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Fossil groups by gravitational lensing

Grant number: 10/04009-4
Support type:Scholarships in Brazil - Master
Effective date (Start): August 01, 2010
Effective date (End): July 31, 2012
Field of knowledge:Physical Sciences and Mathematics - Astronomy
Principal Investigator:Eduardo Serra Cypriano
Grantee:Felipe Nascimento de Souza
Home Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

Fossil groups, which are galaxy systems where the gap in magnitude between the twofirst ranked members is larger than two magnitudes, are probably the most relaxed darkmatter haloes with high masses (M > 10^13M_Sun). In this project, by the use of imaging datacoming from world class telescopes (4-6m) with large field-of-view, we will investigatethese groups by using weak-lensing techniques. In particular we intend to find out whetheror not fossils groups are indeed relaxed systems and whether they are more concentratedthan normal galaxy systems, as expected.