A higher limit to the mean galaxy mass allowed by gravitational lens image distortion

Details A higher limit to the mean galaxy mass allowed by gravitational lens image distortion A higher limit to the mean galaxy mass allowed by gravitational lens image distortion

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.314..721p&link_type=abstract

Nature (ISSN 0028-0836), vol. 314, April 25, 1985, p. 721.

Mathematics

Logic

9

Galactic Clusters, Gravitational Lenses, Mass, Distortion, Mass To Light Ratios

Scientific paper

Tyson et al., in a recent discussion of the gravitational lens distortion, by foreground galaxies, of the images of distant ("background") galaxies, claim that their non-detection of this effect implies a low mean mass for the foreground galaxies. It would require that the cosmological mass density in the form of galaxies is Ωgal < 0.03. This letter shows that by including the effects of galaxy clustering the limit is raised to Ωgal ⪉ 0.2.

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