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

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arxiv 1811.07812 v2 pith:TDJRXT6I submitted 2018-11-19 astro-ph.CO

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

A. Kov\'acs , C. S\'anchez , J. Garc\'ia-Bellido , J. Elvin-Poole , N. Hamaus , V. Miranda , S. Nadathur , T. Abbott
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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. Gazta\~naga 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
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keywords supervoidscosmicdarkenergyexcessamplitudedatadelta
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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 $A_{\rm ISW}=\Delta T^{\rm data} / \Delta T^{\rm theory}=1$, 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_{\rm ISW}\approx4.1\pm2.0$ amplitude. The combination with independent BOSS data reveals an ISW imprint of supervoids at the $3.3\sigma$ significance level with an enhanced $A_{\rm ISW}\approx5.2\pm1.6$ amplitude. The tension with $\Lambda$CDM predictions is equivalent to $2.6\sigma$ and remains unexplained.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Constraints on the gravitational potential from DESI DR2 BAO and its implications for the local void scenario

    astro-ph.CO 2026-06 unverdicted novelty 5.0

    High-redshift datasets constrain the local void gravitational redshift parameter z0 to be consistent with zero but allow the value needed for Hubble tension solution.

  2. The age of the Universe from a large sample of the oldest Galactic stars

    astro-ph.CO 2026-07 unverdicted novelty 4.0

    Stellar age analysis of a large Galactic sample gives a cosmic age of 13.73 Gyr, consistent with LambdaCDM but inconsistent with some Hubble tension resolutions implying 12.9 Gyr.