Cygnus A and Other 3CR Sources in Cosmological Tests
| dc.creator | Guerra, Erick J. | |
| dc.creator | Daly, Ruth A. | |
| dc.date | 1995-06-12 | |
| dc.date.accessioned | 2026-07-07T02:19:52Z | |
| dc.date.available | 2026-07-07T02:19:52Z | |
| dc.description | Powerful extended radio galaxies like Cygnus A can be used for cosmological tests. The characteristic, time-independent length $D_*$ for several radio sources is calculated and compared to the average physical length for a sample of radio galaxies. The ratio of these two lengths as a function of redshift is used to constrain cosmological parameters. Cygnus A is the only low-redshift ($z<0.5$) radio galaxy for which we have an estimate for $D_*$. We comment on the sensitivity to this one low-redshift point, and results including and excluding Cygnus A are shown. A low density universe is favored, and the one free model parameter is relatively well constrained. | |
| dc.description | 8 pages, 6 figures in text, uuencoded compressed postscript file. To appear in the proceedings of the Cygnus A Workshop | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9506078 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9506078 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/10034 | |
| dc.subject | Astrophysics | |
| dc.title | Cygnus A and Other 3CR Sources in Cosmological Tests | |
| dc.type | text |