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 language | English |
|---|---|
| Article number | 032001 |
| Journal | Journal of Physics: Conference Series |
| Volume | 718 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Jun 9 2016 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
Cite this
}
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 journal › Article
TY - JOUR
T1 - The dynamics of face-on galaxies in MOND
AU - Angus, Garry W.
PY - 2016/6/9
Y1 - 2016/6/9
N2 - 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.
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.
UR - http://www.scopus.com/inward/record.url?scp=84981165038&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84981165038&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/718/3/032001
DO - 10.1088/1742-6596/718/3/032001
M3 - Article
VL - 718
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 3
M1 - 032001
ER -