A gravitational lens candidate with an unusually red optical counterpart

Details A gravitational lens candidate with an unusually red optical counterpart A gravitational lens candidate with an unusually red optical counterpart

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....104..968h&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 104, no. 3, Sept. 1992, p. 968-979. Research supported by Alfred P. Sloan Fellowship

Astronomy and Astrophysics

Astronomy

87

Active Galactic Nuclei, Gravitational Lenses, M Stars, Radiant Flux Density, Radio Sources (Astronomy), Stellar Color, Mass To Light Ratios, Optical Properties, Radio Astronomy, Red Shift

Scientific paper

The properties of the strong radio source MG0414 + 0534 are described. It is found to display many of the properties expected in a gravitational lens system. At radio wavelengths and 0.5-arcsec resolution, MG0414 + 0534 is made up of four compact components whose unusual configuration and relative flux densities are similar to those found in confirmed four-image gravitational lens systems. At optical wavelengths three objects are detected, consistent with there being optical objects at the positions of the radio components, given the lower optical resolution. The radio and optical centroid positions agree within the astrometric errors, and the relative ordering of the fluxes is the same. The colors and radiooptical spectral indices are similar, but there are differences larger than the photometric errors and the measured variability (about 30 percent). Extinction by dust might simultaneously explain the unusually red color and the absence of light from a lens.

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