Erupting Dwarf Novae in the Large Magellanic Cloud

Details Erupting Dwarf Novae in the Large Magellanic Cloud Erupting Dwarf Novae in the Large Magellanic Cloud

2003-09-10

arxiv.org/abs/astro-ph/0309297v1

Astronomy and Astrophysics

Astrophysics

Accepted for publication in AJ, 28 pages, 9 figures total, Figures 1 and 8 are supplied separately in jpeg format

Scientific paper

10.1086/379307

We report the first likely detections of erupting Dwarf Novae (DN) in an external galaxy: the Large Magellanic Cloud. Six candidates were isolated from approximately a million stars observed every second night over 11 nights with the CTIO 8K x 8K Mosaic2 CCD imager. Artificial dwarf nova and completeness tests suggest that we are seeing only the brightest of the LMC DN, probably SS Cygni-like CVs, but possibly SU UMa-type cataclysmics undergoing superoutbursts. We derive crude but useful limits on the LMC DN surface density, and on the number of DN in the LMC. Many thousands of cataclysmic variables in the Magellanic Clouds can be discovered and characterized with 8 meter class telescopes.

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