Testing a New Detection Method for RR Lyrae Variable Stars

Details Testing a New Detection Method for RR Lyrae Variable Stars Testing a New Detection Method for RR Lyrae Variable Stars

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aps..tsf.b4005m&link_type=abstract

American Physical Society, Joint Fall 2009 Meeting of the Texas Sections of the APS, AAPT, and SPS Postdeadline, October 22-24,

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Scientific paper

We have tested a new means of identifying RR Lyrae variable stars using large survey single-epoch, out-of-phase photometric and spectroscopic observations. The technique utilizes the marked discrepancy between (g -- r) color and Balmer-line strengths that are taken out of phase with each other. Using data collected from the 0.8-meter telescope at the McDonald Observatory for 13 halo-field stars this summer (two of which were previously confirmed RR Lyrae stars), we showed a discovery efficiency of ˜92%. There is an overall discovery efficiency of ˜85% using data collected from SDSS Stripe 82. The long-term goal for discovery of halo-field RR Lyrae stars is to probe the galaxy's halo substructure, and the properties of halo-field RR Lyrae stars in general.

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