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

Rawlings, Steve, Lacy, Mark and Eales, Stephen Anthony ORCID: https://orcid.org/0000-0002-7394-426X 1991. 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. Monthly Notices of the Royal Astronomical Society 251 , pp. 17-21.

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Abstract

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.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Publisher:	Oxford University Press
ISSN:	0035-8711
Related URLs:	http://adsabs.harvard.edu/abs/1991MNRAS....
Last Modified:	24 Oct 2022 11:46
URI:	https://orca.cardiff.ac.uk/id/eprint/49273

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