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- W4231291261 abstract "Be stars are defined to be non-supergiant early-type stars of spectral type B showing at times Balmer emission lines in their spectra. These stars often develop strong stellar winds considered to be variable in nature (Slettebak 1988) and have high rotational velocities compared to normal stars of similar spectral types. They also tend to show an excess amount of energy in the near- and far-infrared region compared to normal stars which is presumed to be due the surrounding material around the central star. Thus, the observed energy is a combination of that due to the stellar source and the surrounding material. Various attempts have been made to disentangle the stellar energy component from that of the circumstellar component in order to understand the nature, size and temperature of the envelope. These include: a) Radius determination based on IR excess (Gehrz et al. 1974, Dachs and Hanuschik 1984; Waters et al. 1987), b) Radius estimates from polarization and spectrophotometric data (Jones 1979), c) Envelope dimensions derived from the width of shell absorption cores (Kogure 1969; Hirata and Kogure 1977), d) Dachs et al. (1992) attempted to understand the physical properties, flow patterns and density distribution of the gas by a comparison of synthetic emission line profiles and empirical profiles measured for real Be stars." @default.
- W4231291261 created "2022-05-12" @default.
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- W4231291261 date "1994-01-01" @default.
- W4231291261 modified "2023-09-28" @default.
- W4231291261 title "Energy distribution of Be stars" @default.
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- W4231291261 doi "https://doi.org/10.1017/s0074180900215556" @default.
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