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1 results

  • The dust emission SED of X-ray emitting regions in Stephan's Quintet

  • G. Natale, R. J. Tuffs, C. K. Xu, C. C. Popescu, J. Fischera, U. Lisenfeld, N. Lu, P. Appleton, M. Dopita, P.-A. Duc, Y. Gao, W. Reach, J. Sulentic, M. Yun
  • Journal:
    Proceedings of the International Astronomical Union / Volume 7 / Issue S284 / September 2011
    Published online by Cambridge University Press:
    17 August 2012, pp. 337-341
    Print publication:
    September 2011
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  • We analysed the Spitzer maps of Stephan's Quintet in order to investigate the nature of the dust emission associated with the X-ray emitting regions of the large scale intergalactic shock and of the group halo. This emission can in principle be powered by dust-gas particle collisions, thus providing efficient cooling of the hot gas. However the results of our analysis suggest that the dust emission from those regions is mostly powered by photons. Nonetheless dust collisional heating could be important in determining the cooling of the IGM gas and the large scale star formation morphology observed in SQ.