More out of less: An excess integrated Sachs-Wolfe signal from supervoids mapped out by the Dark Energy Survey

  • A. Kovács
  • , C. Sánchez
  • , J. García-Bellido
  • , J. Elvin-Poole
  • , N. Hamaus
  • , V. Miranda
  • , S. Nadathur
  • , T. Abbott
  • , F. B. Abdalla
  • , J. Annis
  • , S. Avila
  • , E. Bertin
  • , D. Brooks
  • , D. L. Burke
  • , A. Carnero Rosell
  • , M. Carrasco Kind
  • , J. Carretero
  • , R. Cawthon
  • , M. Crocce
  • , C. Cunha
  • L. N. Da Costa, C. Davis, J. De Vicente, D. Depoy, S. Desai, H. T. Diehl, P. Doel, E. Fernandez, B. Flaugher, P. Fosalba, J. Frieman, E. Gaztañaga, D. Gerdes, R. Gruendl, G. Gutierrez, W. Hartley, D. L. Hollowood, K. Honscheid, B. Hoyle, D. J. James, E. Krause, K. Kuehn, N. Kuropatkin, O. Lahav, M. Lima, M. Maia, M. March, J. Marshall, P. Melchior, F. Menanteau, C. J. Miller, R. Miquel, J. Mohr, A. A. Plazas, K. Romer, E. Rykoff, E. Sanchez, V. Scarpine, R. Schindler, M. Schubnell, I. Sevilla-Noarbe, M. Smith, R. C. Smith, M. Soares-Santos, F. Sobreira, E. Suchyta, M. Swanson, G. Tarle, D. Thomas, V. Vikram, J. Weller

Research output: Contribution to journalArticlepeer-review

57 Scopus citations

Abstract

The largest structures in the cosmic web probe the dynamical nature of dark energy through their integrated Sachs-Wolfe imprints. In the strength of the signal, typical cosmic voids have shown good consistency with expectation A ISW = T data /T theory = 1, given the substantial cosmic variance. Discordantly, large-scale hills in the gravitational potential, or supervoids, have shown excess signals. In this study, we mapped out 87 new supervoids in the total 5000 deg 2 footprint of the Dark Energy Survey at 0.2 < z < 0.9 to probe these anomalous claims. We found an excess imprinted profile with A ISW ‰ 4.1 ± 2.0 amplitude. The combination with independent BOSS data reveals an ISW imprint of supervoids at the 3.3σ significance level with an enhanced A ISW 5.2 ± 1.6 amplitude. The tension with CDM predictions is equivalent to 2.6σ and remains unexplained.

Original languageEnglish (US)
Pages (from-to)5267-5277
Number of pages11
JournalMonthly Notices of the Royal Astronomical Society
Volume484
Issue number4
DOIs
StatePublished - Apr 21 2019

Keywords

  • cosmic background radiation
  • large-scale structure of Universe

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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