The des view of the Eridanus supervoid and the CMB cold spot
Entidad
UAM. Departamento de Física TeóricaEditor
Royal Astronomical Society; Oxford University PressFecha de edición
2021-12-17Cita
10.1093/mnras/stab3309
Monthly Notices of the Royal Astronomical Society 510.1 (2022): 216-229
ISSN
0035-8711 (print); 1365-2966 (online)DOI
10.1093/mnras/stab3309Proyecto
Gobierno de España. SEV-2015-0548; Gobierno de España. AYA2017-89891-P; Gobierno de España. ESP2017-89838-C3-3-R; Gobierno de España. PGC2018-094773-B-C32; Gobierno de España. PGC2018-102021-B-I00; Gobierno de España. SEV-2016-0588; Gobierno de España. SEV-2016-0597; info:eu-repo/grantAgreement/EC/FP7/240672/EU//COGS; info:eu-repo/grantAgreement/EC/FP7/291329/EU//TESTDE; info:eu-repo/grantAgreement/EC/FP7/306478/EU//COSMICDAWNVersión del editor
https://doi.org/10.1093/mnras/stab3309Materias
Gravitational Lensing: Weak; Surveys; Cosmic Background Radiation; FísicaNota
Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, los autores pertenecientes a la UAM y el nombre del grupo de colaboración, si lo hubiereDerechos
© 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical SocietyResumen
The Cold Spot is a puzzling large-scale feature in the Cosmic Microwave Background temperature maps and its origin has been subject to active debate. As an important foreground structure at low redshift, the Eridanus supervoid was recently detected, but it was subsequently determined that, assuming the standard ΛCDM model, only about 10-20 per cent of the observed temperature depression can be accounted for via its Integrated Sachs-Wolfe imprint. However, R pdbl 100 h-1Mpc supervoids elsewhere in the sky have shown ISW imprints AISW ≈ 5.2 ± 1.6 times stronger than expected from ΛCDM (AISW = 1), which warrants further inspection. Using the Year-3 redMaGiC catalogue of luminous red galaxies from the Dark Energy Survey, here we confirm the detection of the Eridanus supervoid as a significant underdensity in the Cold Spot's direction at z < 0.2. We also show, with S/N pdbl 5 significance, that the Eridanus supervoid appears as the most prominent large-scale underdensity in the dark matter mass maps that we reconstructed from DES Year-3 gravitational lensing data. While we report no significant anomalies, an interesting aspect is that the amplitude of the lensing signal from the Eridanus supervoid at the Cold Spot centre is about 30 per cent lower than expected from similar peaks found in N-body simulations based on the standard ΛCDM model with parameters m = 0.279 and σ8 = 0.82. Overall, our results confirm the causal relation between these individually rare structures in the cosmic web and in the CMB, motivating more detailed future surveys in the Cold Spot region
Lista de ficheros
Google Scholar:Kovács, A.
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García-Bellido Capdevila, Juan
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DES Collaboration
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