... He I lines

Dimples are features appearing anywhere on the line profile (so far only for He I lines), described as central absorptions flanked by weak quasi-emission ons on either side that largely compensate the central absorption. These features typically have a lifetime of 2-3 h. Smith et al. (1996) reported that they may occur in the ${\lambda }$6678 line of a few other Be stars.

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... archive

Multi-Mission Archive at Space Telescope Science Institute, in contract to the National Aeronautics and Space Administration.

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