Radial Velocities and Pulsation Ephemerides of 11 Field RR Lyrae Stars

Abstract

We present new radial velocities, improved pulsation periods and reference epoch s of 11 field RR Lyrae ab-type variables: AS Vir, BS Aps, CD Vel, DT Hya, RV Oct, TY Gru, UV Oct, V1645 Sgr, WY Ant, XZ Aps and Z Mic. This study is based on high resolution spectra obtained with the echelle spectro graph of the 2.5-m du Pont telescope at Las Campanas Observatory. We obtained ~200 spectra per star (i.e, total of ~2300 spectra) distributed more or less uniformly throughout their pulsation cycles. Radial velocity curves and photometric lightcurves phased to our new ephemerides are presented for all program stars. In a subsequent paper, we will use these spectra to derive stellar atmospheric parameters and chemical compositions throughout the pulsational cycles, based purely on spectroscopic constraints.

28 pages, 14 figures, 5 tables. Accepted for publication in ApJS

References in corpus (3)

• Multiperiodic Galactic field RR Lyrae stars in the ASAS catalog
• The Chemical Compositions of Non-Variable Red and Blue Field Horizontal Branch Stars
• RR Lyrae Atmospherics: Wrinkles Old and New. A Preview

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• The RRC Stars: Chemical Abundances and Envelope Kinematics
• Template RR Lyrae H alpha, H beta, and H gamma Velocity Curves
• Bright Blazhko RRab Lyrae stars observed by ASAS and the SuperWASP surveys
• Known Galactic field Blazhko stars
• Metal-Rich RRc stars in the Carnegie RR Lyrae Survey
• The Axial Rotation and Variable Macroturbulence of RR Lyrae and Red Horizontal Branch Stars
• RR Lyrae stars as probes of the outer Galactic halo: Chemical and kinematic analysis of a pilot sample
• A Hybrid Mode Model of the Blazhko Effect, Shown to Accurately Fit Kepler Data for RR Lyr
• Hydrogen and Helium Shock Phenomena during Rising Light in RR Lyrae Fundamental Mode Pulsators
• A Study of Pulsation properties of 57 Non-Blazhko effect ab-type RR Lyrae stars with homogeneous metallicities from the LAMOST-Kepler/K2 survey