Normal Gas-Rich Galaxies in the Far-Infrared: The Legacy of ISOPHOT
arXiv:astro-ph/0502179 · doi:10.1063/1.1913949
Abstract
Following on from IRAS, the ISOPHOT instrument on board the Infrared Space Observatory (ISO) has provided a huge advancement in our knowledge of the phenomenology of the far-infrared (FIR) emission of normal galaxies and the underlying physical processes. Highlights include: the discovery of an extended cold dust emission component, present in all types of gas-rich galaxies and carrying the bulk of the dust luminosity; the definitive characterisation of the spectral energy distribution in the FIR, revealing the channels through which stars power the FIR light; the derivation of realistic geometries for stars and dust from ISOPHOT imaging and the discovery of cold dust associated with HI extending beyond the optical body of galaxies.
Invited review presented at "The Spectral Energy Distribution of Gas-Rich Galaxies: Confronting Models with Data", Heidelberg, 4-8 Oct. 2004 (to be published in AIP Conf. Ser.); for a version with full resolution figures go to http://edoc.mpg.de/207563.0
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