Login | STScI Home | HubbleSite | Copyright, Content Use, and Policies
STScI Webcast

2018 Hot Sci @ STScI

High Galaxy Merger Rates at Three Billion Years

Presented by: Greg Snyder  (Space Telescope Science Institute)
Category: Science Colloquia   Duration: 30 minutes   Broadcast date: June 13, 2018
  • Bookmark/Share

6/13/18 Greg Snyder (STScI) Title: High Galaxy Merger Rates at Three Billion Years Abstract: I will describe efforts to blend cosmological simulations with HST surveys of distant galaxies. Recently, we showed that because galaxies assembled so rapidly, distant mergers are more common than the simplest arguments imply. Further, we improved image-based merger diagnostics by training many-dimensional machine learning classifiers with simulations. By applying these results to data from the CANDELS multi-cycle treasury program, we measured a high galaxy merger rate in the early universe in broad agreement with theory, an important test of our cosmological understanding.