Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...206..199l&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 206, no. 2, Nov. 1988, p. 199-203.
Astronomy and Astrophysics
Astrophysics
22
Cosmology, Gravitational Lenses, Isotropy, Relic Radiation, Wave Propagation, Correlation, Evolution (Development), Light Emission, Perturbation Theory, Red Shift
Scientific paper
Light propagation effects in an inhomogeneous universe impose difficulties on a straightforward association of linear and angular scales. The existence of structure, i.e. clumpiness, can lead to two effects: shrinking of angular scales due to decreased Ricci focusing, implying for example that microwave background anisotropies of a given metric size at recombination could be observed on angular scales up to 250 times smaller than in the usual flat dust model, and small scale smearing by gravitational lensing from early almost smooth density perturbations, acting to isotropize the cosmic microwave background. The actual extent of these effects is estimated to be shrinking by 10 or less and dilution by two or less. Possible constraints on the energy density of nondust components in generalized Friedmann-Lemaitre cosmologies are also discussed.
No associations
LandOfFree
Isotropy of the microwave background by gravitational lensing 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 Isotropy of the microwave background by gravitational lensing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Isotropy of the microwave background by gravitational lensing will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1825100