Infrared spectroscopy of 11 radio galaxies at Z equals 2-4 - Evidence that some high-redshift radio galaxies may be protogalaxies

Eales, Stephen Anthony ORCID: https://orcid.org/0000-0002-7394-426X and Rawlings, Steve 1993. Infrared spectroscopy of 11 radio galaxies at Z equals 2-4 - Evidence that some high-redshift radio galaxies may be protogalaxies. Astrophysical Journal 411 (1) , pp. 67-88. 10.1086/172808

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Abstract

Infrared spectroscopy of 11 radio galaxies at z equals 2-4 was obtained using a new array spectrometer on UKIRT, and choosing the galaxies on the basis of their being in an accessible part of the sky during the two observing runs and for the availability of adequate astrometry. Emission lines were detected from all of the objects, principally the forbidden O III 495.9 A/500.7 A doublet from the five galaxies at z greater than 2.9, and the H-alpha, forbidden N II 654.8 A/658.3 A complex from the galaxies at z less than 2.9. It was found that some of these galaxies may be in a protogalactic phase.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Uncontrolled Keywords:	galactic evolution; h alpha line; h beta line; infrared spectroscopy' lyman alpha radiation; radio galaxies; red shift; active galactic nuclei; emission spectra; interstellar extinction; luminosity
Publisher:	IOP Science
ISSN:	0004-637X
Last Modified:	24 Oct 2022 11:16
URI:	https://orca.cardiff.ac.uk/id/eprint/47531

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