we propose to obtain broad-band photometry with isophot for the z=2.76 radio galaxy mg1019+0535 (dey et al 1994). we strongly suspect this galaxy to be dusty because the strength of its narrow lyman-alpha emission line is far below normal compared to the strengths of the heii and ciii] emission lines. we wish to determine the mass of cool dust and the gas-to-dust ratio in this high redshift galaxy by iso photometry at 60, 90 and 160 microns (observer.s frame). this galaxy provides a unique opportunity to quantitatively examine the dust emission from a luminous galaxy where lyman-alpha is weakened by the combination of resonance line scattering and dust absorption, and to study the properties of dust in the early universe.
Instrument
PHT22
Temporal Coverage
1996-05-03T23:26:11Z/1996-05-04T01:55:59Z
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.
