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Australian Human Resources Institute Diversity Awards 2013 Finalist

Hector Ibarra (INAOE, Mexico)

"A New Twist in Galaxy Cluster Finding: The use of rendering and caustics techniques to solve the substructure problem"

Abstract. We designate, test and implement an approach to determine the principal galaxy cluster properties. The procedure consists in looking for overdensities within a continuous galaxy number density field, followed by the performance of a caustic analysis using the Galaxy and Mass Assembly (GAMA) redshift survey. The caustic analysis is performed to minimize the contribution of nearby substructures. This returns a robust algorithm to determine the cluster mass. Finally, we detect and characterize 93 clusters of galaxies on the GAMA region within the mass range of 3X10^13 to 10^15 solar masses. Using these 93 galaxy clusters we explore the mass-luminosity relationship at the cluster scale and its implications with their central and satellite galaxies.

Held in the AAO Meeting Room (Room 7, 1st Floor, Building 2) at 11:00 AM on Thursday, 21 March 2013