The dynamics of face-on galaxies in MOND

    Research output: Contribution to journalArticle

    Abstract

    We present an overview of the dynamical analysis using the DiskMass Survey's measurements of vertical velocity dispersions of nearly face-on galaxy disks in both MOND and the standard model of cosmology. We found that the only, even partly realistic, solution is to have galaxy disks that are twice as thin as current surveys suggest. In the standard theory, with cold dark matter, after improving upon the original analysis we found the typical mass-to-light ratios to be less than 0.1 for almost half the sample. This is unrealistically low compared to the 0.6 found by stellar evolution models. Both these issues would disappear if the stellar vertical velocity dispersions were incorrectly measured and are actually 30% larger.

    Original languageEnglish
    Article number032001
    JournalJournal of Physics: Conference Series
    Volume718
    Issue number3
    DOIs
    Publication statusPublished - Jun 9 2016

    Fingerprint

    disk galaxies
    galaxies
    mass to light ratios
    stellar evolution
    cosmology
    dark matter

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy(all)

    Cite this

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    title = "The dynamics of face-on galaxies in MOND",
    abstract = "We present an overview of the dynamical analysis using the DiskMass Survey's measurements of vertical velocity dispersions of nearly face-on galaxy disks in both MOND and the standard model of cosmology. We found that the only, even partly realistic, solution is to have galaxy disks that are twice as thin as current surveys suggest. In the standard theory, with cold dark matter, after improving upon the original analysis we found the typical mass-to-light ratios to be less than 0.1 for almost half the sample. This is unrealistically low compared to the 0.6 found by stellar evolution models. Both these issues would disappear if the stellar vertical velocity dispersions were incorrectly measured and are actually 30{\%} larger.",
    author = "Angus, {Garry W.}",
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    language = "English",
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    The dynamics of face-on galaxies in MOND. / Angus, Garry W.

    In: Journal of Physics: Conference Series, Vol. 718, No. 3, 032001, 09.06.2016.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - The dynamics of face-on galaxies in MOND

    AU - Angus, Garry W.

    PY - 2016/6/9

    Y1 - 2016/6/9

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    AB - We present an overview of the dynamical analysis using the DiskMass Survey's measurements of vertical velocity dispersions of nearly face-on galaxy disks in both MOND and the standard model of cosmology. We found that the only, even partly realistic, solution is to have galaxy disks that are twice as thin as current surveys suggest. In the standard theory, with cold dark matter, after improving upon the original analysis we found the typical mass-to-light ratios to be less than 0.1 for almost half the sample. This is unrealistically low compared to the 0.6 found by stellar evolution models. Both these issues would disappear if the stellar vertical velocity dispersions were incorrectly measured and are actually 30% larger.

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