A3112: Deep High-Resolution Spectroscopy of a Cool Core Cluster

Details A3112: Deep High-Resolution Spectroscopy of a Cool Core Cluster A3112: Deep High-Resolution Spectroscopy of a Cool Core Cluster

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.0405s&link_type=abstract

American Astronomical Society, HEAD meeting #11, #4.05; Bulletin of the American Astronomical Society, Vol. 41, p.656

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X-ray and other observations imply some mechanism acting on hundreds of kpc scales feeds energy into cluster gas and inhibits large cooling gas infalls onto central cD galaxies. Although many X-ray observations have been performed at CCD resolution, only a handful have taken advantage of the unique capabilities of the RGS to do high-resolution spectroscopy, due to the long observing times required and the small number of suitable clusters. We present high signal to noise (180 ksec) XMM-Newton RGS observations of the cool core cluster A3112, whose compact properties make it an ideal target for studying heating models with the RGS. The centroids and shapes of the strong lines from O and the Fe L-shell limit the turbulence and thus pressure support available in the cluster, while the lack of any Fe XVII line in the data puts a tight constraint on any low (< 1 keV) temperature gas in the cluster core.

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