High-resolution rotation curves of LSB galaxies: Mass Models
| dc.creator | de Blok, Erwin | |
| dc.creator | McGaugh, Stacy | |
| dc.creator | Rubin, Vera | |
| dc.date | 2001-07-19 | |
| dc.date.accessioned | 2026-07-07T01:59:22Z | |
| dc.date.available | 2026-07-07T01:59:22Z | |
| dc.description | We present mass models for a sample of 30 high-resolution rotation curves of low surface brightness (LSB) galaxies. We fit both pseudo-isothermal (core-dominated) and Cold Dark Matter (CDM) (cusp-dominated) halos for a wide variety of assumptions about the stellar mass-to-light ratio. We find that the pseudo-isothermal model provides superior fits. CDM fits show systematic deviations from the data, and often have a small statistical likelihood of being the appropriate model. The distribution of concentration parameters is too broad, and has too low a mean, to be explained by $Λ$CDM. This failing becomes more severe as increasing allowance is made for stellar mass: NFW fits require uncomfortably low mass-to-light ratios. In contrast, the maximum disk procedure does often succeed in predicting the inner shape of the rotation curves, but requires uncomfortably large stellar mass-to- light ratios. The data do admit reasonable stellar population mass-to-light ratios if halos have cores rather than cusps. | |
| dc.description | Accepted for publication in AJ. Full-resolution figures available at http://www.atnf.csiro.au/~edeblok/papers/deblok.ps.gz . Electronic data available at Journal or http://www.atnf.csiro.au/~edeblok/data or http://www.astro.umd.edu/~ssm/data | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0107366 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0107366 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/3086 | |
| dc.subject | Astrophysics | |
| dc.title | High-resolution rotation curves of LSB galaxies: Mass Models | |
| dc.type | text |