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 language | English (US) |
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Pages (from-to) | 5267-5277 |
Number of pages | 11 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 484 |
Issue number | 4 |
DOIs | |
State | Published - Apr 21 2019 |
Keywords
- cosmic background radiation
- large-scale structure of Universe
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science