An independent test for the cosmological constant.
Abstract
It is shown that the emission from highredshift extragalactic objects, scattered by the intergalactic electron gas at angular distance theta, has, in comparison to directly observed light from the same quasars or galaxies, a redshift excess of Delta z greater than 0, which is sensitive only to the cosmological constant in the range absolute value of lambda = absolute value Omega0/2  q0 not greater than 1, or absolute value of Lambda/csquared not greater than 2 x 10 to the 56th (H0/75)/sq cm. The same holds for another version of the Delta z/theta test based on measurements of angular radii of Lalphavoids around quasars with lineofsight extensions Delta z.
 Publication:

Pisma v Astronomicheskii Zhurnal
 Pub Date:
 October 1990
 Bibcode:
 1990PAZh...16..901S
 Keywords:

 Cosmology;
 Extragalactic Radio Sources;
 Intergalactic Media;
 Red Shift;
 Constants;
 Einstein Equations;
 Lyman Alpha Radiation;
 Quasars;
 Astrophysics