A New Method to Quantify X-ray Substructures in Clusters of Galaxies

• Grant number: 11/22796-6
• Support Opportunities: Regular Research Grants - Publications - Scientific article
• Start date: January 01, 2012
• End date: June 30, 2012
• Field of knowledge: Physical Sciences and Mathematics - Astronomy - Extragalactic Astrophysics
• Principal Investigator: Gastão Cesar Bierrenbach Lima Neto
• Grantee: Gastão Cesar Bierrenbach Lima Neto
• Host Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

We present a new method to quantify substructures in clusters of galaxies,based on the analysis of the intensity of structures.This analysis is done in a residual image that is the result of thesubtraction of a surface brightness model, obtained by fitting atwo-dimensional analytical model (beta-model or Sérsic profile) withelliptical symmetry, from the X-ray image.Our method is applied to 34 clusters observed by the Chandra SpaceTelescope that are in the redshift range 0.02