Cygnus A and Other 3CR Sources in Cosmological Tests

Details Cygnus A and Other 3CR Sources in Cosmological Tests Cygnus A and Other 3CR Sources in Cosmological Tests

1995-06-12

arxiv.org/abs/astro-ph/9506078v1

Astronomy and Astrophysics

Astrophysics

8 pages, 6 figures in text, uuencoded compressed postscript file. To appear in the proceedings of the Cygnus A Workshop

Scientific paper

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.

Affiliated with

Also associated with

No associations

Rating

Cygnus A and Other 3CR Sources in Cosmological Tests does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Cygnus A and Other 3CR Sources in Cosmological Tests, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cygnus A and Other 3CR Sources in Cosmological Tests will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-108495