2005A&A...436...67S

Query : 2005A&A...436...67S

2005A&A...436...67S - Astronomy and Astrophysics, volume 43667-73 (2005/6-2)

Signs of warm-hot intergalactic medium in the soft X-ray background.

SOLTAN A.M., FREYBERG M.J. and HASINGER G.

Abstract (from CDS):

Small angular scale structure of the soft X-ray background correlated with the galaxy distribution is investigated. An extensive data sample from the ROSAT and XMM-Newton archives are used. Excess emission below ∼1keV extending up to at least several hundred kpc around galaxies is detected. The relative amplitude of the excess emission in the 0.3-0.5keV band amounts to 1.3±0.2% of the total background flux. A steep spectrum of the emission at higher energies is indicated by a conspicuous decline of the signal above 1keV. The XMM-Newton EPIC/MOS data covering wider energy range than the ROSAT PSPC are consistent with a thermal bremsstrahlung spectrum with kT≲0.5keV. This value is consistent with temperatures of the Warm-Hot Intergalactic Medium (WHIM) derived by several groups from hydrodynamic simulations. Correlation analysis allows for estimate of the average excess emission associated with galaxies but the data are insufficient to constrain physical parameters of the WHIM and to determine the contribution of WHIM to the total baryonic mass density.

Abstract Copyright: ∼

Journal keyword(s): X-rays: diffuse background - intergalactic medium

Simbad objects: 1

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Number of rows : 1
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 NAME Hubble Deep Field reg 12 36 49.5 +62 12 58           ~ 1967 1

Query : 2005A&A...436...67S

Basic data :
NAME Hubble Deep Field -- Region defined in the Sky
Other object types: otypes_help 		reg ()
ICRS coord. (ep=J2000) : 		12 36 49.5 +62 12 58 [ ] D ~
FK4 coord. (ep=B1950 eq=1950) : 		12 34 35.5 +62 29 28 [ ]
Gal coord. (ep=J2000) : 		125.8875 +54.8282 [ ]
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Identifiers (7) :
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NAME HDF NAME HDFN NAME Hubble Deep Field NAME Northern Hubble Deep Field
NAME HDF-N NAME NHDF NAME Hubble Deep Field North

References (1967 between 1850 and 2026) (Total 1967)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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