期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 11, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2019/11/041
关键词
cosmological simulations; galaxy clustering; cluster counts; power spectrum
资金
- National Science Foundation [NSF PHY-1125915]
- Starting Grant GrInaGal from the European Research Council [ERC-2015-STG 678652]
We present a new simulation technique in which any chosen mode k of the density contrast field can be amplified by an amplitude Delta. These amplified-mode simulations allow us to study the response of the halo density field to a long-wavelength mode other than the DC mode. In this sense they are a generalization of the separate-universe simulations to finite-wavelength modes. In particular, we use these simulations to obtain robust measurements of the first higher-derivative bias of dark matter halos b(del 2 delta). We find a negative bias at all mass considered, roughly following the -R-L(2) (M) relation, the Lagrangian radius of halos squared, as naively expected. We compare our results with those obtained from a fit to the 1-loop halo-matter power spectrum, as well as with the recent results from Abidi and Baldauf (2018), and to the prediction from the peak theory.
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