On the Ephemeris of the Cataclysmic Variable V2051-OPHIUCHI - Evidence of Orbital Period Cyclic Changes

Details On the Ephemeris of the Cataclysmic Variable V2051-OPHIUCHI - Evidence of Orbital Period Cyclic Changes On the Ephemeris of the Cataclysmic Variable V2051-OPHIUCHI - Evidence of Orbital Period Cyclic Changes

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...275..187e&link_type=abstract

Astronomy and Astrophysics, Vol.275, NO. 1/AUG(I), P. 187, 1993

Astronomy and Astrophysics

Astrophysics

9

Stars: Cataclysmic Variables, V 2051 Oph

Scientific paper

Photometry of the cataclysmic variable V 2051 Oph was obtained at V and white wavelengths. The new eclipse timings, measured several years after the last published values, show that there is evidence of cyclic variations like those observed in other cataclysmic variables, with a period of about 6.87 yr. However, no secular change in the orbital period is observed. A 3σ upper limit to a secular variation is Pṡ < 1.50 1O-11. From this limit we estimate an upper limit to the rate of mass transfer of Mṡ < 1.12 1O-8 Msun yr-1. A comparison with other methods to obtain mass transfer rates suggests that we may have to wait for a decade or more to detect any deviation from the actual orbital period.

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