2009ApJ...695.1127G

Query : 2009ApJ...695.1127G

2009ApJ...695.1127G - Astrophys. J., 695, 1127-1131 (2009/April-3)

Evidence for the missing baryons in the angular correlation of the diffuse X-ray background.

GALEAZZI M., GUPTA A. and URSINO E.

Abstract (from CDS):

The amount of detected baryons in the local universe is at least a factor of 2 smaller than that measured at high redshift. It is believed that a significant fraction of the baryons in the current universe is "hiding" in a hot filamentary structure filling the intergalactic space, the warm-hot intergalactic medium (WHIM). We found evidence of the missing baryons in the WHIM by detecting their signature on the angular correlation of diffuse X-ray emission with the XMM-Newton satellite. Our result indicates that 12%±5% of the total diffuse X-ray emission in the energy range 0.4-0.6 keV is due to intergalactic filaments. The statistical significance of our detection is several sigmas (χ2>136, N = 19). The error bar in the X-ray flux is dominated, instead, by cosmic variation and model uncertainties.

Abstract Copyright: ∼

Journal keyword(s): large-scale structure of universe - X-rays: diffuse background

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 ACO 222 ClG 01 37 31.1 -12 59 30           ~ 153 1
2 ACO 223 ClG 01 37 55.9 -12 49 11           ~ 135 1
3 NAME AXAF Ultra Deep F reg 03 32 26.70 -27 48 40.0           ~ 2 0
4 NAME Eridanus Cavity reg 04 28 36.88 -17 03 24.9           ~ 12 1
5 LDN 1642 MoC 04 35 18 -14 13.9           ~ 157 0
6 NAME Lockman Hole reg 10 45 00.0 +58 00 00           ~ 910 0
7 Z 184-50 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2841 1
8 NAME Hubble Deep Field reg 12 36 49.5 +62 12 58           ~ 1967 1
9 NAME Deep Field 1334+37 reg 13 34 31.4 +37 54 52           ~ 3 0
10 NAME Local Bubble ISM ~ ~           ~ 1059 0

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