High resolution optical imaging of the gravitational lens system B1422+231

Details High resolution optical imaging of the gravitational lens system B1422+231 High resolution optical imaging of the gravitational lens system B1422+231

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aj....107...28y&link_type=abstract

The Astronomical Journal, vol. 107, no. 1, p. 28-34

Astronomy and Astrophysics

Astronomy

24

Galactic Evolution, Gravitational Lenses, Imaging Techniques, Radio Galaxies, Red Shift, Stellar Magnitude, Astronomical Photometry, Emission Spectra, High Resolution, Mass To Light Ratios, Radio Astronomy, Radio Sources (Astronomy)

Scientific paper

High resolution images of the gravitational lens candidate B1422+231 in Gunn r and g have been obtained using the HRCam at Canada-France-Hawaii Telescope (CFHT). These images have full width at half maximum (FWHM) of 0.36 sec, to 0.46 sec, sufficient to resolve all four components of the lens, which have a smallest separation of 0.5 sec. The four components are achromatic and have positions which are identical to those of the radio image taken by Patnaik et al. (1992), further confirming the gravitational lens interpretation. Component A in the optical image is approximately 0.30 mag fainter than the brightest component, whereas the radio image shows them to be of equal brightness, suggesting that the source is variable. After subtraction of the components, a faint (r approximately 21.8 mag) galaxy is detected, which is most likely responsible for the lensing. The photometric properties and mass-to-light ratio of this galaxy suggest that it is probably an early-type galaxy at a redshift between 0.4 and 0.8.

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