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How to Make Genetically Engineered Halos in Cosmological Simulations

3 May 2021, 12:42 UTC
How to Make Genetically Engineered Halos in Cosmological Simulations
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This guest post was written by Alex Gurvich, a 5th year Ph.D. student at Northwestern University. Alex studies galaxy formation using supercomputer simulations as a member of the FIRE collaboration. When not doing research, he organizes his department’s public outreach efforts. His terminal font is comic sans, and that should tell you all you need to know about him. Title: Genetically modified halos: towards controlled experiments in ΛCDM galaxy formation Authors: Nina Roth, Andrew Pontzen, Hiranya V. Peiris First Author’s Institution: Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT, UK Status: Published in MNRAS Today’s paper features a mashup of words that might take you by surprise, as we’ll be talking about genetically modified halos in cosmological simulations. Let’s break that down piece-by-piece (leaving genetic for last). A (dark matter) halo is a fundamental building block of the universe, forming the backbone scaffolding on which galaxies form. A cosmological simulation is a computer simulation of a modest chunk of the universe (typically cubes with ≳ 100 Mpc to a side) that is evolved over time. In these simulations, initial conditions (ICs) are generated with statistics taken from observations of the cosmic microwave background (CMB) at ...

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