Gravitational lensing of quasar 0957+561 and the determination of H0

Details Gravitational lensing of quasar 0957+561 and the determination of H0 Gravitational lensing of quasar 0957+561 and the determination of H0

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aipc..336..343r&link_type=abstract

Dark matter. AIP Conference Proceedings, Volume 336, pp. 343-346 (1995).

Astronomy and Astrophysics

Astronomy

3

Astronomical Observations, Quasars, Gravitational Lenses And Luminous Arcs, Observational Cosmology

Scientific paper

We present results of a deep imaging study of the cluster lensing the double quasar Q0957+561. Using data obtained at KPNO and CFHT we have detected distortions in the lensed blue background galaxy population. From these arclet distortions we have constructed a map of the mass density in the field of the double QSO. We use this map to provide constraints on the mass concentrations responsible for the lensing. Under these constraints in conjunction with mass models and the known time delay between the A and B images we place limits on the value of the Hubble constant.

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