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

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

2012-03-15

arxiv.org/abs/1203.3430v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Conference proceedings IAU Symposium 284 "The Spectral energy distribution of galaxies", 5-9 September 2011, Preston, UK

Scientific paper

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.

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