Observations of o andromedae. III. A model

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Journal titlePublications of the Astronomical Society of the Pacific
Pages8796; # of pages: 10
Subjectshell star; emission-line star
AbstractWe present a model for the Be star o And which attempts to account for the observed spectroscopic, photometric, and polarimetric changes during the recent shell episode. The model suggests that the waning of the shell was a two-phased process. The initial phase was one in which the density in the inner regions of the circumstellar envelope decreased resulting in a decrease in polarization. Subsequently, the density in the outer regions decreased resulting in the fading of the shell absorption lines. A simple model in which the expansion velocity is independent of time and the mass-loss rate decreases, resulting in a density decrease which propagates outward, fails to satisfy the observed changes in o And. A more complex scenario which does fit the data is proposed.
Publication date
AffiliationNational Research Council Canada; NRC Herzberg Institute of Astrophysics
Peer reviewedNo
NRC number20241
NPARC number5329859
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Record identifierc346c243-f74c-4e92-8e22-ae777888f423
Record created2009-01-09
Record modified2016-05-09
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