A Newly Discovered SU UMa-Type Dwarf Nova, HS 1449+6415

Details A Newly Discovered SU UMa-Type Dwarf Nova, HS 1449+6415 A Newly Discovered SU UMa-Type Dwarf Nova, HS 1449+6415

2000-08-21

arxiv.org/abs/astro-ph/0008323v1

Astronomy and Astrophysics

Astrophysics

5 pages, 6 figures, submitted to A&A

Scientific paper

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 0.0601(5) d, 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 0.05898(2) d. 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.

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