Other
Scientific paper
Oct 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...333..161l&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 333, Oct. 1, 1988, p. 161-167.
Other
184
Extragalactic Radio Sources, Radio Galaxies, Red Shift, Forbidden Transitions, Hubble Constant, Lyman Alpha Radiation, Spectral Energy Distribution, Star Formation Rate, Ultraviolet Radiation
Scientific paper
The identification of a 1 Jansky radio source with a faint radio galaxy at a redshift of z = 3.395 is reported. This galaxy has strong Ly-alpha emission that is similar in luminosity and in other properties to that recently seen in 3C galaxies at z about 1.8. The rest-frame ultraviolet continuum in this galaxy is flat between 1200 A and 2000 A, indicating a substantial star-formation rate of order 100 solar mass/yr. However, the continuum rises steeply into the rest-frame visual band as sampled by the observed infrared waveband. This implies a dominant older population of age at least 1-2 Gyr that accounts for over 90 percent of the mass of the system. This galaxy is therefore not believed to be a 'protogalaxy', a phase which it may have gone through at an earlier epoch.
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