RR Lyrae Variables In The Ultraviolet: The View From GALEX

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

The GALEX ultraviolet survey has serendipitously obtained complete FUV (1350-1800A) and NUV (1800-2800A) light curves of several RR Lyrae stars, such as HL Her and SDSS J105622.2+570520.6 . Using visible photometry (obtained at the Lick Observatory) together with the GALEX UV data we compare these light curves with predictions based on Kurucz stellar atmosphere models. A FUV variation of 6.5 stellar magnitudes in SW Aqr is consistent with theoretical predictions based on the published metallicity of this star.

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