Spectroscopic Variations of the Be-shell Star EW Lac in the V/R Variation Periods
Masahiro Mon,
Masakazu Suzuki,
Yuki Moritani
et al.
Abstract:EW Lac has shown remarkable V/R variations in 1976 -1986, and a similar V/R variation has started again in around 2007, after some quasi-periodic V/R variation. For the first V/R variation event, we analyze the spectroscopic behaviors of emission lines and shell absorption lines of the Balmer series. The V/R variations of the Hα through Hδ lines are characterized by the different manner of variations of the individual emission lines in time lag and in duration of the V/R phases. Weak correlation is also notabl… Show more
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