To Be or not to Be and a 50-cm post-mortem eulogy

Details To Be or not to Be and a 50-cm post-mortem eulogy To Be or not to Be and a 50-cm post-mortem eulogy

Mar 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002msngr.107...24b&link_type=abstract

The Messenger, No. 107, p. 24 - 28 (March 2002)

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Be Stars, Circumstellar Disks

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Be stars were discovered as early as 1866 by the famous Jesuit astronomer Angelo Secchi. Not only was γ Cas the first known Be star but the first star ever to be seen displaying emission lines. About half-way between then and today, the work by Otto Struve and others led to the picture that Be stars differ from supergiant B-type stars, which also feature emission lines, in that they are much less evolved, rotate extremely rapidly (up to 450 km/s at the equator), and their emission lines arise from a circumstellar disk.

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