Variable stars as tracers of stellar populations in Local Group galaxies: Leo I and NGC 6822

Details Variable stars as tracers of stellar populations in Local Group galaxies: Leo I and NGC 6822 Variable stars as tracers of stellar populations in Local Group galaxies: Leo I and NGC 6822

2003-05-27

arxiv.org/abs/astro-ph/0305506v1

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure, uses mem.cls, in Stars in Galaxies, La Palma, March 2003

Scientific paper

Results are presented of a study of the variable star populations in the dwarf spheroidal galaxy Leo I and in the dwarf irregular galaxy NGC 6822, based on time series photometry obtained with the Wide Field Imager of the 2.2 m ESO/MPI telescope (Leo I) and the Very Large Telescope (NGC 6822). We found about 250 (lower limit) variables in Leo I most of which are RR Lyrae stars. In NGC 6822 we identified 450 candidate variables among which about 20 are RR Lyrae stars, and many are low-luminosity, small-amplitude Cepheids.

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