The Jubilee ISW Project I: simulated ISW and weak lensing maps and initial power spectra results

W. A. Watson, J. M. Diego, S. Gottlöber, I. T. Iliev, A. Knebe, E. Martínez-González, G. Yepes, R. B. Barreiro, J. González-Nuevo, Shaun Hotchkiss, A. Marcos-Caballero, S. Nadathur, P. Vielva

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Abstract

We present initial results from the Jubilee Integrated Sachs-Wolfe (ISW) project, which models the expected Λ cold dark matter ISW effect in the Jubilee simulation. The simulation volume is (6 h−1 Gpc)3, allowing power on very large scales to be incorporated into the calculation. Haloes are resolved down to a mass of 1.5 × 1012h−1 M, which allows us to derive a catalogue of mock Luminous Red Galaxies (LRGs) for cross-correlation analysis with the ISW signal. We find the ISW effect observed on a projected sky to grow stronger at late times with the evolution of the ISW power spectrum matching expectations from linear theory. Maps of the gravitational-lensing effect are calculated using the same potential as for the ISW. We calculate the redshift dependence of the ISW–LRG cross-correlation signal for a full-sky survey with no noise considerations. For ℓ < 30, the signal is strongest for lower redshift bins (z ∼ 0.2–0.5), whereas for ℓ > 30, the signal is best observed with surveys covering z ∼ 0.6–1.0.
Original languageEnglish
Pages (from-to)412-425
Number of pages14
JournalMonthly Notices of the Royal Astronomical Society
Volume483
Issue number1
Early online date12 Dec 2013
DOIs
Publication statusPublished - 11 Feb 2014

Keywords

  • methods: numerical
  • cosmic background radiation
  • dark energy
  • large-scale structure of Universe
  • UKRI
  • STFC
  • ST/F002858/1
  • ST/I000976/1

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