An estimation of the parameters of the gravitational lens 2237 + 0305

Details An estimation of the parameters of the gravitational lens 2237 + 0305 An estimation of the parameters of the gravitational lens 2237 + 0305

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pazh...17..331m&link_type=abstract

Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 17, April 1991, p. 331-340. In Russian. In Russian. In Russian.

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Gravitational Fields, Gravitational Lenses, Quasars, Spiral Galaxies, Astronomical Models, Galactic Structure

Scientific paper

The possibility of the appearance of cross-like quasar (Z is approximately equal to 1.7) images due to focusing by the foreground spiral galaxy 2237 + 0305 (Z is approximately equal to 0.04) gravitational field is investigated. A model of a galaxy lens is considered in the form of a massive disk with central nucleus (point mass, isothermical sphere, and Plammer's sphere). The values of the disk mass (about 10 to the 11th solar masses) and the spherical nucleus (about 10 to the 10th solar masses) are obtained. The galactic mass estimation agrees with the traditional notions for this type of spiral galaxies. In the case of the central mass, the rated positional angle of the galaxy's large axis exhibits approximately a 10-percent difference with the observed figure.

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