SIMBAD references

2009ApJ...690..367A - Astrophys. J., 690, 367-388 (2009/January-1)

Galaxy clusters in the Swift/Burst Alert Telescope era: hard X-rays in the intracluster medium.

AJELLO M., REBUSCO P., CAPPELLUTI N., REIMER O., BOHRINGER H., GREINER J., GEHRELS N., TUELLER J. and MORETTI A.

Abstract (from CDS):

We report the detection of 10 clusters of galaxies in the ongoing Swift/Burst Alert Telescope (BAT) all-sky survey. This sample, which mostly comprises merging clusters, was serendipitously detected in the 15-55 keV band. We use the BAT sample to investigate the presence of excess hard X-rays above the thermal emission. The BAT clusters do not show significant (e.g., ≥2σ) nonthermal hard X-ray emission. The only exception is represented by Perseus whose high-energy emission is likely due to NGC 1275. Using XMM-Newton, Swift/XRT, Chandra and BAT data, we are able to produce upper limits of the inverse Compton (IC) emission mechanism which are in disagreement with most of the previously-claimed hard X-ray excesses. The coupling of the X-ray upper limits of the IC mechanism to radio data shows that, in some clusters, the magnetic field might be larger than 0.5 µG. We also derive the first log N-log S and luminosity function distributions of galaxy clusters above 15 keV.

Abstract Copyright:

Journal keyword(s): acceleration of particles - galaxies: clusters: general - magnetic fields - radiation mechanisms: non-thermal - X-rays: general

Nomenclature: Table 1: [ARC2009] JHHMM.m+DDMM N=10.

Simbad objects: 14

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