Light and Color Curves of Six Field RR Lyrae Variable Stars

Details Light and Color Curves of Six Field RR Lyrae Variable Stars Light and Color Curves of Six Field RR Lyrae Variable Stars

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002pasp..114..645d&link_type=abstract

The Publications of the Astronomical Society of the Pacific, Volume 114, Issue 796, pp. 645-649.

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3

Ism: Dust, Extinction, Stars: Horizontal-Branch, Stars: Variables: Other

Scientific paper

We present light curves in the B, V, and I passbands for six field RR Lyrae stars. We derive the stars' intensity-mean magnitudes, light amplitudes, and colors at minimum light. We compare the latter with measurements from other variables and discuss the use of (V-I) color at minimum light as a tool for measuring interstellar reddening. From 15 stars, we find the mean dereddened RR Lyrae color at minimum light to be (V-I)0=0.57 mag. The rms scatter of 0.025 mag indicates the precision of this value over a wide range of metallicities and pulsation periods. This research was conducted in part during the 2001 Research Experiences for Undergraduates (REU) and Prácticas de Investigación en Astronomía (PIA) Programs at Cerro Tololo Inter-American Observatory (CTIO).

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