1. Luminosity class of the symbiotic stars 4U1954+319 and ZZ CMi
- Author
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Zamanov, R., Stoyanov, K. A., Latev, G., Marti, J., Takey, A., Elhosseiny, E. G., Christova, M. D., Minev, M., Vujcic, V., Moyseev, M., Marchev, V., Zamanov, R., Stoyanov, K. A., Latev, G., Marti, J., Takey, A., Elhosseiny, E. G., Christova, M. D., Minev, M., Vujcic, V., Moyseev, M., and Marchev, V.
- Abstract
We performed optical photometry and spectral observations of the symbiotic stars 4U1954+319 and ZZ CMi. For 4U1954+319 using high-resolution spectra we measure the equivalent widths of diffuse interstellar bands and estimate the interstellar reddening E(B-V)=0.83 +/- 0.09. Using GAIA distances and our photometry, we find (1) absolute V band magnitude of 4U1954+319 M_V=-5.23 +/- 0.08 and that the mass donor is a supergiant of luminosity class Ib, and (2) for ZZ CMi M_V=-0.27 +/- 0.2 and that the mass donor is a giant of luminosity class III., Comment: submitted to Serbian Astronomical Journal
- Published
- 2024