RR Lyrae stars

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Photometry, Stellar Spectra, Variable Stars, Abundance, Astrometry, Light Curve, Stellar Temperature, Ubv Spectra

Scientific paper

The importance of studying RR Lyrae variables is discussed along with a recent photometric survey of southern RR Lyrae stars. The period-temperature plane for RR Lyrae stars and the B light curve of the extremely metal-poor variable V675 Sgr are plotted. Characteristics of the Walvaren VBLUW photometric system are summarized, and the use of this system in the case of RR Lyrae stars is described. Some important physical properties of field RR Lyrae variables are briefly reviewed.

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