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

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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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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.",
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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

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