UW Gruis - A normal ab-type RR Lyrae star

Details UW Gruis - A normal ab-type RR Lyrae star UW Gruis - A normal ab-type RR Lyrae star

Aug 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982pasp...94..700b&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 94, Aug. 1982, p. 700-704.

Astronomy and Astrophysics

Astronomy

4

Cepheid Variables, Electrophotometry, Giant Stars, Ubv Spectra, Light Curve, Metallic Stars, Stellar Color

Scientific paper

Photoelectric UBV observations in 1978, 1979, and 1981 of the RR Lyrae star UW Gru are presented. The variable clearly belongs to the Bailey ab-type on the basis of the shape of the light and color curves, with a period of 0.548210 day and a mean visual magnitude V 13.22, the amplitude in V being nearly one magnitude. The origin of the heliocentric epochs of light maxima is taken at HJD 2443689.640.
A metal abundance [Fe/H] - 1.6 relative to the sun is indicated from the ultraviolet excess parameter δ (U-B) = 0.04.
Thus, UW Gru which is located about 2.9 kpc away from the sun, 2.3 kpc below the galactic plane, definitely shows the typical features of a normal halo RR Lyrae star.

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