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

Journal Article · Mon Jan 01 04:00:00 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), Journal Name: Astronomical Journal; (USA) Vol. 99; ISSN 0004-6256; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

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