The following document lists the file abstract/CCOX_CLUSTFIR.abs
from catalogue VI/111.
A plain copy of the file
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IRAS emission typical of cool dust is detected from the inner 100-200 kpc in 10% of rich clusters. The far IR luminosities are 1E44-1E45 ergs/s, comparable to the entire blue luminosity of the central cD galaxy and ten times greater than the X-ray emission from the cluster core. The dust is probably heated by collisions with the hot cluster gas, which has the profound implication that far IR radiation and not X-ray emission is the primary coolant in the cores of these clusters. We propose 60- 180 um ISOPHOT mapping observations to determine the origin of the dust (whether this material was stripped from a galaxy or is due to stellar mass loss in the cD), the temperature and mass of the dust, and whether this phenomenon is very common to clusters, but at flux levels inaccessible to IRAS.