University of Hertfordshire Research Archive

        JavaScript is disabled for your browser. Some features of this site may not work without it.

        Browse

        All of UHRABy Issue DateAuthorsTitlesThis CollectionBy Issue DateAuthorsTitles

        Arkivum Files

        My Downloads
        View Item 
        • UHRA Home
        • University of Hertfordshire
        • Research publications
        • View Item
        • UHRA Home
        • University of Hertfordshire
        • Research publications
        • View Item

        Connection between dynamically derived initial mass function normalization and stellar population parameters

        View/Open
        907144.pdf (PDF, 1Mb)
        Author
        McDermid, Richard M.
        Cappellari, Michele
        Alatalo, Katherine
        Bayet, Estelle
        Blitz, Leo
        Bois, Maxime
        Bournaud, Frédéric
        Bureau, Martin
        Crocker, Alison F.
        Davies, Roger L.
        Davis, Timothy
        de Zeeuw, P.T.
        Duc, Pierre-Alain
        Emsellem, Eric
        Khochfar, Sadegh
        Krajnović, Davor
        Kuntschner, Harald
        Morganti, Raffaella
        Naab, Thorsten
        Oosterloo, Tom
        Sarzi, Marc
        Scott, Nicholas
        Serra, Paolo
        Weijmans, Anne Marie
        Young, Lisa M.
        Attention
        2299/16356
        Abstract
        We report on empirical trends between the dynamically determined stellar initial mass function (IMF) and stellar population properties for a complete, volume-limited sample of 260 early-type galaxies from the ATLAS3D project. We study trends between our dynamically derived IMF normalization αdyn ≡ (M/L)stars/(M/L)Salp and absorption line strengths, and interpret these via single stellar population-equivalent ages, abundance ratios (measured as [α/Fe]), and total metallicity, [Z/H]. We find that old and alpha-enhanced galaxies tend to have on average heavier (Salpeter-like) mass normalization of the IMF, but stellar population does not appear to be a good predictor of the IMF, with a large range of αdyn at a given population parameter. As a result, we find weak αdyn-[α/Fe] and αdyn -Age correlations and no significant αdyn -[Z/H] correlation. The observed trends appear significantly weaker than those reported in studies that measure the IMF normalization via the low-mass star demographics inferred through stellar spectral analysis.
        Publication date
        2014-09-10
        Published in
        Astrophysical Journal Letters
        Published version
        https://doi.org/10.1088/2041-8205/792/2/L37
        Other links
        http://hdl.handle.net/2299/16356
        Metadata
        Show full item record
        Keep in touch

        © 2019 University of Hertfordshire

        I want to...

        • Apply for a course
        • Download a Prospectus
        • Find a job at the University
        • Make a complaint
        • Contact the Press Office

        Go to...

        • Accommodation booking
        • Your student record
        • Bayfordbury
        • KASPAR
        • UH Arts

        The small print

        • Terms of use
        • Privacy and cookies
        • Criminal Finances Act 2017
        • Modern Slavery Act 2015
        • Sitemap

        Find/Contact us

        • T: +44 (0)1707 284000
        • E: ask@herts.ac.uk
        • Where to find us
        • Parking
        • hr
        • qaa
        • stonewall
        • AMBA
        • ECU Race Charter
        • disability confident
        • AthenaSwan