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The Dust Impact on the Intergalactic Medium

Published online by Cambridge University Press:  26 May 2016

L. Montier  and
M. Giard
L. Montier
Affiliation:
Centre d'Etudes Spatiales des Rayonnements, 9 avenue Colonel Roche, 31022 Toulouse, France
M. Giard
Affiliation:
Centre d'Etudes Spatiales des Rayonnements, 9 avenue Colonel Roche, 31022 Toulouse, France

Abstract

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Recent observations at low and high redshift seem to confirm the presence of dust at very low abundances in the InterGalactic Medium (IGM) and especially in the IntraCluster Medium (ICM). We have studied the impact of this dust on the IGM, in terms of heating and cooling. on one hand, with an analytical model of dust emission, we have proved that the dust can be considered as the dominant cooling agent of the ICM at large scale, when the temperature is greater than T = 107 K. on the other hand, with a strong UV Background and a low temperature (Te ≤ 105 K), dust grains become an efficient heating agent of the IGM. These two opposite effects may have played an important role regarding structure formation of the Universe at large and small scales.

Type
Part 1. Census
Information
Symposium - International Astronomical Union , Volume 217: Recycling Intergalactic and Interslettar Matter , 2004 , pp. 114 - 115
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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