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http://hdl.handle.net/2445/127546
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DC Field | Value | Language |
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dc.contributor.author | Reid, Beth A. | - |
dc.contributor.author | Verde, Licia | - |
dc.contributor.author | Dolag, Klaus | - |
dc.contributor.author | Matarrese, Sabino | - |
dc.contributor.author | Moscardini, Lauro | - |
dc.date.accessioned | 2019-01-23T10:54:01Z | - |
dc.date.available | 2019-01-23T10:54:01Z | - |
dc.date.issued | 2010 | - |
dc.identifier.issn | 1475-7516 | - |
dc.identifier.uri | http://hdl.handle.net/2445/127546 | - |
dc.description.abstract | The strong dependence of the large-scale dark matter halo bias on the (local) non-Gaussianity parameter, fNL, offers a promising avenue towards constraining primordial non-Gaussianity with large-scale structure surveys. In this paper, we present the first detection of the dependence of the non-Gaussian halo bias on halo formation history using N-body simulations. We also present an analytic derivation of the expected signal based on the extended Press-Schechter formalism. In excellent agreement with our analytic prediction, we find that the halo formation history-dependent contribution to the non-Gaussian halo bias (which we call non-Gaussian halo assembly bias) can be factorized in a form approximately independent of redshift and halo mass. The correction to the non-Gaussian halo bias due to the halo formation history can be as large as 100%, with a suppression of the signal for recently formed halos and enhancement for old halos. This could in principle be a problem for realistic galaxy surveys if observational selection effects were to pick galaxies occupying only recently formed halos. Current semi-analytic galaxy formation models, for example, imply an enhancement in the expected signal of ~ 23% and ~ 48% for galaxies at z = 1 selected by stellar mass and star formation rate, respectively. | - |
dc.format.extent | 20 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | Institute of Physics (IOP) | - |
dc.relation.isformatof | Versió postprint del document publicat a: https://doi.org/10.1088/1475-7516/2010/07/013 | - |
dc.relation.ispartof | Journal of Cosmology and Astroparticle Physics, 2010, vol. 2010, num. 013 | - |
dc.relation.uri | https://doi.org/10.1088/1475-7516/2010/07/013 | - |
dc.rights | (c) IOP Publishing and Sissa Medialab, 2010 | - |
dc.source | Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) | - |
dc.subject.classification | Cosmologia | - |
dc.subject.classification | Astrofísica | - |
dc.subject.other | Cosmology | - |
dc.subject.other | Astrophysics | - |
dc.title | Non-Gaussian halo assembly bias | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/acceptedVersion | - |
dc.identifier.idgrec | 603926 | - |
dc.date.updated | 2019-01-23T10:54:01Z | - |
dc.relation.projectID | info:eu-repo/grantAgreement/EC/FP7/240117/EU//PHYS.LSS | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) Publicacions de projectes de recerca finançats per la UE |
Files in This Item:
File | Description | Size | Format | |
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603926.pdf | 436.24 kB | Adobe PDF | View/Open |
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