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http://hdl.handle.net/2445/127527
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DC Field | Value | Language |
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dc.contributor.author | Wagner, Christian | - |
dc.contributor.author | Verde, Licia | - |
dc.contributor.author | Boubekeur, Lotf | - |
dc.date.accessioned | 2019-01-22T13:52:12Z | - |
dc.date.available | 2019-01-22T13:52:12Z | - |
dc.date.issued | 2010 | - |
dc.identifier.issn | 1475-7516 | - |
dc.identifier.uri | http://hdl.handle.net/2445/127527 | - |
dc.description.abstract | We address the issue of setting up generic non-Gaussian initial conditions for N-body simulations. We consider inflationary-motivated primordial non-Gaussianity where the perturbations in the Bardeen potential are given by a dominant Gaussian part plus a non-Gaussian part specified by its bispectrum. The approach we explore here is suitable for any bispectrum, i.e. it does not have to be of the so-called separable or factorizable form. The procedure of generating a non-Gaussian field with a given bispectrum (and a given power spectrum for the Gaussian component) is not univocal, and care must be taken so that higher-order corrections do not leave a too large signature on the power spectrum. This is so far a limiting factor of our approach. We then run N-body simulations for the most popular inflationary-motivated non-Gaussian shapes. The halo mass function and the non-linear power spectrum agree with theoretical analytical approximations proposed in the literature, even if they were so far developed and tested only for a particular shape (the local one). We plan to make the simulations outputs available to the community via the non-Gaussian simulations comparison project web site http://icc.ub.edu/~liciaverde/NGSCP.html. | - |
dc.format.extent | 23 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/10.1088/1475-7516/2010/10/022 | - |
dc.relation.ispartof | Journal of Cosmology and Astroparticle Physics, 2010, vol. 2010, num. 022 | - |
dc.relation.uri | https://doi.org/10.1088/1475-7516/2010/10/022 | - |
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 | N-body simulations with generic non-Gaussian initial conditions I: Power Spectrum and halo mass function | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/acceptedVersion | - |
dc.identifier.idgrec | 603932 | - |
dc.date.updated | 2019-01-22T13:52:12Z | - |
dc.relation.projectID | info:eu-repo/grantAgreement/EC/FP7/240117/EU//PHYS.LSS | - |
dc.relation.projectID | info:eu-repo/grantAgreement/EC/FP7/202182/EU//ACT | - |
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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603932.pdf | 610.81 kB | Adobe PDF | View/Open |
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