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SUMMARY:New Results on Galaxy Mergers: Galaxy Formation\, Cosmology\, and 
 Gravitational Waves - Christopher Conselice (University of Nottingham)
DTSTART:20200310T160000Z
DTEND:20200310T170000Z
UID:TALK140671@talks.cam.ac.uk
CONTACT:Asa Bluck
DESCRIPTION:I will present new results on observed galaxy mergers using a 
 few different surveys and projects.  The first is a galaxy pair methodolog
 y within the REFINE survey - an analysis of the 3 deepest large near-infra
 red extragalactic fields.  I will discuss the role of both major and minor
  mergers in the formation of galaxies up to z~6.  I will then discuss new 
 results using machine learning on the Illustris cosmological simulation to
  determine the merger history with deep learning by training a machine on 
 the simulation and then applying the supervised learning to resolved imagi
 ng data from the Hubble Space Telescope. I will show that these two method
 s of finding mergers are consistent and provides further evidence for the 
 existence of dark matter in a new way.  I will also discuss how these resu
 lts provide unique information about the origin of gravitational waves dis
 covered by LIGO/VIrgo and predictions for the number of sources that LISA 
 will discover at high redshift.
LOCATION:Sackler Lecture Theatre\, Institute of Astronomy\, Madingley Rise
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