Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 396, Issue 3, Pages 1449-1459Publisher
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2009.14892.x
Keywords
galaxies: clusters: individual: 2A 0335+096; intergalactic medium; X-rays: galaxies
Categories
Funding
- Royal Society
- National Aeronautics and Space Administration [GO7-8124X, NAS8-03060A]
- Science and Technology Facilities Council [ST/G002339/1] Funding Source: researchfish
- STFC [ST/G002339/1] Funding Source: UKRI
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We examine the core of the X-ray bright galaxy cluster 2A 0335+096 using deep Chandra X-ray imaging and spatially resolved spectroscopy, and include new radio observations. The set of around eight X-ray bright blobs in the core of the cluster, appearing like eggs in a bird's nest, contains multiphase gas from similar to 0.5 to 2 keV. The morphology of the coolest X-ray emitting gas at 0.5 keV temperature is similar to the H alpha emitting nebula known in this cluster, which surrounds the central galaxy. XMM-Newton grating spectra confirm the presence of material at these temperatures, showing reasonable agreement with Chandra emission measures. On scales of 80 to 250 kpc, there is a low temperature, high metallicity, swirl of intracluster medium as seen in other clusters. In the core, we find evidence for a further three X-ray cavities, in addition to the two previously discovered. Enhancements in 1.5 GHz radio emission are correlated with the X-ray cavities. The total 4PV enthalpy associated with the cavities is around 5 x 10(59) erg. This energy would be enough to heat the cooling region for similar to 5 x 10(7) yr. We find a maximum pressure discontinuity of 26 per cent (2 sigma) across the surface brightness edge to the south-west of the cluster core. This corresponds to an upper limit on the Mach number of the cool core with respect to its surroundings of 0.55.
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