Near Infrared Observations of a Redshift Evidence for Significant Dust Absorption 5.34 Galaxy: Further

Imaging at 1.25 and 2.20pm has been obtained of the field containing the galaxy (R.D1) found at redshift z = 5.34 by Dey, et al. (1998). This galaxy has been detected at 1.25pnl, while the lower redshift (,z = 4.02) galaxy also found in the same field by Dey, et al. was detected at both 1.2 and 2.2pn1. The colors of both of these galaxies are suggestive of significant reddening of a young stellar population. Combined with photometric observations of other high redshift systems, this shows that dust is an important component of young galaxies even at redshifts in excess of 5. The extinction corrected, monochromatic luminosity of R.D1 at 1500 ~ is 1-2 magnitudes greater than a typical star forming galaxy at z w3