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Gravitational Lens Effects of Dark Matter of Milky Way

Published online by Cambridge University Press:  19 July 2016

C. M. Xu  and
X. J. Wu
C. M. Xu
Affiliation:
Department of Physics, Fudan University, Shanghai P. R. China
X. J. Wu
Affiliation:
Department of Physics, Fudan University, Shanghai P. R. China

Abstract

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In this paper, dark matter of Milky Way is discussed as a transparent gravitational lens. The mass distribution of Milky Way is composed of spheroid, disk and dark matter (corona). The trajectory of light ray influnced by Milky Way has been calculated numerically. The deflecting angle to a extragalactic souce is changed with different observational direction and is about several seconds in maximum. The brightness amplification ratio Kv of extragalactic background radiation is also derived from the redistribution of intensity due to the gravitational lens effects of Milky Way, ΔKv/Kv is about 10−5 in maximum. Kv has been expanding to multipole with spherical harmonics by means of Kv distribution in celestial sphere. Dipole and qudrapole are about 3×10−6 and 7×10−6 respectively, which might be added to the observational data of microwave background radiation. A measurement method to pick out the gravitational lens effects from real cosmological anisotropy has been proposed. (ref. 8)

Type
Chapter XIII: Gravitational Lenses
Information
Symposium - International Astronomical Union , Volume 124: Observational Cosmology , 1987 , pp. 771 - 773
Copyright
Copyright © Reidel 1987 

References

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