Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986sci...233.1183t&link_type=abstract
Science (ISSN 0036-8075), vol. 233, Sept. 12, 1986, p. 1183-1187.
Astronomy and Astrophysics
Astronomy
4
Astronomical Models, Faint Objects, Image Analysis, Quasars, Stellar Color, Charge Coupled Devices, Gravitational Lenses, Red Shift
Scientific paper
Color images of faint objects were used to test two hypotheses for the quasi-stellar object (QSO) pair 1146+111B,C: gravitational lens or massive string. Blue, red, and near-infrared CCD (charge-coupled device) images of the field of this QSO pair were examined for gravitational lens multiple-image candidates for all four QSO's in the field (B,C,D, and E). No third image of 1146+111B,C was found, down to 4 magnitudes fainter than BC. This result implies a compact lens mass distribution, if B and C are images of the same QSO. Under the hypothesis that B and C are lensed images, the color data severely restrict the possible lens models and imaged QSO multiplicities. The simplest model consistent with all the data is the no-lens, no-string hypothesis: B and C probably are separate QSO's, but with some spectral similarities.
Gullixson Craig A.
Tyson Anthony J.
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