The symbiotic recurrent nova V3890 Sgr: binary parameters and pre-outburst activity
The symbiotic recurrent nova V3890 Sgr: binary parameters and pre-outburst activity
We present and analyze optical photometry and high resolution SALT spectra of the symbiotic recurrent nova V3890 Sgr at quiescence. The orbital period, P=747.6 days has been derived from both photometric and spectroscopic data. Our double-line spectroscopic orbits indicate that the mass ratio is q=M_g/M_WD=0.78+/-0.05, and that the component masses …