a New Gravitational Lens Candidate: QSO 0449-1645 a & B

Details a New Gravitational Lens Candidate: QSO 0449-1645 a & B a New Gravitational Lens Candidate: QSO 0449-1645 a & B

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996hst..prop.6811s&link_type=abstract

HST Proposal ID #6811

Mathematics

Logic

Hst Proposal Id #6811 Cosmology

Scientific paper

In the context of a systematic optical survey forgravitational lenses among highly luminous quasars (HLQs), wehave identified one new promising case of multiply imagedquasar: QSO 0449-1645 (z = 2.61, V = 17.6) has been imagedwith the Nordic Optical Telescope and found to consist of twopoint-like components separated by 0.56", with a (possiblyvariable) 0.2 magnitude difference in R and B. We propose totake advantage of the excellent angular resolution of HST toobtain FOS spectra of these two very close quasi-stellar imageswith the 0.3" and 1.0" apertures. Suchdata will enable us to identify the real nature (lensed or notlensed) of this system and set interesting constraints on thelensing (or other) model. Furthermore, these results willcontribute to the independent determination of fundamentalparameters of the Universe (cf. the cosmological constant,density of compact objects, velocity dispersion sigma_* ofgalaxies, etc.) via the application of gravitational lensingstatistics.

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