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SUMMARY:Genetically modified galaxies - Nina Roth (UCL)
DTSTART:20160208T130000Z
DTEND:20160208T140000Z
UID:TALK63978@talks.cam.ac.uk
CONTACT:Tommaso Giannantonio
DESCRIPTION:A fundamental difficulty in understanding galaxy formation is 
 that it is a stochastic process by virtue of the Gaussian random initial c
 onditions seeded in the early universe. One way to confront this limitatio
 n is to simulate sufficient numbers of galaxies in a large volume. However
 \, this is computationally expensive and limits the resolution for a singl
 e galaxy. Alternatively\, galaxy formation can be studied in the context o
 f constrained realizations\, where the initial conditions are modified in 
 a well-defined way to control the properties of selected regions.\n\nBuild
 ing on the Hoffman-Ribak algorithm\, we start from a reference simulation 
 with fully random initial conditions\, then make controlled changes to spe
 cific properties of a single halo (such as its mass and merger history). O
 ur method demonstrably makes minimal changes to other properties of the ha
 lo and its environment\, allowing us to isolate the impact of a given modi
 fication.\n\nI will discuss several results of using these "genetically mo
 dified" initial conditions in both dark-matter-only as well as fully hydro
 dynamic cosmological simulations.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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