SIMBAD references

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.


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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