Journal
ASTRONOMICAL JOURNAL
Volume 144, Issue 4, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-6256/144/4/114
Keywords
stars: horizontal-branch; stars: Population II; stars: variables: RR Lyrae; techniques: radial velocities
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Funding
- NSF [AST-0908139, AST-1009987]
- NASA Grant
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [0908139] Funding Source: National Science Foundation
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We present template radial velocity curves of ab-type RR Lyrae stars constructed from high-precision measurements of H alpha, H beta, and H gamma lines. Amplitude correlations between the Balmer line velocity curves, Johnson V band, and Sloan Digital Sky Survey (SDSS) g- and r-band light curves are also derived. Compared to previous methods, these templates and derived correlations reduce the uncertainty in measured systemic (center-of-mass) velocities of RR Lyrae stars by up to 15 km s(-1), and will be of particular interest to wide-area spectroscopic surveys such as the SDSS and LAMOST Experiment for Galactic Understanding and Exploration.
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