Physics – Optics
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aps..apr.r9003l&link_type=abstract
American Physical Society, April Meeting, 2003, April 5-8, 2003 Philadelphia, Pennsylvania, MEETING ID: APR03, abstract #R9.003
Physics
Optics
Scientific paper
While it is commonly thought that the observed cosmic redshifts are caused by the expansion of space, there are some puzzles. For example, the high redshifts of numerous quasars place them at such immense distances that they require fantastic energy sources (postulated to be black holes) to explain their high observed luminosities. The very high redshifts also imply high expansion speeds, approaching the speed of light. These high quasar redshifts are also inconsistent with their apparent proximity to low redshift galaxies. But if the quasar redshifts are caused, at least in part, by another mechanism than expansion, then the observed quasar-galaxy proximity could be correct and the energy and speed problems vanish. A physical mechanism that produces redshifts that can mimic those produced by expansion is scattering from a random medium with dynamic correlations. The basic theory of this mechanism was reviewed in the companion presentation by Walsh and Lama. Here we examine the application of the theory to quasars by Daniel James (Pure Appl Optics vol 7, p959, 1998) and try to draw some concrete conclusions about the relevancy of the effect. While the main features of expansion redshifts are reproduced by this mechanism, there are differences that could distinguish between the mechanisms.
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