Variable stars in the dwarf galaxy GR 8 (DDO 155)

Details Variable stars in the dwarf galaxy GR 8 (DDO 155) Variable stars in the dwarf galaxy GR 8 (DDO 155)

Feb 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aj....109..579t&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 109, no. 2, p. 579-587

Other

36

Astronomical Photography, Dwarf Galaxies, Variable Stars, Cepheid Variables, Distance, Interstellar Extinction

Scientific paper

Observations of the resolved stars in dwarf galaxy GR 8, obtained over the period 1980 February to 1994 March, are presented. Thirty-four separate epochs were searched for variable stars, and a total of six were found, of which one has Cepheid characteristics. After correction for Galactic extinction this single Cepheid yields a distance modulus of m - M = 26.75 +/- 0.35. This corresponds to a distance of 2.24 Mpc, placing GR 8 near the Local Group (LG) zero-velocity surface. The other five variable stars are very red, and possibly have long periods of order 100 days or more.

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