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dc.contributor.authorRavenni, Andrea; email: andrea.ravenni@manchester.ac.uk
dc.contributor.authorRizzato, Matteo; email: rizzato@strw.leidenuniv.nl
dc.contributor.authorRadinović, Slađana; email: sladana.radinovic@astro.uio.no
dc.contributor.authorLiguori, Michele; email: liguori@pd.infn.it
dc.contributor.authorLacasa, Fabien; email: fabien.lacasa@universite-paris-saclay.fr
dc.contributor.authorSellentin, Elena; email: sellentin@strw.leidenuniv.nl
dc.date.accessioned2021-06-14T13:34:02Z
dc.date.available2021-06-14T13:34:02Z
dc.date.issued2021-06-14
dc.date.submitted2020-09-02
dc.identifierhttps://chesterrep.openrepository.com/bitstream/handle/10034/624938/metadata.xml?sequence=2
dc.identifierhttps://chesterrep.openrepository.com/bitstream/handle/10034/624938/pdf.pdf?sequence=3
dc.identifier.citationJournal of Cosmology and Astroparticle Physics, volume 2021, issue 06, page 026
dc.identifier.urihttp://hdl.handle.net/10034/624938
dc.descriptionFrom IOP Publishing via Jisc Publications Router
dc.descriptionHistory: received 2020-09-02, revised 2021-03-21, accepted 2021-05-07, ppub 2021-06, epub 2021-06-14, open-access 2021-06-14
dc.descriptionPublication status: Published
dc.description.abstractAbstract: Non-Gaussian (NG) statistics of the thermal Sunyaev-Zeldovich (tSZ) effect carry significant information which is not contained in the power spectrum. Here, we perform a joint Fisher analysis of the tSZ power spectrum and bispectrum to verify how much the full bispectrum can contribute to improve parameter constraints. We go beyond similar studies of this kind in several respects: first of all, we include the complete power spectrum and bispectrum (auto- and cross-) covariance in the analysis, computing all NG contributions; furthermore we consider a multi-component foreground scenario and model the effects of component separation in the forecasts; finally, we consider an extended set of both cosmological and intra-cluster medium parameters. We show that the tSZ bispectrum is very efficient at breaking parameter degeneracies, making it able to produce even stronger cosmological constraints than the tSZ power spectrum: e.g. the standard deviation on σ8 shrinks from σPS(σ8)=0.35 to σBS(σ8)=0.065 when we consider a multi-parameter analysis. We find that this is mostly due to the different response of separate triangle types (e.g. equilateral and squeezed) to changes in model parameters. While weak, this shape dependence is clearly non-negligible for cosmological parameters, and it is even stronger, as expected, for intra-cluster medium parameters.
dc.languageen
dc.publisherIOP Publishing
dc.rightsLicence for this article: http://creativecommons.org/licenses/by/4.0/
dc.sourceeissn: 1475-7516
dc.subjectpaper
dc.subjectSunyaev-Zeldovich effect
dc.subjectcosmological parameters from LSS
dc.titleBreaking degeneracies with the Sunyaev-Zeldovich full bispectrum
dc.typearticle
dc.date.updated2021-06-14T13:34:02Z
dc.date.accepted2021-05-07


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