001176304 001__ 1176304
001176304 003__ SzGeCERN
001176304 005__ 20170524220240.0
001176304 0247_ $$2DOI$$a10.1088/1475-7516/2009/07/035
001176304 0248_ $$aoai:cds.cern.ch:1176304$$pcerncds:CERN
001176304 037__ $$aarXiv:0905.1073
001176304 035__ $$9arXiv$$aoai:arXiv.org:0905.1073
001176304 035__ $$9SPIRES$$a8264821
001176304 035__ $$9Inspire$$a819675
001176304 041__ $$aeng
001176304 088__ $$aCERN-PH-TH-2009-079
001176304 084__ $$2CERN Library$$aTH-2009-079
001176304 100__ $$aMasina, Isabella$$uINFN, Ferrara
001176304 245__ $$aThe Cold Spot as a Large Void: Lensing Effect on CMB Two and Three Point Correlation Functions
001176304 260__ $$c2009
001176304 269__ $$c08 May 2009
001176304 500__ $$aComments: 18 pages, 12 figures
001176304 520__ $$aThe "Cold Spot" in the CMB sky could be due to the presence of an anomalous huge spherical underdense region - a "Void" - of a few hundreds Mpc/h radius. Such a structure would have an impact on the CMB two-point (power spectrum) and three-point (bispectrum) correlation functions not only at low-l, but also at high-l through Lensing, which is a unique signature of a Void. Modeling such an underdensity with an LTB metric, we show that for the power spectrum the effect should be visible already in the WMAP data if the Void radius is at least 400 Mpc/h, while it will be visible by the Planck satellite for any Void radius. We also speculate that this could be linked to the high-l detection of an hemispherical power asymmetry in the sky. Moreover, there should be non-zero correlations in the non-diagonal two-point function. For the bispectrum, the effect becomes important for squeezed triangles with two very high-l's: this signal can be detected by Planck if the Void radius is at least 600 Mpc/h. We have also estimated the contamination of the primordial non-Gaussianity f_NL due to this signal, which turns out to be negligible.
001176304 595__ $$aLANL EDS
001176304 595__ $$aCERN-TH
001176304 595__ $$aOA
001176304 65017 $$2SzGeCERN$$aAstrophysics and Astronomy
001176304 65027 $$2arXiv$$aParticle Physics - Phenomenology
001176304 693__ $$aNot applicable$$eNot applicable
001176304 690C_ $$aARTICLE
001176304 690C_ $$aCERN
001176304 695__ $$9LANL EDS$$aastro-ph.CO
001176304 695__ $$9LANL EDS$$agr-qc
001176304 695__ $$9LANL EDS$$ahep-ph
001176304 700__ $$aNotari, Alessio$$uCERN
001176304 710__ $$5PH-TH
001176304 773__ $$c035$$pJCAP$$v07$$y2009
001176304 8564_ $$uhttp://arxiv.org/pdf/0905.1073.pdf$$yPreprint
001176304 916__ $$sn$$w200918$$ya2009
001176304 960__ $$a13
001176304 961__ $$c20110119$$h1546$$lCER01$$x20090508
001176304 963__ $$aPUBLIC
001176304 970__ $$a002820029CER
001176304 980__ $$aARTICLE