SIMBAD references

2010ApJ...724...12I - Astrophys. J., 724, 12-25 (2010/November-3)

Evidence of quasi-linear super-structures in the cosmic microwave background and galaxy distribution.

INOUE K.T., SAKAI N. and TOMITA K.

Abstract (from CDS):

Recent measurements of hot and cold spots on the cosmic microwave background (CMB) sky suggest the presence of super-structures on (>100 h–1 Mpc) scales. We develop a new formalism to estimate the expected amplitude of temperature fluctuations due to the integrated Sachs-Wolfe (ISW) effect from prominent quasi-linear structures. Applying the developed tools to the observed ISW signals from voids and clusters in catalogs of galaxies at redshifts z < 1, we find that they indeed imply a presence of quasi-linear super-structures with a comoving radius of 100 ∼ 300 h–1 Mpc and a density contrast|δ| ∼ O(0.1). We also find that the observed ISW signals are at odds with the concordant Λ cold dark matter model that predicts Gaussian primordial perturbations at ≳ 3σ level. We confirm that the mean temperature around the CMB cold spot in the southern Galactic hemisphere filtered by a compensating top-hat filter deviates from the mean value at ∼3σ level, implying that a quasi-linear supervoid or an underdensity region surrounded by a massive wall may reside at low redshifts z < 0.3 and the actual angular size (16°-17°) may be larger than the apparent size (4°-10°) discussed in literature. Possible solutions are briefly discussed.

Abstract Copyright:

Journal keyword(s): cosmic background radiation - large-scale structure of universe

Simbad objects: 1

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2010ApJ...724...12I and select 'bookmark this link' or equivalent in the popup menu


2019.12.11-01:02:52

© Université de Strasbourg/CNRS

    • Contact