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Luminosity Inhomogeneity of Quasars and the Upper Limit of the Density Fluctuation in the Universe

Published online by Cambridge University Press:  08 February 2017

Yaoquan Chu  and
Lizhi Fang
Yaoquan Chu
Affiliation:
Center for Astrophysics University of Science and Technology of China Hefei, China
Lizhi Fang
Affiliation:
Beijing Astronomical Observatory Beijing, China

Abstract

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An upper limit to the amplitude of the overall density fluctuation has been found by means of the gravitational lensing effect of the density inhomogeneity on luminosity of quasars with large redshifts. The observed differences of luminosities of quasars located at different directions are partially given by the lensing effect; therefore, a useful upper limit to the inhomogeneity can be derived.

Type
IV. Extragalactic Background Radiation and Cosmology
Information
Symposium - International Astronomical Union , Volume 139: The Galactic and Extragalactic Background Radiation , 1990 , pp. 418 - 419
Copyright
Copyright © Kluwer 1990 

References

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