How Far Out Must We Go to Get into the Hubble Flow?
Abstract
The answer, we shall see, must be z equals 3if the expansion is flat, matterdominated, hence slow. I show that gravitational lenses are the best hope for definitely getting out into the Hubble flow and hence for measuring the true values of the cosmological parameters. The source of one known lens system, B1422+231, is definitely in the Hubble flow.
 Publication:

The Astrophysical Journal
 Pub Date:
 February 1999
 DOI:
 10.1086/306725
 Bibcode:
 1999ApJ...511..546T
 Keywords:

 COSMOLOGY: THEORY;
 COSMOLOGY: DISTANCE SCALE;
 COSMOLOGY: GRAVITATIONAL LENSING;
 COSMOLOGY: LARGESCALE STRUCTURE OF UNIVERSE;
 GALAXIES: QUASARS: INDIVIDUAL: ALPHANUMERIC: B1422+231;
 Cosmology: Theory;
 Cosmology: Distance Scale;
 Cosmology: Gravitational Lensing;
 Cosmology: LargeScale Structure of Universe;
 Galaxies: Quasars: Individual: Alphanumeric: B1422+231