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Abstract
We present and test a method for modifying the catalogue of dark matter haloes produced from a given cosmological simulation, so that it resembles the result of a simulation with an entirely different set of parameters. This extends the method of Angulo White, which rescales the full particle distribution from a simulation. Working directly with the halo catalogue offers an advantage in speed, and also allows modifications of the internal structure of the haloes to account for non-linear differences between cosmologies. Our method can be used directly on a halo catalogue in a self-contained manner without any additional information about the overall density field; although the large-scale displacement field is required by the method, this can be inferred from the halo catalogue alone. We show proof of concept of our method by rescaling a matter-only simulation with no baryon acoustic oscillation (BAO) features to a more standard Lambda cold dark matter model containing a cosmological constant and a BAO signal. In conjunction with the halo occupation approach, this method provides a basis for the rapid generation of mock galaxy samples spanning a wide range of cosmological parameters.
Original language | English |
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Pages (from-to) | 1233-1247 |
Number of pages | 15 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 440 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1 May 2014 |
Keywords / Materials (for Non-textual outputs)
- cosmology: theory
- large-scale structure of Universe
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Dive into the research topics of 'Remapping dark matter halo catalogues between cosmological simulations'. Together they form a unique fingerprint.Projects
- 1 Finished
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Astronomy and Astrophysics at Edinburgh
Heavens, A., Best, P., Cockell, C., Dunlop, J., Ferguson, A., Lawrence, A., McLure, R., Peacock, J., Rice, K. & Taylor, A.
1/04/12 → 31/03/16
Project: Research