Astronomy and Astrophysics – Astrophysics
Scientific paper
1996-11-17
Astronomy and Astrophysics
Astrophysics
11 pages, 10 eps. figures, Latex, accepted for publication in MNRAS
Scientific paper
We present results of 32 nights of CCD photometry of V1974 Cygni, from the years 1994 and 1995. We verify the presence of two distinct periodicities in the light curve: 0.0812585 day~1.95 hours and 0.0849767 d~2.04 hr. We establish that the shorter periodicity is the orbital period of the underlying binary system. The longer period oscillates with an average value of |dot(P)| ~ 3x10^(7)--typical to permanent superhumps. The two periods obey the linear relation between the orbital and superhump periods that holds among members of the SU Ursae Majoris class of dwarf novae. A third periodicity of 0.083204 d~2.00 hr appeared in 1994 but not in 1995. It may be related to the recently discovered anti-superhump phenomenon. These results suggest a linkage between the classical nova V1974 Cyg and the SU UMa stars, and indicate the existence of an accretion disk and permanent superhumps in the system no later than 30 months after the nova outburst. From the precessing disk model of the superhump phenomenon we estimate that the mass ratio in the binary system is between 2.2 and 3.6. Combined with previous results this implies a white dwarf mass of 0.75-1.07 M sun.
Leibowitz Elia M.
Ofek Eran O.
Retter Alon
No associations
LandOfFree
Permanent Superhumps in V1974 Cyg does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Permanent Superhumps in V1974 Cyg, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Permanent Superhumps in V1974 Cyg will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-649031