The following document lists the file abstract/EHU_RED_GAL.abs
from catalogue VI/111.
A plain copy of the file
(without headers/trailers) may be downloaded.
We propose to obtain ISOCAM and ISOPHOT observations of the two reddest galaxies [(I-K) 6.5] which are currently known. Hu and Ridgway, who discovered these objects in the field of the z=3.790 quasar PC 1643+4631A, suggested, on the basis of their colors, that these were early type galaxies at z=2 to 3. However, more recently, Frayer et al. have reported a detection of CO emission at the redshift 3.137 of a damped Ly alpha system lying towards the quasar and suggested that the ultrared objects may be reddened active or starbursting galaxies associated with this emission. This interpretation would imply that these sources should be strong 100-200 micron sources and easily detectable with ISO. Multiwavelength observations with ISO should determine the nature of these very unusual objects.