A young source of optical emission from distant radio galaxies

Details A young source of optical emission from distant radio galaxies A young source of optical emission from distant radio galaxies

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993natur.362..324h&link_type=abstract

Nature (ISSN 0028-0836), vol. 362, no. 6418, p. 324-326.

Computer Science

17

Galactic Evolution, Galactic Radiation, Light Emission, Radio Galaxies, Light (Visible Radiation), Red Shift

Scientific paper

Spectroscopic observations for several distant radio galaxies are reported in which the rest-frame spectra exhibit featureless continua between 2500 and 5000 A. No evidence is seen for the break in the spectrum at 4000 A expected for an old stellar population. This suggests that young stars or scattered emissions from the active nuclei are responsible for most of the observed light. In either case, this implies that the source of the optical emission is comparable in age to the associated radio source, namely 10 exp 7 yrs or less.

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