{"paper":{"title":"The intrinsic bispectrum of the CMB from isocurvature initial conditions","arxiv_id":"2104.10204","primary_cat":"astro-ph.CO","submitted_at":"2021-04-20T18:48:39+00:00","version_compiled":"v2"},"notice":"Every quoted sentence is the authors' text from the arXiv listing abstract. Labels and probabilities are the outputs of classifier-1.13.0 on the question bank abstract-p1-20260923, exactly as returned. No sentence in this record was written by a language model.","schema":"pith.compiled-record/v0","status":"compiled","abstract":{"source":"arXiv listing abstract v2","sentences":[{"i":0,"p":1.0,"id":"s0","own":false,"role":"background","text":"Non-linear effects in the early Universe generate non-zero bispectra of the cosmic microwave background (CMB) temperature and polarization, even in the absence of primordial non-Gaussianity.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.08,"main_claim_p":0.05,"quantitative":false,"quantitative_p":0.1,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.0,"background":1.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.0}},{"i":1,"p":0.72,"id":"s1","own":true,"role":"method","text":"In this paper, we compute the contributions from isocurvature modes to the CMB bispectra using a modified version of the second-order Boltzmann solver SONG.","hedge":{"p":0.97,"label":"asserted"},"own_p":0.95,"main_claim_p":0.03,"quantitative":false,"quantitative_p":0.1,"role_probabilities":{"gap":0.0,"method":0.72,"result":0.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.28,"interpretation":0.0}},{"i":2,"p":0.97,"id":"s2","own":true,"role":"contribution","text":"We investigate the ability of current and future CMB experiments to constrain these modes with observations of the bispectrum.","hedge":{"p":0.46,"label":"asserted"},"own_p":0.7,"main_claim_p":0.03,"quantitative":false,"quantitative_p":0.04,"role_probabilities":{"gap":0.0,"method":0.02,"result":0.0,"background":0.0,"limitation":0.0,"future_work":0.01,"contribution":0.97,"interpretation":0.0}},{"i":3,"p":1.0,"id":"s3","own":true,"role":"result","text":"Our results show that the enhancement due to single isocurvature modes mixed with the adiabatic mode is negligible for the parameter ranges currently allowed by the most recent Planck results.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.86,"main_claim_p":0.24,"quantitative":false,"quantitative_p":0.47,"role_probabilities":{"gap":0.0,"method":0.0,"result":1.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.0}},{"i":4,"p":1.0,"id":"s4","own":true,"role":"result","text":"However, we find that a large compensated isocurvature mode can produce a detectable bispectrum when its correlation with the adiabatic mode is appreciable.","hedge":{"p":0.96,"label":"asserted"},"own_p":0.97,"main_claim_p":0.27,"quantitative":false,"quantitative_p":0.15,"role_probabilities":{"gap":0.0,"method":0.0,"result":1.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.0}},{"i":5,"p":0.95,"id":"s5","own":true,"role":"result","text":"The non-observation of this contribution in searches for the lensing bispectrum from Planck allows us to place a new constraint on the relative amplitude of the correlated part of the compensated isocurvature mode of $f_{\\rm CIP}=1\\pm100$.","hedge":{"p":0.99,"label":"asserted"},"own_p":0.87,"main_claim_p":0.22,"quantitative":true,"quantitative_p":0.99,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.95,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.05}},{"i":6,"p":0.54,"id":"s6","own":true,"role":"result","text":"We compute forecasts for future observations by COrE, SO, CMB-S4 and an ideal experiment and conclude that a dedicated search for the bispectrum from compensated modes could rule out a number of scenarios realised in the curvaton model.","hedge":{"p":0.79,"label":"hedged_possibility"},"own_p":0.95,"main_claim_p":0.21,"quantitative":false,"quantitative_p":0.14,"role_probabilities":{"gap":0.0,"method":0.02,"result":0.54,"background":0.0,"limitation":0.0,"future_work":0.06,"contribution":0.32,"interpretation":0.06}},{"i":7,"p":0.98,"id":"s7","own":true,"role":"result","text":"In addition, the CMB-S4 experiment could detect the most extreme of those scenarios ($f_{\\rm CIP}=16.5$) at 2 to 3-$\\sigma$ significance.","hedge":{"p":1.0,"label":"hedged_possibility"},"own_p":0.88,"main_claim_p":0.12,"quantitative":true,"quantitative_p":0.99,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.98,"background":0.0,"limitation":0.0,"future_work":0.01,"contribution":0.0,"interpretation":0.01}}]},"compiled":{"main_claim":{"p":0.45,"text":"However, we find that a large compensated isocurvature mode can produce a detectable bispectrum when its correlation with the adiabatic mode is appreciable.","location":"abstract s4","hedge_strength":{"p":0.96,"label":"asserted"}},"provenance":{"route":{"via":"TypeSafe API","model":"classifier-1.13.0","endpoint":"https://api.typesafe.ai/v1/systemone","provider":"TypeSafe"},"packing":"one request per 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