scholarly journals Cospatial Line Emission and Accelerated Outflow in the Spatially Resolved Narrow-Line Region of NGC 4151: Confirming Model Predictions

1997 ◽  
Vol 159 ◽  
pp. 359-360
Author(s):  
D. Moore ◽  
R.D. Cohen ◽  
M.M. De Robertis
Keyword(s):  
Emission Line ◽  
Spectral Resolution ◽  
Line Emission ◽  
Narrow Line ◽  
Line Flux ◽  
Ngc 4151 ◽  
Spatially Resolved ◽  
Line Region ◽  
Model Predictions ◽  
Narrow Line Region

AbstractWe present results of high S/N, high spatial and spectral resolution (0″.65 and 0.8Å FWHM, respectively) spectrophotometry of the NLR of NGC 4151 using the Keck 10-m Telescope. The observations are the first in a series that test unambiguously several specific predictions that are based on earlier modeling of spatially unresolved emissionline spectra. Importantly, we partially resolve the source of most of the emission-line flux. Thus, the observations suitably complement analyses of spatially unresolved NLR spectra.

High-Velocity Line Emission in the Narrow-Line Region of NGC 4151

1999 ◽  
Vol 118 (5) ◽  
pp. 2101-2107 ◽  
Author(s):  
J. B. Hutchings ◽  
D. M. Crenshaw ◽  
A. C. Danks ◽  
T. R. Gull ◽  
S. B. Kraemer ◽  
...  
Keyword(s):  
High Velocity ◽  
Line Emission ◽  
Narrow Line ◽  
Ngc 4151 ◽  
Line Region ◽  
Narrow Line Region

Space Telescope Imaging Spectrograph Long‐Slit Spectroscopy of the Narrow‐Line Region of NGC 4151. I. Kinematics and Emission‐Line Ratios

2000 ◽  
Vol 531 (1) ◽  
pp. 257-277 ◽  
Author(s):  
C. H. Nelson ◽  
D. Weistrop ◽  
J. B. Hutchings ◽  
D. M. Crenshaw ◽  
T. R. Gull ◽  
...  
Keyword(s):  
Emission Line ◽  
Narrow Line ◽  
Space Telescope ◽  
Ngc 4151 ◽  
Line Region ◽  
Narrow Line Region ◽  
Imaging Spectrograph

scholarly journals Photoionization, line emission diagnostics

2013 ◽  
Vol 9 (S304) ◽  
pp. 18-18
Author(s):  
Lisa Kewley
Keyword(s):  
Emission Line ◽  
Radiation Field ◽  
Line Emission ◽  
Narrow Line ◽  
Ionization State ◽  
Integral Field Spectroscopy ◽  
Field Spectroscopy ◽  
Line Region ◽  
Narrow Line Region ◽  
Integral Field

AbstractPhotoionization models for AGN, including Seyfert and LINERs are discussed. These photoionization models can be used to derive emission-line diagnostics for AGN that can determine the properties of the AGN and surrounding ISM, including the relative AGN contribution to the EUV radiation field, the hardness of the AGN radiation field, the ionization state of the gas, and the metallicity of the narrow-line region. It is shown how the AGN emission-line diagnostics are expected to change with redshift. Finally, latest application of these models by the author to wide integral field spectroscopy to separate starburst and AGN contributions in composite galaxies are presented.

scholarly journals A Separation of Systematic and Turbulent Motions in the Narrow-Line Region of NGC 4151

1989 ◽  
Vol 134 ◽  
pp. 352-354
Author(s):  
Hartmut Schulz ◽  
Berto Boer
Keyword(s):  
Radio Source ◽  
Galactic Disk ◽  
Narrow Line ◽  
Line Profiles ◽  
X Ray ◽  
Ngc 4151 ◽  
Spatially Resolved ◽  
Line Region ◽  
Bulk Motion ◽  
Narrow Line Region

Line profiles from the spatially resolved narrow-line region of NGC 4151 are separated into several bulk-motion components which show velocity dispersions two to three times larger than starburst nuclei with similar luminosity. The components are suggested to arise within the galactic disk and by filaments entrained in or situated along the shells of two super-bubbles. The large cone-like SW bubble is able to account for the SW soft-X ray excess and the hole in the NLR disk through which a UV-radiation cone emerges. The bubbles appear to be related to the nuclear radio source.

scholarly journals Size and properties of the narrow-line region in Seyfert-2 galaxies from spatially-resolved optical spectroscopy

2006 ◽  
Vol 456 (3) ◽  
pp. 953-966 ◽  
Author(s):  
N. Bennert ◽  
B. Jungwiert ◽  
S. Komossa ◽  
M. Haas ◽  
R. Chini
Keyword(s):  
Optical Spectroscopy ◽  
Narrow Line ◽  
Spatially Resolved ◽  
Line Region ◽  
Narrow Line Region

scholarly journals Emission-Line Asymmetries and the Kinematics of the Narrow-Line Region in AGNs

1989 ◽  
Vol 134 ◽  
pp. 347-348
Author(s):  
Richard A. Shaw ◽  
Michael M. De Robertis
Keyword(s):  
Emission Line ◽  
Fundamental Problem ◽  
Signal To Noise Ratio ◽  
Critical Density ◽  
High Signal ◽  
Symmetric Model ◽  
Narrow Line ◽  
Line Region ◽  
Wide Range ◽  
Narrow Line Region

We have obtained high signal-to-noise ratio CCD spectra at ≤ 150 km/s resolution for 6 high-ionization Seyfert galaxies. We analyzed the profiles of the emission-lines over a wide range in both ionization potential (IP) and critical density (Ncr) in order to study the fundamental problem of cloud motion in the narrow-line region (NLR). Using the known correlations between FWHM and IP and/or Ncr for these galaxies, and assuming that the blueward profile asymmetries result from the combined effects of radially infalling or outflowing clouds and extinction within or between them, we deconvolve these effects by analyzing the correlation between emission-line asymmetries and both IP and Ncr. We find fair to good correlations in the sense that lines with high IP and Ncr also tend to have high asymmetry, while lines with low IP and Ncr have low but usually non-zero asymmetry. Simulated emission-line profiles generated with a spherically-symmetric model of a NLR suggest that the extinction arises primarily within radially infalling clouds.

Subaru High-Dispersion Spectroscopy of the Narrow-Line Region in the Seyfert Galaxy NGC 4151

2003 ◽  
Vol 126 (3) ◽  
pp. 1167-1182 ◽  
Author(s):  
Tohru Nagao ◽  
Takashi Murayama ◽  
Yasuhiro Shioya ◽  
Yoshiaki Taniguchi
Keyword(s):  
Seyfert Galaxy ◽  
High Dispersion ◽  
Narrow Line ◽  
Ngc 4151 ◽  
Line Region ◽  
Narrow Line Region
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