Evidence against a supervoid causing the CMB Cold Spot

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dc.contributor.authorMackenzie, Ruari
dc.contributor.authorShanks, Tom
dc.contributor.authorBremer, Malcolm N.
dc.contributor.authorCai, Yan Chuan
dc.contributor.authorGunawardhana, Madusha L. P.
dc.contributor.authorKovacs, Andras
dc.contributor.authorNorberg, Peder
dc.contributor.authorSzapudi, Istvan
dc.date.accessioned2024-01-10T12:38:48Z
dc.date.available2024-01-10T12:38:48Z
dc.date.issued2017
dc.description.abstractWe report the results of the 2dF-VST ATLAS Cold Spot galaxy redshift survey (2CSz) based on imaging from VST ATLAS and spectroscopy from 2dF AAOmega over the core of the CMB Cold Spot. We sparsely surveyed the inner 5 degrees. radius of the Cold Spot to a limit of i(AB) = 19.2, sampling similar to 7000 galaxies at z < 0.4. We have found voids at z = 0.14, 0.26 and 0.30 but they are interspersed with small overdensities, and the scale of these voids is insufficient to explain the Cold Spot through the Lambda CDM ISW effect. Combining with previous data out to z similar to 1, we conclude that the CMB Cold Spot could not have been imprinted by a void confined to the inner core of the Cold Spot. Additionally, we find that our 'control' field GAMA G23 shows a similarity in its galaxy redshift distribution to the Cold Spot. Since the GAMA G23 line of sight shows no evidence of a CMB temperature decrement, we conclude that the Cold Spot may have a primordial origin rather than being due to line-of-sight effects.
dc.description.funderSTFC (UK)
dc.description.funderARC (Australia)
dc.description.funderAAO
dc.description.funderRoyal Society
dc.description.funderEuropean Research Council
dc.description.funderScience and Technology Facilities Council
dc.description.funderCONICYT-Chile grant
dc.description.funderESO Telescopes at the La Silla Paranal Observatory
dc.description.funderScience and Technology Facilities Council
dc.fechaingreso.objetodigital2024-04-29
dc.format.extent11 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/stx931
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/stx931
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/77102
dc.identifier.wosidWOS:000406839900078
dc.information.autorucFísica;Gunawardhana M;S/I;1038201
dc.issue.numero2
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final2338
dc.pagina.inicio2328
dc.publisherOXFORD UNIV PRESS
dc.revistaMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
dc.rightsacceso restringido
dc.subjectgalaxies: distances and redshifts
dc.subjectcosmic background radiation
dc.subjectlarge-scale structure of Universe
dc.subjectGALAXY REDSHIFT SURVEY
dc.subjectVLT DEEP SURVEY
dc.subjectLOCAL HOLE
dc.subjectMICROWAVE
dc.subjectIMPRINT
dc.subjectVOIDS
dc.subjectSUPERSTRUCTURES
dc.subjectCOUNTS
dc.subjectGAMA
dc.subjectSPECTRA
dc.titleEvidence against a supervoid causing the CMB Cold Spot
dc.typeartículo
dc.volumen470
sipa.codpersvinculados1038201
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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