VV 172 - an effect of gravitational amplification by a massive halo?

Details VV 172 - an effect of gravitational amplification by a massive halo? VV 172 - an effect of gravitational amplification by a massive halo?

Feb 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...155..420h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 155, no. 2, Feb. 1986, p. 420-422.

Astronomy and Astrophysics

Astrophysics

20

Galaxies, Gravitational Lenses, Red Shift, Galactic Structure, Halos, Mass To Light Ratios

Scientific paper

The authors show that the well known quintet of galaxies VV 172, which contains a discrepant redshift member, may be fully understood when accounting for the effects of gravitational amplification by the halo of the foreground quartet on the more distant galaxy. Gravitational lensing increases the luminosity, diameter and chance probability of association of background galaxies in such a way that the presently known number of similar associations containing a discrepant redshift is not any more found to be improbable.

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