scholarly journals Extended Optical Emission-Line Gas in Powerful Radio Galaxies

1988 ◽  
Vol 100 ◽  
pp. 152
Author(s):  
Stefi Alison Baum
Keyword(s):  
Emission Line ◽  
Optical Emission ◽  
Radio Galaxies ◽  
Powerful Radio

scholarly journals The Emission Line Properties of the 3CR Radio Galaxies at Redshift One: Shocks, Evolution, and the Alignment Effect

1999 ◽  
Vol 194 ◽  
pp. 241-245
Author(s):  
Philip Best ◽  
Huub Röttgering ◽  
Malcolm Longair
Keyword(s):  
Emission Line ◽  
Radio Source ◽  
Velocity Structure ◽  
Radio Galaxies ◽  
Linear Size ◽  
Continuum Emission ◽  
Radio Sources ◽  
Powerful Radio ◽  
Alignment Effect ◽  
Optical Continuum

The results of a deep spectroscopic campaign on powerful radio galaxies with redshifts z ˜ 1, to investigate in detail their emission line gas properties, are presented. Both the 2-dimensional velocity structure of the [OII] 3727 emission line and the ionisation state of the gas are found to be strongly dependent upon the linear size (age) of the radio source in a manner indicative of the emission line properties of small (young) radio sources being dominated by the passage of the radio source shocks. The consequences of this evolution throughout the few x107 year lifetime of the radio source are discussed, particularly with relation to the alignment of the UV–optical continuum emission of these objects along their radio axis, the nature of which shows similar evolution.

Spectroscopy of emission-line nebulae in powerful radio galaxies - Interpretation

1992 ◽  
Vol 389 ◽  
pp. 208 ◽  
Author(s):  
S. A. Baum ◽  
T. M. Heckman ◽  
W. van Breugel
Keyword(s):  
Emission Line ◽  
Radio Galaxies ◽  
Powerful Radio

scholarly journals Overpressured emission-line clouds in the haloes of powerful radio galaxies

2002 ◽  
Vol 331 (2) ◽  
pp. L13-L18 ◽  
Author(s):  
T. G. Robinson ◽  
C. N. Tadhunter ◽  
J. E. Dyson
Keyword(s):  
Emission Line ◽  
Radio Galaxies ◽  
Powerful Radio

Extended optical line emission associated with radio galaxies

1986 ◽  
Vol 64 (4) ◽  
pp. 392-397 ◽  
Author(s):  
Wil van Breugel
Keyword(s):  
Emission Line ◽  
Ambient Medium ◽  
Line Emission ◽  
Optical Emission ◽  
Radio Galaxies ◽  
General Properties ◽  
Extragalactic Jets ◽  
Optical Line

Observations of radio galaxies that have extended optical emission-line regions provide a new way of studying the interaction of extragalactic jets with their ambient medium. Their general properties are briefly reviewed and are illustrated using recent results on 4C 29.30 and Minkowski's Object.

scholarly journals Optical–Radio Connections AGN Illumination or Jet/cloud Interactions?

1996 ◽  
Vol 175 ◽  
pp. 217-222
Author(s):  
Clive N. Tadhunter
Keyword(s):  
Emission Line ◽  
Optical Emission ◽  
Radio Galaxies ◽  
Spectral Energy ◽  
Radio Sources ◽  
Early Type ◽  
Spectral Energy Distributions ◽  
Energy Distributions ◽  
Extragalactic Radio Sources ◽  
Radio Power

Many of the most important discoveries in the study of extragalactic radio sources have resulted from investigations of the relationships between optical and radio properties. The optical/radio connections include: correlations between optical emission line luminosity and radio power; alignments between optical/UV and radio structures; and UV excesses in the spectral energy distributions of radio galaxies compared with normal early-type galaxies.

scholarly journals Radio-Optical Correlations in Distant Radio Galaxies

1989 ◽  
Vol 134 ◽  
pp. 546-547
Author(s):  
Wil van Breugel ◽  
Patrick J. McCarthy
Keyword(s):  
Emission Line ◽  
Radio Source ◽  
Optical Emission ◽  
Radio Galaxies ◽  
Optical Observations ◽  
Radio Sources ◽  
Systematic Comparison ◽  
New Radio ◽  
Optical Identifications

Optical identifications and redshifts are now available for nearly all 3CR radio galaxies (Spinrad et al. 1985; Djorgovski et al. 1988). Using new radio and optical observations, supplemented with data from the literature, we are conducting a systematic comparison of their radio and optical (emission-line and galaxy) properties, and their dependence on redshift. Here we present new results on the alignments of galaxies and their associated radio sources, and radio source asymmetries.

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