The magnituderedshift relation in a locally inhomogeneous universe
Abstract
We consider the question of modification of the magnituderedshift relation in a locally inhomogeneous universe. It is shown that, although the conservation of photon flux requires that the luminosity distance in both a standard cosmological model and a locally inhomogeneous universe be statistically equal, this does not require the apparent magnitude in the two cases have the same average value. Based on point model approximations for inhomogeneities and background sources, the correction to the magnituderedshift relation is computed for cosmological model {OMEGA}=1 and α^{tilda}^=0. It is pointed out that the correction is of significance for the number counts of quasars, as well as the measurement of deceleration parameter q_0_.
 Publication:

Astronomy and Astrophysics
 Pub Date:
 November 1990
 Bibcode:
 1990A&A...239...29W
 Keywords:

 Computational Astrophysics;
 Gravitational Lenses;
 Red Shift;
 Universe;
 Astronomical Models;
 Luminosity;
 Magnitude;
 Photons;
 Quasars;
 Astrophysics