Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...281..388a&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 281, no. 2, p. 388-394
Astronomy and Astrophysics
Astronomy
19
Gravitational Effects, Gravitational Lenses, Radio Emission, Radio Sources (Astronomy), Astronomical Photography, Astronomical Photometry, Astronomical Spectroscopy, Red Shift, Spectrographs, Spectroscopic Telescopes
Scientific paper
Deep imaging of MG J0414+0534 with R and I filters reveals a faint, fuzzy and red object at the exact location expected for a lensing galaxy in the gravitational mirage hypothesis. Furthermore, the (extremely red and almost featureless) spectra of the 2 brightest components are very similar. These are strong indications that the system results from multiple gravitational imaging of a single source, but the nature of this source is not yet clear. It could be the nucleus of a low metallicity galaxy at a high redshift or a new type of object. Significant differences are observed between the flux ratios of the images at radio and optical wavelenghts. The most likely explanation for this effect is a differential amplification of the image pair A1-A2 because of the large magnification gradient near a caustic.
Angonin-Willaime Marie-Christine
Hammer Francçois
Magain Pierre
Vanderriest Ch.
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