Photometry and Spectroscopy of P Cygni: Periodic Variation of the Intrinsic Hα-line Flux

Volume 48 number 2 (2020)

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Ernst Pollmann

Emil-Nolde-Str. 12, 51357 Leverkusen (Germany); ernst-pollmann@t-online.de

Abstract

Simultaneous V-band photometry and high-resolution spectroscopy of P Cygni during the years 2005 to 2019 have been combined to yield a time series of the continuum-corrected line flux of Hα. For the first time, a clear dominant period, 318 ± 1.5 days, is derived.