I would like to ask, whether there is a certain interest in a campaign to estimate or calculate the radius of the accretion disk of VV Cep.
High resolved Halpha spectra, how they are currently received by different observers, do provide the opportunity in August this year, to perform such high interesting goal.
At the beginning of the eclipse, we could observe, the different beginning of the decrease of the intensity of the Halpha emission components V and R. Based on radial velocity measurements of the central absorption core of Halpha, one could calculate the effective radius of the accretion disk of the B companion.
The enclosed Fig. decribes the equivalent widths of the violet (filled circles) and red (opne circles) component of the Halpha emission as function of the Julian Date.
This had been done in the past by Möllenhoff & Schaifers 1978 & 1981, A&A 64, 253-258 and A&A 94, 333-337, and by Kawabata et al. 1981, Publ. Astron. Soc. Japan, 33, 177-188.
It would be great, if this interesting aspect in observation of VV Cep would get a certain attention.