Detecting the relativistic galaxy bispectrum

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dc.contributor.authorMaartens, Roy
dc.contributor.authorJolicoeur, Sheean
dc.contributor.authorUmeh, Obinna
dc.date.accessioned2021-02-18T11:16:37Z
dc.date.available2021-02-18T11:16:37Z
dc.date.issued2020
dc.description.abstractThe Fourier galaxy bispectrum is complex, with the imaginary part arising from leading-order relativistic corrections, due to Doppler, gravitational redshift and related lineof-sight effects in redshift space. The detection of the imaginary part of the bispectrum is potentially a smoking gun signal of relativistic contributions. We investigate whether nextgeneration spectroscopic surveys could make such a detection. For a Stage IV spectroscopic Hα survey similar to Euclid, we find that the cumulative signal to noise of this relativistic signature is O(10). Long-mode relativistic effects couple to short-mode Newtonian effects in the galaxy bispectrum, but not in the galaxy power spectrum. This is the basis for detectability of relativistic effects in the bispectrum of a single galaxy survey, whereas the power spectrum requires multiple galaxy surveys to detect the corresponding signal.en_US
dc.identifier.citationMaartens, R. et al. (2020). Detecting the relativistic galaxy bispectrum. Journal of Cosmology and Astroparticle Physics, 2020(03)en_US
dc.identifier.uri10.1088/1475-7516/2020/03/065
dc.identifier.urihttp://hdl.handle.net/10566/5957
dc.language.isoenen_US
dc.publisherIOP Publishing Ltden_US
dc.subjectCosmological parameters from LSSen_US
dc.subjectCosmological perturbation theoryen_US
dc.subjectRedshift surveysen_US
dc.subjectGalaxy bispectrumen_US
dc.subjectRelativisticen_US
dc.titleDetecting the relativistic galaxy bispectrumen_US
dc.typeArticleen_US

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