Ionisation, shocks, and evolution of the emission line gas of z similar to 1 radio galaxies

P N Best, H J Rottgering, M S Longair

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

From deep spectroscopic observations of a sample of powerful radio galaxies with redshifts z similar to 1, it is found that both the ionisation state and the kinematics of the emission line gas evolve strongly with the size of the radio source. Radio sources with small Linear sizes (less than or similar to 150 kpc) have emission line ratios in agreement with theoretical shock ionisation models whilst those of larger sources match photoionisation predictions. The emission line gas of small sources is also more luminous and has broader Line widths and more distorted velocity profiles than that of larger radio sources. The emission line properties of small radio sources appear to be dominated by the shocks associated with the radio source.

Original languageEnglish
Title of host publicationHY-REDSHIFT UNIVERSE: GALAXY FORMATION AND EVOLUTION AT HIGH REDSHIFT
EditorsAJ Bunker, WJM VanBreugel
Place of PublicationSAN FRANCISCO
PublisherASTRONOMICAL SOC PACIFIC
Pages71-74
Number of pages4
ISBN (Print)1-58381-019-6
Publication statusPublished - 1999
EventInternational Meeting on the Hy-Redshift Universe - Galaxy Formation and Evolution at High Redshift - BERKELEY
Duration: 21 Jun 199924 Jun 1999

Conference

ConferenceInternational Meeting on the Hy-Redshift Universe - Galaxy Formation and Evolution at High Redshift
CityBERKELEY
Period21/06/9924/06/99

Keywords

  • REDSHIFT

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