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The symbiotic binary ZZ CMi: intranight variability and suggested outbursting nature
Preprint
R. K. Zamanov ,
K. A. Stoyanov ,
A. Kostov ,
A. Kurtenkov ,
G. Nikolov ,
G. Latev ,
M. F. Bode ,
J. Marti ,
P. L. Luque-Escamilla ,
N. Tomov ,
Y. M. Nikolov ,
S. S. Boeva
11 March 2021
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Abstract
We present photometric and spectral observations of the symbiotic star ZZ CMi. We detect intranight variability - flickering and smooth variations in U band. The amplitude of the flickering is about 0.10-0.20 mag in U band. In the B band the variability is lower, with amplitude less than 0.03 mag. We also detect variability in the H-alpha and H-beta emission lines, and find an indication for outflow with velocity of about 120-150 km/s. The results indicate that ZZ CMi is an accretion powered symbiotic containing an M4-M6 III cool component with a white dwarf resembling recurrent novae and jet-ejecting symbiotic stars.