RR Lyrae Stars in the Far Ultraviolet: GALEX Observations Compared with Theoretical Predictions

Details RR Lyrae Stars in the Far Ultraviolet: GALEX Observations Compared with Theoretical Predictions RR Lyrae Stars in the Far Ultraviolet: GALEX Observations Compared with Theoretical Predictions

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...20712203b&link_type=abstract

American Astronomical Society Meeting 207, #122.03; Bulletin of the American Astronomical Society, Vol. 37, p.1364

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Scientific paper

Until recently, RR Lyrae stars have been sparsely observed at wavelengths shorter than 2000Å. The NASA Galaxy Evolution Explorer (GALEX) satellite has serendipitously obtained simultaneous near and far ultraviolet light curves of several RR Lyrae stars, which vary during their pulsation cycle by up to 6.3 magnitudes in the GALEX FUV channel (1350Å-1800Å). This variation is far greater than the <1.5 mag seen at visible wavelengths. We show a comparison of several GALEX UV light curves with those calculated from Kurucz stellar atmosphere models, and also describe methods for identifying new RR Lyrae stars using GALEX in conjunction with other survey photometric data.

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