Expanding quasars and the expansion of the universe

Details Expanding quasars and the expansion of the universe Expanding quasars and the expansion of the universe

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...329....1c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 329, June 1, 1988, p. 1-7.

Statistics

Computation

40

Cosmology, Hubble Constant, Quasars, Red Shift, Very Long Base Interferometry, Computational Astrophysics, Line Of Sight, Radio Sources (Astronomy), Universe

Scientific paper

Thirty-two compact radio sources have both a redshift z and an internal proper motion, mu, measured with VLBI. These two observables are anticorrelated. There is a rough upper limit to mu(z) which falls much faster than 1/(1 + z), the function which describes the limiting proper motion in a simple model in which quasars are all at the same distance, and their various values of z reflect their peculiar valocities. Thus redshift is a measure of distance, unless there is a strong anticorrelation between z and the linear velocity of the VLBI components. Friedmann cosmology describes the upper limit, and a relativistic beam model gives gamma of about 9-18 for the Lorentz factor of the moving components, for H(0) = 100-50 km/s Mpc. In this model most of the sources are aimed close to the line of sight, and Doppler boosting is probably responsible for this selection effect. Relativistic shells expanding into dipole fields do not match the data, unless the Hubble constant is allowed to assume extreme values. Chronometric cosmology does not appear to describe the upper limit to the observed proper motions.

Affiliated with

Also associated with

No associations

Rating

Expanding quasars and the expansion of the universe 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 Expanding quasars and the expansion of the universe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Expanding quasars and the expansion of the universe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1177527