A newly discovered SU UMa-type dwarf nova, HS 1449+6415
D. Nogami ** 1,
D. Engels 2,
B.T. Gänsicke 1,
E.P. Pavlenko 3,4,
R. Novák 5 and
K. Reinsch 1
Received 21 August 2000 / Accepted 2 October 2000
We report time-resolved photometric observations of the Hamburg Quasar Survey-selected dwarf nova HS 1449+6415 (= RX J1450.5+6403) during the interval from JD 2451672 to 2451724. During a long outburst with a duration of 12 days, we detected superhumps with a period of , revealing that this star is an SU UMa star. A short outburst which lasted 3 days was found about 40 days after the onset of the superoutburst. From quiescence observations, we determine an orbital period of . The small outburst amplitude of 3.5 mag, the short orbital period, and the normal outburst cycle length suggest that HS 1449+6415 is an intermediate object between ER UMa stars with high mass-transfer rates and WZ Sge stars with very low mass-transfer rates.
Key words: accretion, accretion disks surveys stars: novae, cataclysmic variables stars: oscillations stars: individual: HS 1449+6415
* Visiting Astronomer, German-Spanish Astronomical Center, Calar Alto, operated by the Max-Planck-Institut für Astronomie, Heidelberg, jointly with the Spanich National Commission for Astronomy.
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© European Southern Observatory (ESO) 2000
Online publication: January 29, 2001