Extremely red objects in the fields of high redshift radio galaxies

Details Extremely red objects in the fields of high redshift radio galaxies Extremely red objects in the fields of high redshift radio galaxies

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993egte.conf...78p&link_type=abstract

In NASA. Ames Research Center, The Evolution of Galaxies and Their Environment p 78-79 (SEE N93-26706 10-90)

Astronomy and Astrophysics

Astronomy

5

Astronomical Photometry, Galactic Clusters, Infrared Astronomy, Radio Galaxies, Red Shift, Stellar Spectra, Energy Distribution, Infrared Imagery

Scientific paper

We are engaged in a program of infrared imaging photometry of high redshift radio galaxies. The observations are being done using NICMOS2 and NICMOS3 arrays on the DuPont 100-inch telescope at Las Campanas Observatory. In addition, Persson and Matthews are measuring the spectral energy distributions of normal cluster galaxies in the redshift range 0 to 1. These measurements are being done with a 58 x 62 InSb array on the Palomar 5-m telescope. During the course of these observations we have imaged roughly 20 square arcminutes of sky to limiting magnitudes greater than 20 in the J, H, and K passbands (3 sigma in 3 square arcseconds). We have detected several relatively bright, extremely red, extended objects during the course of this work. Because the radio galaxy program requires Thuan-Gunn gri photometry, we are able to construct rough photometric energy distributions for many of the objects. A sample of the galaxy magnitudes within 4 arcseconds diameter is given. All the detections are real; either the objects show up at several wavelengths, or in subsets of the data. The reddest object in the table, 9ab'B' was found in a field of galaxies in a rich cluster at z = 0.4; 9ab'A' lies 8 arcseconds from it.

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