Global Anisotropies of ΩΛ

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dc.catalogadoryvc
dc.contributor.authorClocchiatti García, Alejandro
dc.contributor.authorRodríguez Suárez, Osmar Ali
dc.contributor.authorÓrdenes Morales, Ariel Antonio
dc.contributor.authorCuevas Tapia, Benjamín Exequiel
dc.contributor.otherInstituto Milenio de Astrofísica (MAS)
dc.date.accessioned2024-08-19T23:08:47Z
dc.date.available2024-08-19T23:08:47Z
dc.date.issued2024
dc.description.abstractAn analysis of the Cosmological Constant ΩΛ fitted to subsamples of the Pantheon+ Type Ia SN sample spanning 2π sterradians for a grid of 432 pole positions covering the whole sky reveals two large scale asymmetries. One of them is closely aligned with the Galactic North-South direction and the other points approximately towards RA∼ 217.5 ◦ Dec∼ −26.4 ◦ , ∼50.9 degrees from the CMB dipole Apex. The signal to noise ratio (S/N) of the multiple ΩΛ measurements in these directions is 3.2 ≲ S/N ≲ 8.4. The first asymmetry is puzzling, and would indicate a systematic effect related with the distribution of Pantheon+ SNe on the sky and, probably, how the correction for reddening in the Galaxy is calculated. The second one, which entails a 2.8-σ tension between ΩΛ measure in opposite directions, bears strong implications on its interpretation as Dark Energy: It is consistent with the prediction for tilted observers located in a Friedmann-Robertson-Walker universe who could measure an acceleration or a deceleration with a dipolar asymmetry, irrespective of what the universe as a whole is doing. In this case, ΩΛ would not be a physical entity, a real Dark Energy, but an apparent effect associated with the relativistic frame of reference transformation.
dc.fechaingreso.objetodigital2024-08-19
dc.format.extent13 páginas
dc.fuente.origenWOS
dc.identifier.doi10.3847/1538-4357/ad51ff
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://doi.org/10.3847/1538-4357/ad51ff
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/87524
dc.identifier.wosidWOS:001282870600001
dc.information.autorucInstituto de Física;Clocchiatti García, Alejandro; 0000-0003-3068-4258; 100500
dc.information.autorucInstituto de Física;Rodríguez Suárez, Osmar Ali; S/I; 162079
dc.information.autorucInstituto de Astrofísica;Órdenes Morales, Ariel Antonio; S/I; 1079695
dc.information.autorucInstituto de Astrofísica;Cuevas Tapia, Benjamín Exequiel; S/I; 1064507
dc.issue.numero1
dc.language.isoen
dc.nota.accesocontenido completo
dc.publisherIOP Publishing Ltd
dc.revistaAstrophysical Journal
dc.rightsacceso abierto
dc.rights.licenseCC BY Atribución Internacional 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectCosmology (343)
dc.subjectObservational Cosmology
dc.subjectCosmological Constant
dc.subjectSupernovae
dc.subject.ddc510
dc.subject.deweyMatemática física y químicaes_ES
dc.titleGlobal Anisotropies of ΩΛ
dc.typeartículo
dc.volumen971
sipa.codpersvinculados100500
sipa.codpersvinculados162079
sipa.codpersvinculados1079695
sipa.codpersvinculados1064507
sipa.trazabilidadWOS;2024-08-17
sipa.trazabilidadORCID;2024-08-19
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