Spectroscopy of extended emission-line gas around quasars at Z = 0.5-1

Details Spectroscopy of extended emission-line gas around quasars at Z = 0.5-1 Spectroscopy of extended emission-line gas around quasars at Z = 0.5-1

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.239..219c&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 239, July 1, 1989, p. 219-245. Research supported by SE

Astronomy and Astrophysics

Astronomy

56

Astronomical Spectroscopy, Emission Spectra, Quasars, Sky Surveys (Astronomy), Forbidden Transitions, Galactic Clusters, Galaxies, Oxygen Spectra, Radio Spectra, Red Shift

Scientific paper

Long-slit spectroscopy has been obtained for eight steep-spectrum radio quasars with redshifts of between 0.37 and 0.87. The gas pressure in the extended emission-line regions of these objects has been calculated by comparing the observed forbidden O III 5007-A/forbidden O II 3727-A intensity ratio with that expected from gas at the observed projected radius photoionized by the active nucleus. The results suggest that these radio-loud quasars lie in groups or clusters of galaxies. The hot intracluster gas is shown to confine the gas in the emission-line clouds and to cool in less than a Hubble time.

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