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Scientific paper
Mar 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..752..175s&link_type=abstract
STELLAR ASTROPHYSICS WITH THE WORLD'S LARGEST TELESCOPES: First International Workshop on Stellar Astrophysics with the World's
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Novae, Dwarf Novae, Recurrent Novae, And Other Cataclysmic Variables, Stellar Content And Populations, Radii, Morphology And Overall Structure, Elliptical Galaxies
Scientific paper
SALT is uniquely poised to make major inroads in the study of extragalactic cataclysmic variables (CVs) - novae and dwarf novae. The ability to search an external galaxy for erupting CVs night after night, for months at a time, AND to obtain confirmatory spectra within a night of discovery is unique and invaluable. We present several examples of multi-week to multi-month searches for extragalactic CVs with 1 to 4 meter-class telescopes. In particular, we have detected the first erupting dwarf novae in the LMC and placed a lower limit on the number of CVs in that galaxy. We have also observed the Local Group dwarf ellipticals M32 and NGC 205 in their entirety every clear night over a 4.5 month interval. In this survey we discovered one nova each in M32 and NGC 205, far more than previous nova surveys led us to expect. A similar search in M81 again reveals more novae than expected, and demonstrates, conclusively, that novae are predominantly a bulge population in spiral galaxies. Finally we report the detection of intergalactic tramp novae in the Fornax cluster, and emphasize that these are valuable tracers of stars stripped from their hosts during galaxy harassment. The insights gained during these preliminary studies illustrate how valuable SALT campaigns on extragalactic CVs will be.
Neill James D.
Shara Michael M.
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