Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...203.8303l&link_type=abstract
American Astronomical Society Meeting 203, #83.03; Bulletin of the American Astronomical Society, Vol. 35, p.1338
Astronomy and Astrophysics
Astronomy
Scientific paper
Obtaining accurate reddenings, and hence distances, to Population II objects at low Galactic latitude remains a challenge despite the availablity of all-sky reddening maps. Observations have shown that RR Lyrae variable stars (RRL) exhibit a common intrinsic (B-V) color when observed at minimum light. This enables star-by-star reddening estimates to RRL in environments where the reddening is high and spatially variable. However, such environments are better suited to photometric studies in the VI passbands. We describe a project to establish the intrinsic (V-I) color of RRL. We present new VI light curves obtained for a number of nearby, low-reddening RRL, along with a preliminary calibration of the RRL intrinsic (V-I) color and its sensitivity to metallicity and pulsation period. This project was funded by a grant from the NSF.
Boswell B.
Layden Andrew
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