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

Journal Article · Mon Jan 01 00:00:00 EST 1990 · Astronomical Journal; (USA)

DOI:https://doi.org/10.1086/115316· OSTI ID:6863914

Saha, A; Hoessel, J G ^[1]

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1. Mount Wilson and Las Campanas Observatories, Pasadena, CA (USA) Space Telescope Science Institute, Baltimore, MD (USA) Washburn Observatory, Madison, WI (USA)

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. 33 refs.

• OSTI ID: 6863914
• Journal Information: Astronomical Journal; (USA), Vol. 99; ISSN 0004-6256
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
VARIABLE STARS
IDENTIFICATION SYSTEMS
CHARGE-COUPLED DEVICES
CHEMICAL COMPOSITION
DISTANCE
ELLIPTICAL CONFIGURATION
GALAXIES
GALAXY NUCLEI
GIANT STARS
MILKY WAY
PHOTOMETRY
PLANETARY NEBULAE
STAR CLUSTERS
CONFIGURATION
NEBULAE
SEMICONDUCTOR DEVICES
STARS
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources