期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 452, 期 4, 页码 4203-4221出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stv1484
关键词
cosmology: theory; dark energy; large-scale structure of Universe
资金
- STFC studentship
- European Research Council under the EC FP7 grant [240185]
- STFC Consolidated Grant for Astronomy and Astrophysics at the University of Edinburgh
- BIS National E-infrastructure capital grant [ST/K00042X/1]
- DiRAC Operations grant [ST/K003267/1]
- Durham University
- STFC [ST/J001422/1, ST/I00162X/1, ST/M007006/1, ST/L00075X/1, ST/K00042X/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/L00075X/1, ST/I00162X/1, ST/M007006/1, ST/K00042X/1] Funding Source: researchfish
We develop and test an algorithm to rescale a simulated dark-matter particle distribution or halo catalogue from a standard gravity model to that of a modified gravity model. This method is based on that of Angulo & White but with some additional ingredients to account for (i) scale-dependent growth of linear density perturbations and (ii) screening mechanisms that are generic features of viable modified gravity models. We attempt to keep the method as general as possible, so that it may plausibly be applied to a wide range of modified theories, although tests against simulations are restricted to a subclass of f (R) models at this stage. We show that rescaling allows the power spectrum of matter to be reproduced at the similar to 3 per cent level in both real and redshift space up to k = 0.1h Mpc-1 if we change the box size and alter the particle displacement field; this limit can be extended to k = 1h Mpc(-1) if we additionally alter halo internal structure. We simultaneously develop an algorithm that can be applied directly to a halo catalogue, in which case the halo mass function and clustering can be reproduced at the similar to 5 per cent level. Finally, we investigate the clustering of halo particle distributions, generated from rescaled halo catalogues, and find that a similar accuracy can be reached.
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