RADIAL VELOCITIES AND PULSATION EPHEMERIDES OF 11 FIELD RR Lyrae STARS

Bi-Qing For, G.W. Preston, C. Sneden

    Research output: Contribution to journalArticle

    19 Citations (Scopus)

    Abstract

    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 similar to 200 spectra per star (i.e., a total of similar to 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.
    Original languageEnglish
    Pages (from-to)1-9
    JournalAstrophysical Journal Supplement Series
    Volume194
    Issue number38
    DOIs
    Publication statusPublished - 2011

    Fingerprint

    Dive into the research topics of 'RADIAL VELOCITIES AND PULSATION EPHEMERIDES OF 11 FIELD RR Lyrae STARS'. Together they form a unique fingerprint.

    Cite this