shell episode. A static solution for electron density and hydrogen level populations within a circumstellar envelope is first presented in which the shell is assumed static at the start of the shell episode, when shell density and polarization were high. Consideration of the time-dependent aspects of the problem then results in models for the waning of the shell in terms of a decrease in the mass loss rate, which is not able to account for the time difference in inner and outer shell density decreases, or a time-variable expansion velocity law, which was found to be more successful.

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