University of Cambridge > Talks.cam > The Kavli Lectures > Clash of the Titans: galaxy collisions in the nearby universe

Clash of the Titans: galaxy collisions in the nearby universe

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Kavli Lecture Series

Astronomy’s current model of galaxy evolution is built on a foundation of hierarchical growth, in which small galaxies merge together to form larger ones. In addition to the simple accrual of mass, this merging process is predicted to fundamentally change the galaxies’ properties, such as dramatic morphological transformations, the triggering of bursts of star formation and high rates of accretion onto the central supermassive black hole. In this talk I will explain the physical processes behind these predictions, and present the observations that we are performing in order to test the theory. Although many of the predictions are indeed borne out by experiment, there have been some surprising conflicts as well, that demand revisions to our models of how mergers shape galaxy evolution.

This talk is part of the The Kavli Lectures series.

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