Period analysis of the RR Lyrae star RU PISCIUM

Details Period analysis of the RR Lyrae star RU PISCIUM Period analysis of the RR Lyrae star RU PISCIUM

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988pasp..100..217m&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 100, Feb. 1988, p. 217-223.

Astronomy and Astrophysics

Astronomy

4

Astronomical Photometry, Horizontal Branch Stars, Periodic Variations, Variable Stars, Light Curve, Stellar Evolution, Stellar Magnitude

Scientific paper

RU Psc is a c-type RR Lyrae star (period P = 0.39 d) known for irregular cycle-to-cycle brightness variations and a possible 28 d Blazhko period. Using proven period-finding techniques over 1100 extant photometric observations were analyzed to see if RU Psc might also be a double-mode RR Lyrae star of the kind recently discovered in the globular clusters M 15, M 3, and IC 4499 (Cox et al. 1983; Clement et al. 1986), and in the Draco dwarf galaxy (Nemec 1985). It is concluded that the peculiarities seen in the photometry of RU Psc are due primarily to rapid and irregular period changes, and are not due to low-amplitude oscillations caused by a secondary period.

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