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shell star

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shell star

A hot main-sequence star, usually of spectral type B, whose complex spectrum shows sharp deep absorption lines with wings of bright emission lines superimposed on the normal absorption spectrum. It is now known that they are Be stars, the differences in appearance between the two arising from the directions in which they are observed.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

shell star

[′shel ‚stär]
(astronomy)
A type of star which is believed to be surrounded by a tenuous envelope of gas, as indicated by bright emission lines in its spectrum.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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