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Prospects for constraining the shape of non-Gaussianity with the scale-dependent bias

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Prospects for constraining the shape of non-Gaussianity with the scale-dependent bias

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dc.contributor.author	Noreña, Jorge
dc.contributor.author	Verde, Licia
dc.contributor.author	Barenboim Szuchman, Gabriela Alejandra
dc.contributor.author	Bosch Serrano, Cristian
dc.date.accessioned	2015-04-28T07:07:14Z
dc.date.available	2015-04-28T07:07:14Z
dc.date.issued	2012
dc.identifier.citation	Noreña, Jorge Verde, Licia Barenboim Szuchman, Gabriela Alejandra Bosch Serrano, Cristian 2012 Prospects for constraining the shape of non-Gaussianity with the scale-dependent bias Journal Of Cosmology And Astroparticle Physics 2012 8 019-1 019-15
dc.identifier.uri	http://hdl.handle.net/10550/43439
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 and Wang 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.language.iso	eng
dc.relation.ispartof	Journal Of Cosmology And Astroparticle Physics, 2012, vol. 2012, num. 8, p. 019-1-019-15
dc.subject	Física
dc.subject	Astrofísica
dc.title	Prospects for constraining the shape of non-Gaussianity with the scale-dependent bias
dc.type	journal article	es_ES
dc.date.updated	2015-04-28T07:07:15Z
dc.identifier.doi	10.1088/1475-7516/2012/08/019
dc.identifier.idgrec	083660
dc.rights.accessRights	open access	es_ES