A new method to quantify X-ray substructure in clusters of galaxies

Details A new method to quantify X-ray substructure in clusters of galaxies A new method to quantify X-ray substructure in clusters of galaxies

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1248..285a&link_type=abstract

X-RAY ASTRONOMY 2009; PRESENT STATUS, MULTI-WAVELENGTH APPROACH AND FUTURE PERSPECTIVES: Proceedings of the International Confer

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Clusters Of Galaxies, Brightness, Astronomical Telescopes, Redshift, Magellanic Clouds And Other Irregular Galaxies, Luminosities, Magnitudes, Effective Temperatures, Colors, And Spectral Classification, Astrometric And Interferometric Instruments, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies

Scientific paper

We present a new method to quantify substructures in clusters of galaxies, based on the analysis of the number and intensity of structures detected by an algorithm of the type ``friends-of-friends''. This analysis is done in a residual image that is the result of the subtraction of a surface brightness model, obtained by fitting a two-dimensional analytical model (β-model or Sérsic profile) with elliptical symmetry, from the X-ray image. Our method was applied to 47 clusters observed by the Chandra Space Telescope for more than 10 ks that are in the redshift range zɛ[0.02, 0.2]. We obtained relations between the substructure level and physical quantities, such as the intra-cluster metallicity, total mass, X-ray luminosity, temperature, and cluster redshift. However, because of the 2 pages limit of this proceeding, we just present here how the substructure level changes with cluster morphology.

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