Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001pasj...53..539u&link_type=abstract
Publications of the Astronomical Society of Japan, vol.53, no. 3, p. 539-545
Astronomy and Astrophysics
Astronomy
18
Accretion, Accretion Disk, Stars: Dwarf Novae, Stars: Individual (V 725 Aquilae), Stars: Variables
Scientific paper
We report our photometric observation of the 1999 September outburst of a dwarf nova, V725Aql. Our detection of superhumps established that it belongs to SUUMa stars. By performing a period analysis of the superhumps, we revealed a long superhump period of 0.09909 +/- 0.00015d, which implies that its orbital period is well over 2 hr. The outburst light curve is typical for a superoutburst, though, after the superoutburst, the object experienced a re-brightening which can be seen in some SUUMa stars with short orbital periods. The 1999 superoutburst occurred about 1650 d after the last possible superoutburst in 1995. This indicates the supercycle of V725Aql to be long, over 1000 d. This long supercycle implies a low mass-transfer rate of this star.
Baklanov Alex
Kato Taichi
Pavlenko Elena
Pietz Jochen
Uemura Makoto
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