RR Lyrae stars in local group galaxies. I - NGC 185

Details RR Lyrae stars in local group galaxies. I - NGC 185 RR Lyrae stars in local group galaxies. I - NGC 185

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj.....99...97s&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 99, Jan. 1990, p. 97-148. Research supported by the Carnegie Institution.

Astronomy and Astrophysics

Astronomy

118

Astronomical Photometry, Charge Coupled Devices, Light Curve, Lyra Constellation, Planetary Nebulae, Dwarf Galaxies, Elliptical Galaxies, Galactic Nuclei, Globular Clusters, Metallic Stars, Milky Way Galaxy

Scientific paper

Deep CCD images of NGC 185 taken with the '4-shooter' on the Hale 5-m telescope have been processed to find and photometrically measure RR Lyrae stars. 176 variable stars have been found, of which 151 are surmised to be RR Lyrae stars. Finding charts, periods, and light curves are presented. The RR Lyrae stars in this galaxy have a very wide distribution of periods indicating a wide range of metallicity. The mean magnitudes of the RR Lyraes is determined to be 25.20 mag. A distance modulus of 23.79 is derived, based on the best currently available values of foreground extinction and mean absolute magnitudes of RR Lyrae stars.

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