| Alternative title | Observations of OMI AND. III. A model |
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| DOI | Resolve DOI: https://doi.org/10.1086/130946 |
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| Author | Search for: Poeckert, R.1; Search for: Gulliver, A. F.; Search for: Marlborough, J. M. |
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| Affiliation | - National Research Council Canada. NRC Herzberg Institute of Astrophysics
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| Format | Text, Article |
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| Subject | shell star; emission-line star |
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| Abstract | We 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. |
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| Publication date | 1982-02 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NRC number | NRCC 20241 |
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| NPARC number | 5329859 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | c346c243-f74c-4e92-8e22-ae777888f423 |
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| Record created | 2009-01-09 |
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| Record modified | 2021-05-26 |
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