CAOSP abstracts, Volume: 28, No.: 2, year: 1998
- Author(s): CHOCHOL, D.; PRIBULLA, T.
- Journal: Contributions of the Astronomical Observatory Skalnate Pleso,
vol. 28, no. 2, p. 121-141.
- Date: 10/1998
- Title: Photometric variability of the slow nova V723 Cas
- Keyword(s): NOVAE, PHOTOMETRY
- Pages: 121 -- 141
We present UBVR photometry of V723 Cas (Nova Cas 1995) obtained from January
1997 through March 1998. Using these as well as archival photoelectric and
visual observations, we have found an 180 day periodicity of the activity on
the declining branch of the light-curve. The stages of activity, characterized
by flare(s), occurred after the brightness decreases. Period analysis of the
short-term brightness variations and the study of phase light-curves in
quiescent stage revealed the most significant period as 0.63 days. The same
analysis applied on brightness variations in active stage (January-February
1997) revealed the periods 0.61 days or 2.8 days. Detected periods are
interpreted in the frame of possible binary and triple-star models. The
evolutionary path of the nova in the two-colour diagram is presented. It is
shown, that at brightness maximum, discussed as a super-Eddington event, the
main envelope of the nova was ejected with the velocity 210 km/s.
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