Information content in the halo-model dark-matter power spectrum

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dc.creatorNeyrinck, Mark C.
dc.creatorSzapudi, István
dc.creatorRimes, Christopher D.
dc.date2006-04-13
dc.date2006-05-11
dc.date.accessioned2026-07-07T07:04:39Z
dc.date.available2026-07-07T07:04:39Z
dc.descriptionUsing the halo model, we investigate the cosmological Fisher information in the non-linear dark-matter power spectrum about the initial amplitude of linear power. We find that there is little information on `translinear' scales (where the one- and two-halo terms are both significant) beyond what is on linear scales, but that additional information is present on small scales, where the one-halo term dominates. This behavior agrees with the surprising results that Rimes & Hamilton (2005, 2006) found using N-body simulations. We argue that the translinear plateau in cumulative information arises largely from fluctuations in the numbers of large haloes in a finite volume. This implies that more information could be extracted on non-linear scales if the masses of the largest haloes in a survey are known.
dc.description5 pages, 4 figures, accepted to MNRAS letters. Minor changes to match accepted version
dc.identifierhttps://arxiv.org/abs/astro-ph/0604282
dc.identifierhttp://arxiv.org/abs/astro-ph/0604282
dc.identifierMon.Not.Roy.Astron.Soc.Lett. 370 (2006) L66-L70
dc.identifierdoi:10.1111/j.1745-3933.2006.00190.x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/109393
dc.subjectAstrophysics
dc.titleInformation content in the halo-model dark-matter power spectrum
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