Visibility of Gravitational Lenses and the Cosmological Constant Problem

Details Visibility of Gravitational Lenses and the Cosmological Constant Problem Visibility of Gravitational Lenses and the Cosmological Constant Problem

1993-05-06

arxiv.org/abs/astro-ph/9305002v1

Astronomy and Astrophysics

Astrophysics

12 pages, TeX file. Institute for Advanced Study number AST 93/24

Scientific paper

Recent observations suggest appreciable star formation activity in early-type galaxies down to redshift $z\sim 0.5$. If so, there is likely to be dust in these galaxies. We consider the possibility that obscuration by dust can reconcile the observed frequency of gravitational lensing of quasar images with the considerably larger rate predicted in a low density cosmologically flat universe dominated by a cosmological constant.

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