A candidate gravitational lens in the Hubble Deep Field
نویسندگان
چکیده
The discovery of HDF J123652+621227, a candidate gravitational lens in the HDF, is reported. This lens may be multiply imaging several optical sources at different redshifts. If follow-up spectroscopy of the lens and the brightest image confirms this hypothesis, observations of this system alone can be used to obtain an estimate of the redshift distribution at extremely faint flux levels. Subject headings: Gravitational Lensing — Galaxies: individual: HDF J123652+621227
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A gravitational lens in the Hubble Deep Field
Cosmologically distant galaxies ought to act as multiply imaging gravitational lenses for a fraction ∼ 0.002−0.005 of background sources.[1, 2, 3] This prediction is being borne out by surveys of flat spectrum radio sources[4, 5] and optical surveys.[6, 7, 8] The incidence and character of strong gravitational lenses provide an important constraint on the source redshift distribution and world ...
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