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.
Instrument
PHT32
Temporal Coverage
1996-04-27T06:28:33Z/1996-07-02T10:08:25Z
Version
1.0
Mission Description
The Infrared Space Observatory (ISO) was the world's first true orbiting infrared observatory. Equipped with four highly-sophisticated and versatile scientific instruments, it was launched by Ariane in November 1995 and provided astronomers world-wide with a facility of unprecedented sensitivity and capabilities for a detailed exploration of the Universe at infrared wavelengths.
