Rey, MP;
Pontzen, A;
(2018)
Quadratic genetic modifications: a streamlined route to cosmological simulations with controlled merger history.
Monthly Notices of the Royal Astronomical Society
, 474
(1)
pp. 45-54.
10.1093/mnras/stx2744.
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Abstract
Recent work has studied the interplay between a galaxy's history and its observable properties using ‘genetically modified’ cosmological zoom simulations. The approach systematically generates alternative histories for a halo, while keeping its cosmological environment fixed. Applications to date altered linear properties of the initial conditions, such as the mean overdensity of specified regions; we extend the formulation to include quadratic features, such as local variance, that determines the overall importance of smooth accretion relative to mergers in a galaxy's history. We introduce an efficient algorithm for this new class of modification and demonstrate its ability to control the variance of a region in a one-dimensional toy model. Outcomes of this work are twofold: (i) a clarification of the formulation of genetic modifications and (ii) a proof of concept for quadratic modifications leading the way to a forthcoming implementation in cosmological simulations.
| Type: | Article |
|---|---|
| Title: | Quadratic genetic modifications: a streamlined route to cosmological simulations with controlled merger history |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stx2744 |
| Publisher version: | https://doi.org/10.1093/mnras/stx2744 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | methods: numerical, galaxies: evolution, galaxies: formation, dark matter |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10033934 |
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