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Australian Human Resources Institute Diversity Awards 2013 Finalist

Nicky Agius (UCLan)

"Dusty Early-Type Galaxies"

Abstract. Early-type galaxies (ETGs) are known for being generally smooth, passive, red objects with no spiral arms, but have been shown to contain a fairly well-mixed interstellar medium with multiple dust and gas components. With the aid of recent results from Herschel-ATLAS and GAMA, a sample of 508 morphologically optically selected ETGs detected in the sub-mm has been created. By comparing and contrasting this sample with an optically selected sample of ETGs undetected in the sub-mm, we explore their relative physical properties. Statistical testing shows that these host galaxy properties have different distributions for the two samples. The dusty ETG SPIRE data are then fit with a modified Planck function, giving us mass and temperature information for the cold dust. We explore new template fitting techniques, which exploit the multiple potential dust heating mechanisms in these ETGs.

Held in the AAO Conference Room at 02:00 PM on Wednesday, 13 June 2012