Spectroscopic evidence supporting the gravitational lens hypothesis for 1635+267 A,B

Details Spectroscopic evidence supporting the gravitational lens hypothesis for 1635+267 A,B Spectroscopic evidence supporting the gravitational lens hypothesis for 1635+267 A,B

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....96.1682t&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 96, Nov. 1988, p. 1682-1689.

Astronomy and Astrophysics

Astronomy

16

Astronomical Spectroscopy, Gravitational Lenses, Quasars, Brightness Distribution, Emission Spectra, Red Shift, Signal To Noise Ratios, Spectral Line Width, Very Large Array (Vla)

Scientific paper

The gravitational lens hypothesis is tested for 1613+267 A,B by comparing the detailed line widths and shapes of the 2799-A Mg II and semiforbidden 1909-A C-III lines in each component. Following subtraction of an interpolating polynomial fit to the continua and the determination of a single optimum scaling factor (an amplification ratio of 2.83), reasonable agreement between the profiles of both lines in the two composites is obtained. Comparison of these lines to those in an unrelated quasar with a similar redshift and apparent magnitude does not produce a good match. It is suggested that the observed match in the 1635+267 A,B spectra arises from gravitational lensing.

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