The Ionization Structure of the Narrow‐Line Region of NGC 1068 and Its Relationship to the Extended Radio Emission

1997 ◽  
Vol 487 (2) ◽  
pp. 560-567 ◽  
Author(s):  
A. Capetti ◽  
D. J. Axon ◽  
F. D. Macchetto
Keyword(s):  
Radio Emission ◽  
Narrow Line ◽  
Ionization Structure ◽  
Line Region ◽  
Extended Radio ◽  
Ngc 1068 ◽  
Narrow Line Region

Subarcsecond Mid-Infrared Imaging of Warm Dust in the Narrow-Line Region of NGC 1068

1993 ◽  
Vol 419 ◽  
pp. 136 ◽  
Author(s):  
Murray Cameron ◽  
John W. V. Storey ◽  
Valentin Rotaciuc ◽  
Reinhard Genzel ◽  
Laurent Verstraete ◽  
...  
Keyword(s):  
Infrared Imaging ◽  
Narrow Line ◽  
Mid Infrared ◽  
Line Region ◽  
Ngc 1068 ◽  
Narrow Line Region

scholarly journals Jet-Driven Motions in the Narrow-Line Region of NGC 1068

1998 ◽  
Vol 496 (2) ◽  
pp. L75-L78 ◽  
Author(s):  
D. J. Axon ◽  
A. Marconi ◽  
A. Capetti ◽  
F. D. Macchetto ◽  
E. Schreier ◽  
...  
Keyword(s):  
Narrow Line ◽  
Line Region ◽  
Ngc 1068 ◽  
Narrow Line Region

scholarly journals Probing the Ionization Structure of the Narrow‐Line Region in the Seyfert 1 Galaxy NGC 4151

2008 ◽  
Vol 679 (2) ◽  
pp. 1128-1143 ◽  
Author(s):  
S. B. Kraemer ◽  
H. R. Schmitt ◽  
D. M. Crenshaw
Keyword(s):  
Narrow Line ◽  
Ngc 4151 ◽  
Ionization Structure ◽  
Line Region ◽  
Narrow Line Region

scholarly journals Resolved Spectroscopy of the Narrow-Line Region in NGC 1068: Kinematics of the Ionized Gas

2000 ◽  
Vol 532 (2) ◽  
pp. L101-L104 ◽  
Author(s):  
D. Michael Crenshaw ◽  
Steven B. Kraemer
Keyword(s):  
Narrow Line ◽  
Ionized Gas ◽  
Line Region ◽  
Ngc 1068 ◽  
Narrow Line Region

HST/FOC imaging of the narrow-line region of NGC 1068

1994 ◽  
Vol 435 ◽  
pp. L15 ◽  
Author(s):  
F. Macchetto ◽  
A. Capetti ◽  
W. B. Sparks ◽  
D. J. Axon ◽  
A. Boksenberg
Keyword(s):  
Narrow Line ◽  
Line Region ◽  
Ngc 1068 ◽  
Narrow Line Region

scholarly journals Gravitation and Jet Induced Velocities in the Narrow Line Region of Active Galaxies

1989 ◽  
Vol 8 ◽  
pp. 423-427 ◽  
Author(s):  
Mark Whittle
Keyword(s):  
Active Galaxies ◽  
Basic Question ◽  
Radio Sources ◽  
Narrow Line ◽  
Radio Luminosity ◽  
Natural Explanation ◽  
Radio Jets ◽  
Line Region ◽  
Ngc 1068 ◽  
Narrow Line Region

The basic question I want to address is : “What mechanism or mechanisms accelerate the gas in the narrow line region of active galaxies, yielding the observed profile shapes.” At the present time there is no generally accepted answer to this question. Part of the problem dates back to the first few Seyferts that were discovered which, in retrospect, seem to have had anomalously broad lines. For example NGC 1068, MKN 3, and MKN 78 have [OIII] λ 5007 FWHM ~ 1000 km s-1, which is clearly greater than anything associated with a normal galaxy velocity fields. An obvious implication was that these high velocities were in some way related to the activity. This view was reinforced by the discovery of a correlation between [OIII] FWHM and non-thermal radio luminosity (Wilson and Willis 1981). When many radio sources were found to have linear double or triple morphology (e.g. Ulvestad and Wilson 1984a,b), a natural explanation seemed to be outflowing radio jets which stir up the narrow line region and thus generate the correlation between line width and radio luminosity.

scholarly journals MERLIN Observations of Seyfert Nuclei

1994 ◽  
Vol 159 ◽  
pp. 430-430
Author(s):  
A. Pedlar ◽  
M.J. Kukula
Keyword(s):  
Radio Emission ◽  
Adaptive Optics ◽  
Narrow Line ◽  
High Quality ◽  
Optical Images ◽  
Line Region ◽  
Narrow Line Region

Radio emission from Seyfert nuclei appears to be intimately related to narrow line region (NLR) of ionised gas. Both regions have an extent of a few hundred parsecs corresponding to typically a few arcsec, and are only marginally resolved by ground based observations. HST and adaptive optics are giving optical images of the ionised gas with angular resolutions of order 0.1″. It is essential that high quality radio images are available with similar resolution so that models relating the two regions can be tested. The extended MERLIN is ideally suited for this task. It has angular resolutions of 0.05″ at 5GHz and 0.13″ at 1.5GHz and sensitivities of a few 10s of μJy. In this contribution we shall summarise the results on two objects.

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