QSO lensing

M. Miranda, P. Jetzer, A. V. Macciò

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Gravitational lenses on arcseconds scales provide a tool to probe the mass distribution in the lensing galaxies at redshift z 0.5-1.0. Image positions can be fitted using simple smooth galaxy mass models, but observed fluxes are more difficult to match. We analyze the effects of substructures in galaxy halos to explain such anomalies in the cusp and fold lensing configurations. In the first case we use detailed numerical simulations combined with a Monte Carlo approach to compare predictions from the ACDM small scale mass function with observed flux ratios. We extended our analysis down to a mass of ≈ 105 M for the subhalos. In the second case we try to constrain, with semianalytical approach, the mass and the position of a substructure by considering its effects on the flux of the images: we add to a smooth lens model, which reproduces well the positions of the images but not the anomalous fluxes, one or two substructures (in the mass range ∼ 106 -108 M) described as singular isothermal spheres. In a work in progress we take into account the effect of substructures along the line of the sight.

Original languageEnglish (US)
Title of host publication11th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories - Proc. of the MG11 Meeting on General Relativity
PublisherWorld Scientific Publishing Co. Pte Ltd
Pages1731-1733
Number of pages3
ISBN (Print)9812834265, 9789812834263
DOIs
StatePublished - 2008
Event11th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories, MG 2006 - Berlin, Germany
Duration: Jul 23 2006Jul 29 2006

Publication series

Name11th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories - Proc. of the MG11 Meeting on General Relativity

Other

Other11th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories, MG 2006
CountryGermany
CityBerlin
Period7/23/067/29/06

Keywords

  • Gravitational lensing

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Fingerprint Dive into the research topics of 'QSO lensing'. Together they form a unique fingerprint.

Cite this