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http://hdl.handle.net/2445/127526
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DC Field | Value | Language |
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dc.contributor.author | Noreña, Jorge | - |
dc.contributor.author | Verde, Licia | - |
dc.contributor.author | Barenboim, Gabriela | - |
dc.contributor.author | Bosch, Cristian | - |
dc.date.accessioned | 2019-01-22T13:47:49Z | - |
dc.date.available | 2019-01-22T13:47:49Z | - |
dc.date.issued | 2012-08 | - |
dc.identifier.issn | 1475-7516 | - |
dc.identifier.uri | http://hdl.handle.net/2445/127526 | - |
dc.description.abstract | We consider whether the non-Gaussian scale-dependent halo bias can be used not only to constrain the local form of non-Gaussianity but also to distinguish among different shapes. In particular, we ask whether it can constrain the behavior of the primordial three-point function in the squeezed limit where one of the momenta is much smaller than the other two. This is potentially interesting since the observation of a three-point function with a squeezed limit that does not go like the local nor equilateral templates would be a signal of non-trivial dynamics during inflation. To this end we use the quasi-single field inflation model of Chen & Wang [1, 2] as a representative two-parameter model, where one parameter governs the amplitude of non-Gaussianity and the other the shape. We also perform a model-independent analysis by parametrizing the scale-dependent bias as a power-law on large scales, where the power is to be constrained from observations. We find that proposed large-scale structure surveys (with characteristics similar to the dark energy task force stage IV surveys) have the potential to distinguish among the squeezed limit behavior of different bispectrum shapes for a wide range of fiducial model parameters. Thus the halo bias can help discriminate between different models of inflation. | - |
dc.format.extent | 12 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/10.1088/1475-7516/2012/08/019 | - |
dc.relation.ispartof | Journal of Cosmology and Astroparticle Physics, 2012, vol. 2012, num. 019 | - |
dc.relation.uri | https://doi.org/10.1088/1475-7516/2012/08/019 | - |
dc.rights | (c) IOP Publishing and Sissa Medialab, 2012 | - |
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 | Prospects for constraining the shape of non-Gaussianity with the scale-dependent bias | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/acceptedVersion | - |
dc.identifier.idgrec | 619880 | - |
dc.date.updated | 2019-01-22T13:47:50Z | - |
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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619880.pdf | 412.26 kB | Adobe PDF | View/Open |
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