Near-infrared spectrophotometry of eight 3CR radiogalaxies - The first detections of O III 500.7 and S III 953.2 forbidden emission lines in galaxies with Z greater than 1

Details Near-infrared spectrophotometry of eight 3CR radiogalaxies - The first detections of O III 500.7 and S III 953.2 forbidden emission lines in galaxies with Z greater than 1 Near-infrared spectrophotometry of eight 3CR radiogalaxies - The first detections of O III 500.7 and S III 953.2 forbidden emission lines in galaxies with Z greater than 1

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.251p..17r&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 251, July 1, 1991, p. 17P-21P. Research supported by NA

Astronomy and Astrophysics

Astronomy

16

Emission Spectra, Infrared Spectroscopy, Near Infrared Radiation, Radio Galaxies, Astronomical Spectroscopy, Galactic Structure, Red Shift

Scientific paper

The results are presented of near-IR spectrophotometry of eight 3CR radiogalaxies with redshifts in the range of 0.256 to 1.575. The narrow O III 500.7 forbidden emission line was detected in 3C13 (z = 1.351), and the narrow S III 953.2 forbidden emission line in 3C79 (z = 0.256), in the northern near-IR knot to 3C356 (z = 1.079), and marginally in 3C368 (z = 1.132). These emission lines are among the faintest to be detected with near-IR spectroscopy, and include the first measurements of forbidden O III 500.7 and S III 953.2 in any galaxy with z greater than 1. It is shown that narrow-line emission can sometimes account for a substantial fraction (about 25 percent) of the broad-band near IR flux arising from the substructures of high-z radiogalaxies, but that this fraction is strongly dependent on, and therefore a valuable probe of, physical conditions within the substructures.

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