Identifying Blue Horizontal Branch Stars Using the z Filter

John J. Vickers*, Eva K. Grebel, Avon P. Huxor

*Awdur cyfatebol y gwaith hwn

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid


    In this paper we present a new method for selecting blue horizontal branch (BHB) candidates based on color-color photometry. We make use of the Sloan Digital Sky Survey z band as a surface gravity indicator and show its value for selecting BHB stars from quasars, white dwarfs, and main-sequence A-type stars. Using the g, r, i, and z bands, we demonstrate that extraction accuracies on a par with more traditional u, g, and r photometric selection methods may be achieved. We also show that the completeness necessary to probe major Galactic structure may be maintained. Our new method allows us to efficiently select BHB stars from photometric sky surveys that do not include a u-band filter such as the Panoramic Survey Telescope and Rapid Response System.

    Iaith wreiddiolSaesneg
    Rhif yr erthygl86
    Nifer y tudalennau9
    CyfnodolynAstronomical Journal
    Rhif cyhoeddi4
    Dynodwyr Gwrthrych Digidol (DOIs)
    StatwsCyhoeddwyd - Ebr 2012

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