2009A&A...508.1161N


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.03CET11:07:35

2009A&A...508.1161N - Astronomy and Astrophysics, volume 508, 1161-1171 (2009/12-4)

XMM-Newton and INTEGRAL analysis of the Ophiuchus cluster of galaxies.

NEVALAINEN J., ECKERT D., KAASTRA J., BONAMENTE M. and KETTULA K.

Abstract (from CDS):

We investigated the non-thermal hard X-ray emission in the Ophiuchus cluster of galaxies. Our aim is to characterise the physical properties of the non-thermal component and its interaction with the cosmic microwave background. We performed spatially resolved spectroscopy and imaging using XMM-Newton data to model the thermal emission. Combining this with INTEGRAL ISGRI data, we modelled the 0.6-140keV band total emission in the central 7 arcmin region. The models that best describe both PN and ISGRI data contain a power-law component with a photon index in a range 2.2-2.5. This component produces ∼10% of the total flux in the 1-10keV band. The pressure of the non-thermal electrons is ∼1% of that of the thermal electrons. Our results support the scenario whereby a relativistic electron population, which produces the recently detected radio mini-halo in Ophiuchus, also produces the hard X-rays via inverse compton scattering of the CMB photons. The best-fit models imply a differential momentum spectrum of the relativistic electrons with a slope of 3.4-4.0 and a magnetic field strength B=0.05-0.15µG. The lack of evidence for a recent major merger in the Ophiuchus centre allows the possibility that the relativistic electrons are produced by turbulence or hadronic collisions.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: individual: Ophiuchus - X-rays: galaxies: clusters - techniques: spectroscopic

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 - 2021
#notes
1 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 2002 1
2 V* V818 Sco LXB 16 19 55.0688745859 -15 38 25.019920749 11.60 12.40 11.1     Oev 1542 0
3 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3137 1
4 NAME LHB X 16 42.0 +02 19           ~ 273 0
5 HD 153919 HXB 17 03 56.7728262865 -37 50 38.912077679 6.06 6.78 6.51 6.08 5.90 O6Iafcp 765 1
6 NAME Oph Cluster ClG 17 12 24.7 -23 21 01           ~ 246 0
7 2MASX J17122774-2322108 BiC 17 12 27.744 -23 22 10.82           ~ 15 0
8 GAL 000.0+00.0 gam 17 45 39.60213 -29 00 22.0000           ~ 12003 0
9 2XMM J180112.4-254436 LXB 18 01 12.40 -25 44 36.1           ~ 366 1
10 NAME Galactic Bulge reg ~ ~           ~ 3532 0

    Equat.    Gal    SGal    Ecl

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2021.03.03-11:07:35

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