QSO lensing

M. Miranda, P. Jetzer, Andrea Maccio

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
Pages1731-1733
Number of pages3
StatePublished - Dec 1 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

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

Fingerprint

quasars
substructures
galaxies
gravitational lenses
visual perception
cusps
mass distribution
halos
lenses
anomalies
probes
configurations
predictions
simulation

Keywords

  • Gravitational lensing

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Miranda, M., Jetzer, P., & Maccio, A. (2008). QSO lensing. In 11th 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 (pp. 1731-1733)

QSO lensing. / Miranda, M.; Jetzer, P.; Maccio, Andrea.

11th 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. 2008. p. 1731-1733.

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

Miranda, M, Jetzer, P & Maccio, A 2008, QSO lensing. in 11th 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. pp. 1731-1733, 11th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories, MG 2006, Berlin, Germany, 7/23/06.
Miranda M, Jetzer P, Maccio A. QSO lensing. In 11th 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. 2008. p. 1731-1733
Miranda, M. ; Jetzer, P. ; Maccio, Andrea. / QSO lensing. 11th 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. 2008. pp. 1731-1733
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