The dark matter density problem in massive disk galaxies
| dc.creator | Weiner, Benjamin J. | |
| dc.date | 2003-10-22 | |
| dc.date.accessioned | 2026-07-07T02:10:46Z | |
| dc.date.available | 2026-07-07T02:10:46Z | |
| dc.description | I discuss measurements of disk mass from non-circular streaming motions of gas in the barred galaxies NGC 3095 and NGC 4123. In these galaxies with strong shocks and non-circular motions, the inner regions must be disk-dominated to reproduce the shocks. This requires dark matter halos of low central density and low concentration, compared to LCDM halo predictions. In addition, the baryonic collapse to a disk should have compressed the halo and increased the dark matter density, which sharpens the disagreement. One possible resolution is a substantial amount of angular momentum transfer from disk to halo, but this is not particularly attractive nor elegant. | |
| dc.description | 6 pages, 4 figures, to appear in the proceedings of IAU Symposium 220, "Dark matter in galaxies", Sydney, July 2003, eds. S. Ryder, D.J. Pisano, M. Walker and K. Freeman | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0310666 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0310666 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/6846 | |
| dc.subject | Astrophysics | |
| dc.title | The dark matter density problem in massive disk galaxies | |
| dc.type | text |