Gravitational lensing as a probe of structure

Details Gravitational lensing as a probe of structure Gravitational lensing as a probe of structure

2003-06-23

arxiv.org/abs/astro-ph/0306465v1

Astronomy and Astrophysics

Astrophysics

43 pages, 7 figures, to appear in the proceedings of the XIV Canary Islands Winter School of Astrophysics "Dark Matter and Dar

Scientific paper

Gravitational lensing has become one of the most interesting tools to study the mass distribution in the Universe. Since gravitational light deflection is independent of the nature and state of the matter, it is ideally suited to investigate the distribution of all (and thus also of dark) matter in the Universe. Lensing results have now become available over a wide range of scales, from the search for MACHOs in the Galactic halo, to the mass distribution in galaxies and clusters of galaxies, and the statistical properties of the large-scale matter distribution in the Universe. Here, after introducing the concepts of strong and weak lensing, several applications are outlined, from strong lensing by galaxies, to strong and weak lensing by clusters and the lensing properties of the large-scale structure.

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