Serendipitous discovery of a distant Galactic RR Lyrae star in front of the Virgo elliptical NGC 4472

Journal Article · Wed Nov 01 04:00:00 EST 1989 · Astronomical Journal; (USA)

DOI:https://doi.org/10.1086/115249· OSTI ID:7144089

Ciardullo, R; Jacoby, G H; Bond, H E ^[1]

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1. Kitt Peak National Observatory, Tucson, AZ (USA) Space Telescope Science Institute, Baltimore, MD (USA)

The discovery of a new ab-type RR Lyrae variable, projected in front of the giant elliptical galaxy NGC 4472 in the Virgo Cluster, is reported. CCD photometry of the star shows it has a period of 0.6661 day, a mean V magnitude of 19.23, and a V amplitude of 0.40 mg. These properties place the star far above the Galactic plane and about 50 kpc from the Galactic center, making it the field halo star with the largest well-established distance now known. 23 refs.

• OSTI ID: 7144089
• Journal Information: Astronomical Journal; (USA), Journal Name: Astronomical Journal; (USA) Vol. 98; 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
CONFIGURATION
DETECTION
ELLIPTICAL CONFIGURATION
GALAXIES
GALAXY CLUSTERS
GALAXY NUCLEI
MILKY WAY
NEBULAE
PHOTOMETRY
PLANETARY NEBULAE
SEMICONDUCTOR DEVICES
STARS
VARIABLE STARS