AAVSO: American Association of Variable Star Observers

Supplementary Intermediate Report (July 2022) to the Spectroscopic Monitoring of the 2017–2019 Eclipse of VV Cephei

Volume 50 number 2 (2022)

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Ernst Pollmann
International Working Group Active Spectroscopy in Astronomy (ASPA), Emil-Nolde-Str. 12, 51375 Leverkusen, Germany; ernst-pollmann@t-online.de

Abstract

In a report that we previously published on spectroscopic monitoring of VV Cephei, time-series analysis yielded a different period (52 d) for the radial velocity of the violet (V) emission lobe of Hα than for the other features of Hα (42 d). Here, an analysis incorporating extensive new data resolves this discrepancy, giving an improved period of 43.8 ± 0.1 d for all Hα features.