we wish to study the early stages of galaxy formation using sample of 17 radio galaxies located in the redshift range z = 1.5 to 3.8. the sample has been derived in a manner which is unbiased relative to the dust properties. here we propose continuum measurements in the far-infrared using 4 filters (70, 90, 105 and 160 microns). the spectral energy distributions resulting from these iso observations will be supplemented with ground based observations near 1 mm. the wide-band (radio-mm-fir-optical) spectra will then be modelled in radiative transfer calculations, in order to derive the likely source configuration and to constrain energy source in these highly luminous galaxies. the proposed spectral measurements would yield, in a straight-forward manner, the ir luminosity, dust mass, dust temperature and, under reasonable assumptions, also the star-formation rate and gas mass. their dependence on redshift would provide important clues about the time evolution of elliptical galaxies in the early universe. the radio galaxies comprising this sample either lie at z > 3, or in narrow windows of redshift, centred at z = 1.5, 2.0, 2.5 and 3.0 (total 17 objects).
Instrument
PHT22
Temporal Coverage
1996-03-19T06:25:07Z/1998-02-21T16:57:08Z
Version
1.0
Mission Description
The Infrared Space Observatory (ISO) was the worlds 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.
European Space Agency, E. Kruegel, 1999, 'DUST EMISSION FROM RADIO GALAXIES AT HIGH REDSHIFTS', 1.0, European Space Agency, https://doi.org/10.5270/esa-0rkkf87
