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Australian Human Resources Institute Diversity Awards 2013 Finalist

Chiara Tonini, Melbourne ()

"The hierarchical build-up of the Tully-Fisher relation"

Abstract. The evolution of the Tully-Fisher relation can be used as a tool to study the assembly of galaxies in a hierarchical context. I will present the predictions of a semi-analytic model of galaxy formation regarding the TF relation up to redshift z~1, in various photometric bands. I will discuss how the comparison with observations highlights merits and flaws of the current models. Among the problems, the most relevant seems to involve unrealistic star-formation histories in spiral galaxies. A morphological differentiation of the TF is predicted and observed, but the hierarchical assembly mechanism prevents the model from matching the slope at the high-mass end.

Held in the AAO Conference room at 03:30 PM on Thursday, 27 January 2011