A model for the gravitational lens system 2237+0305

Details A model for the gravitational lens system 2237+0305 A model for the gravitational lens system 2237+0305

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....96.1570k&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 96, Nov. 1988, p. 1570-1574.

Mathematics

Logic

82

Astronomical Models, Gravitational Lenses, Quasars, Spiral Galaxies, Brightness Distribution, Galactic Nuclei, Hubble Constant, Mass To Light Ratios, Red Shift

Scientific paper

The authors construct a mass model for the lensing spiral galaxy (z ≈ 0.039) in the 2237+0305 system that successfully accounts for most of the known properties of the four QSO (z ≈ 1.7) images. Both a de Vaucouleurs law and a King profile mass distribution work well in reproducing the observed image positions. The galaxy scale length and velocity dispersion for both models are consistent with the observed properties of other nearby spiral galaxies of similar morphological type. The authors recompute the a priori probability of serendipitously discovering a lensed QSO in the spectrum of a nearby galaxy to be less than 1%.

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