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Title: X-ray and Sunyaev-Zel'Dovich properties of the warm-hot intergalactic medium

Abstract

We use numerical simulations to predict the soft X-ray ([0.4-0.6] keV) and Sunyaev-Zel'dovich (SZ) signal (at 150 GHz) from a large-scale structure in the universe and then compute two-point statistics to study the spatial distribution and time evolution of the signals. The average X-ray signal predicted for the warm-hot intergalactic medium (WHIM) is in good agreement with observational constraints that set it at about 10% of the total diffuse X-ray background. The characteristic angle computed with the autocorrelation function is of the order of some arcminutes and becomes smaller at higher redshift. The power spectrum peak of the SZ due to the WHIM is at l ∼ 10,000 and has an amplitude of ∼0.2 μK{sup 2}, about one order of magnitude below the signal measured with telescopes like Planck, Atacama Cosmology Telescope, and South Pole Telescope. Even if the high-redshift WHIM signal is too weak to be detected using X-rays only, the small-scale correlation between X-ray and SZ maps is dominated by the high-redshift WHIM. This makes the analysis of the SZ signal in support of X-rays a promising tool to study the early time WHIM.

Authors:
;  [1]
  1. Physics Department, University of Miami, Coral Gables, FL 33155 (United States)
Publication Date:
OSTI Identifier:
22356491
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 789; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; AMPLITUDES; BACKGROUND RADIATION; COMPUTERIZED SIMULATION; CORRELATIONS; COSMOLOGY; GHZ RANGE; KEV RANGE; RED SHIFT; SOFT X RADIATION; SPATIAL DISTRIBUTION; SPECTRA; TELESCOPES; UNIVERSE

Citation Formats

Ursino, E., Galeazzi, M., and Huffenberger, K., E-mail: galeazzi@physics.miami.edu. X-ray and Sunyaev-Zel'Dovich properties of the warm-hot intergalactic medium. United States: N. p., 2014. Web. doi:10.1088/0004-637X/789/1/55.
Ursino, E., Galeazzi, M., & Huffenberger, K., E-mail: galeazzi@physics.miami.edu. X-ray and Sunyaev-Zel'Dovich properties of the warm-hot intergalactic medium. United States. https://doi.org/10.1088/0004-637X/789/1/55
Ursino, E., Galeazzi, M., and Huffenberger, K., E-mail: galeazzi@physics.miami.edu. 2014. "X-ray and Sunyaev-Zel'Dovich properties of the warm-hot intergalactic medium". United States. https://doi.org/10.1088/0004-637X/789/1/55.
@article{osti_22356491,
title = {X-ray and Sunyaev-Zel'Dovich properties of the warm-hot intergalactic medium},
author = {Ursino, E. and Galeazzi, M. and Huffenberger, K., E-mail: galeazzi@physics.miami.edu},
abstractNote = {We use numerical simulations to predict the soft X-ray ([0.4-0.6] keV) and Sunyaev-Zel'dovich (SZ) signal (at 150 GHz) from a large-scale structure in the universe and then compute two-point statistics to study the spatial distribution and time evolution of the signals. The average X-ray signal predicted for the warm-hot intergalactic medium (WHIM) is in good agreement with observational constraints that set it at about 10% of the total diffuse X-ray background. The characteristic angle computed with the autocorrelation function is of the order of some arcminutes and becomes smaller at higher redshift. The power spectrum peak of the SZ due to the WHIM is at l ∼ 10,000 and has an amplitude of ∼0.2 μK{sup 2}, about one order of magnitude below the signal measured with telescopes like Planck, Atacama Cosmology Telescope, and South Pole Telescope. Even if the high-redshift WHIM signal is too weak to be detected using X-rays only, the small-scale correlation between X-ray and SZ maps is dominated by the high-redshift WHIM. This makes the analysis of the SZ signal in support of X-rays a promising tool to study the early time WHIM.},
doi = {10.1088/0004-637X/789/1/55},
url = {https://www.osti.gov/biblio/22356491}, journal = {Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 789,
place = {United States},
year = {Tue Jul 01 00:00:00 EDT 2014},
month = {Tue Jul 01 00:00:00 EDT 2014}
}