SIMBAD references

2011ApJS..194...38F - Astrophys. J., Suppl. Ser., 194, 38 (2011/June-0)

Radial velocities and pulsation ephemerides of 11 field RR Lyrae stars.


Abstract (from CDS):

We present new radial velocities (RVs), improved pulsation periods, and reference epochs 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 spectrograph of the 2.5 m du Pont telescope at Las Campanas Observatory. We obtained ∼200 spectra per star (i.e., a total of ∼2300 spectra), distributed more or less uniformly throughout their pulsation cycles. RV curves and photometric light curves 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.

Abstract Copyright:

Journal keyword(s): stars: horizontal-branch - stars: Population II - stars: variables: RR Lyrae - techniques: radial velocities

VizieR on-line data: <Available at CDS (J/ApJS/194/38): stars.dat table4.dat>

Simbad objects: 18

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