The vertical motions of mono-abundance sub-populations in the milky way disk

Jo Bovy, Hans Walter Rix, David W. Hogg, Timothy C. Beers, Young Sun Lee, Lan Zhang

    Research output: Contribution to journalArticle

    Abstract

    We present the vertical kinematics of stars in the Milky Way's stellar disk inferred from Sloan Digital Sky Survey/Sloan Extension for Galactic Understanding and Exploration (SDSS/SEGUE) G-dwarf data, deriving the vertical velocity dispersion, σz, as a function of vertical height |z| and Galactocentric radius R for a set of "mono-abundance" sub-populations of stars with very similar elemental abundances [α/Fe] and [Fe/H]. We find that all mono-abundance components exhibit nearly isothermal kinematics in |z|, and a slow outward decrease of the vertical velocity dispersion: σz(z, R

    Original languageEnglish (US)
    Article number115
    JournalAstrophysical Journal
    Volume755
    Issue number2
    DOIs
    StatePublished - Aug 20 2012

    Fingerprint

    vertical motion
    subpopulation
    kinematics
    stars
    radii

    Keywords

    • Galaxy: abundances
    • Galaxy: disk
    • Galaxy: evolution
    • Galaxy: formation
    • Galaxy: kinematics and dynamics
    • Galaxy: structure

    ASJC Scopus subject areas

    • Space and Planetary Science
    • Astronomy and Astrophysics

    Cite this

    Bovy, J., Rix, H. W., Hogg, D. W., Beers, T. C., Lee, Y. S., & Zhang, L. (2012). The vertical motions of mono-abundance sub-populations in the milky way disk. Astrophysical Journal, 755(2), [115]. https://doi.org/10.1088/0004-637X/755/2/115

    The vertical motions of mono-abundance sub-populations in the milky way disk. / Bovy, Jo; Rix, Hans Walter; Hogg, David W.; Beers, Timothy C.; Lee, Young Sun; Zhang, Lan.

    In: Astrophysical Journal, Vol. 755, No. 2, 115, 20.08.2012.

    Research output: Contribution to journalArticle

    Bovy, Jo ; Rix, Hans Walter ; Hogg, David W. ; Beers, Timothy C. ; Lee, Young Sun ; Zhang, Lan. / The vertical motions of mono-abundance sub-populations in the milky way disk. In: Astrophysical Journal. 2012 ; Vol. 755, No. 2.
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    AU - Zhang, Lan

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