Gravitational lenses and decay of dark matter

Details Gravitational lenses and decay of dark matter Gravitational lenses and decay of dark matter

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...315l..83d&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 315, April 15, 1987, p. L83-L87.

Statistics

Computation

7

Cosmology, Dark Matter, Decay, Galactic Clusters, Gravitational Lenses, Quasars, Computational Astrophysics, Galactic Evolution, Hubble Constant, Red Shift, Stellar Gravitation

Scientific paper

The puzzles associated with the observed gravitationally lensed quasars, i.e., the large splittings, the even number of images, and the absence of obvious lensing objects, can be explained if the lenses are normal galaxies and clusters at an early stage of evolution when they were more massive and more compact by a factor ≡4. Such evolution is a natural consequence of the decaying particle cosmology. If Ωnr is the present contribution to the critical density by nonrelativistic particles, then with Ωnr ≈ 0.2, a characteristic decay epoch of zd ≈ 1.2 (which corresponds to an initial ratio between the stable and unstable matter of β ≈ 0.07) is consistent with all the observed image systems. Galaxies and clusters are predicted to be at least twice as compact at z ≈ 1.

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