Quasar Lensing

Details Quasar Lensing Quasar Lensing

2002-08-01

arxiv.org/abs/astro-ph/0208043v1

Lect.Notes Phys. 608 (2002) 1-54

Astronomy and Astrophysics

Astrophysics

Review on quasar lensing. Part of a LNP Topical Volume "Dark matter and gravitational lensing" (eds. Courbin, Minniti) to be p

Scientific paper

Massive structures, such as galaxies, act as strong gravitational lenses on background sources. When the background source is a quasar, several lensed images are seen, as magnified or de-magnified versions of the same object. The detailed study of the image configuration and the measurement of ``time-delays'' between the images yield estimates of the Hubble parameter H_0. We describe in a simple way the phenomenon of strong lensing and review recent progress made in the field, including microlensing by stars in the main lensing galaxy.

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