The Optical Spectra of Narrow-Line Radio Galaxies

1977 ◽  
Vol 211 ◽  
pp. 675 ◽  
Author(s):  
Rafael Costero ◽  
Donald E. Osterbrock
Keyword(s):  
Radio Galaxies ◽  
Optical Spectra ◽  
Narrow Line

Ultraviolet Imaging Polarimetry of Narrow‐Line Radio Galaxies

1999 ◽  
Vol 514 (2) ◽  
pp. 579-586 ◽  
Author(s):  
Todd Hurt ◽  
Robert Antonucci ◽  
Ross Cohen ◽  
Anne Kinney ◽  
Julian Krolik
Keyword(s):  
Radio Galaxies ◽  
Narrow Line ◽  
Imaging Polarimetry

Ultraviolet and optical spectra of broad-line radio galaxies

2008 ◽  
pp. 83-85
Author(s):  
D. Michael Crenshaw ◽  
Bradley M. Peterson ◽  
R. Mark Wagner
Keyword(s):  
Radio Galaxies ◽  
Optical Spectra ◽  
Broad Line

Ultraviolet and optical spectra of broadline radio galaxies

1988 ◽  
Vol 96 ◽  
pp. 1208 ◽  
Author(s):  
D. Michael Crenshaw ◽  
Bradley M. Peterson ◽  
R. Mark Wagner
Keyword(s):  
Radio Galaxies ◽  
Optical Spectra

scholarly journals Metallicity of the high-redshift Universe traced by radio galaxies

2009 ◽  
Vol 5 (S265) ◽  
pp. 179-180
Author(s):  
K. Matsuoka ◽  
T. Nagao ◽  
R. Maiolino ◽  
A. Marconi ◽  
Y. Taniguchi
Keyword(s):  
Star Formation ◽  
High Redshift ◽  
Radio Galaxies ◽  
Narrow Line ◽  
Line Flux ◽  
Model Calculations ◽  
Massive Galaxies ◽  
High Redshift Universe ◽  
Photoionization Model ◽  
Very High

AbstractWe investigate the metallicity of the narrow line regions (NLRs) of high-z radio galaxies (HzRGs), using new deep optical spectra of 9 HzRGs obtained with FORS2 on VLT and data from the literature. To estimate the metallicity of NLRs we focus on the Civ/Heii and Ciii]/Civ flux ratios. Based on comparison between the observed emission-line flux ratios and the prediction of our photoionization model calculations, we find no significant metallicity evolution in NLRs of HzRGs, up to z ~ 4. We discuss the possibility that massive galaxies had almost completed the major epoch of the star formation in the very high-z universe (z > 5).

scholarly journals Tracing quasar narrow-line regions across redshift: a library of high-S/N optical spectra

2015 ◽  
Vol 448 (4) ◽  
pp. 3354-3362 ◽  
Author(s):  
A. Tammour ◽  
S. C. Gallagher ◽  
Gordon Richards
Keyword(s):  
Optical Spectra ◽  
Narrow Line

scholarly journals Emission-line profiles and kinematics of the narrow-line region in Seyfert and radio galaxies

1981 ◽  
Vol 247 ◽  
pp. 403 ◽  
Author(s):  
T. M. Heckman ◽  
H. R. Butcher ◽  
G. K. Miley ◽  
W. J. M. van Breugel
Keyword(s):  
Emission Line ◽  
Radio Galaxies ◽  
Narrow Line ◽  
Line Profiles ◽  
Line Region ◽  
Narrow Line Region

scholarly journals Unification of Radio Galaxies

1998 ◽  
Vol 164 ◽  
pp. 81-82
Author(s):  
M.H. Cohen ◽  
P.M. Ogle ◽  
H.D. Iran ◽  
R.W. Goodrich
Keyword(s):  
Radio Galaxies ◽  
Broad Line ◽  
Narrow Line ◽  
Spectral Classification ◽  
Broad Line Region ◽  
Line Region ◽  
Direct View

AbstractMany FR 2 narrow-line radio galaxies also display polarized broad lines. The broad-line region is hidden from direct view and is seen by reflection (ie scattering). In these objects the spectral classification is controlled by the aspect at which they are viewed.

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