Discovery of a new SU UMa-type dwarf nova V344 Lyrae

Astronomy and Astrophysics – Astronomy

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Accretion Disks, Cataclysmic Variables, Dwarf Novae, Main Sequence Stars, Astronomical Photometry, Charge Coupled Devices, Stellar Magnitude

Scientific paper

A faint dwarf nova, V344 Lyrae, was observed for five nights in its long outburst during May-June, 1993. V-band Charge Coupled Device (CCD) photometry revealed superhumps with a period of 0.09145 (+/- 0.00002) d and an amplitude of 0.3 mag. This finding confirms V344 Lyrae as being a new member of SU UMa-type dwarf novae and places it as the second longest orbital-period dwarf nova below the period gap. The cycle lengths of the normal outbursts and superoutbursts have been estimated to be 16 +/- 3 d and 240 d, respectively.

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