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

Space Telescope Imaging Spectrograph Long‐Slit Spectroscopy of the Narrow‐Line Region of NGC 4151. II. Physical Conditions along Position Angle 221o

2000 ◽  
Vol 531 (1) ◽  
pp. 278-295 ◽  
Author(s):  
S. B. Kraemer ◽  
D. M. Crenshaw ◽  
J. B. Hutchings ◽  
T. R. Gull ◽  
M. E. Kaiser ◽  
...  
Keyword(s):  
Position Angle ◽  
Narrow Line ◽  
Space Telescope ◽  
Physical Conditions ◽  
Ngc 4151 ◽  
Line Region ◽  
Narrow Line Region ◽  
Imaging Spectrograph

The Extended Narrow Line Region of NGC 4151: Spatial Variations of the Emission Line Ratios and their Implications

1992 ◽  
pp. 434-435
Author(s):  
Balthasar Vila-Vilaró ◽  
Andrew Robinson ◽  
Stefan J. Wagner
Keyword(s):  
Emission Line ◽  
Spatial Variations ◽  
Narrow Line ◽  
Ngc 4151 ◽  
Line Region ◽  
Narrow Line Region

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.

Hubble Space Telescope Imaging of the Narrow-Line Region of NGC 4151

1993 ◽  
Vol 417 ◽  
pp. 82 ◽  
Author(s):  
I. N. Evans ◽  
Z. Tsvetanov ◽  
G. A. Kriss ◽  
H. C. Ford ◽  
S. Caganoff ◽  
...  
Keyword(s):  
Hubble Space Telescope ◽  
Narrow Line ◽  
Space Telescope ◽  
Ngc 4151 ◽  
Line Region ◽  
Narrow Line Region

scholarly journals A Study of Three-Dimensional Kinematics of the Narrow-Line Region of the Seyfert Galaxy NGC 4151 Based on Integral Field Spectroscopy

2010 ◽  
Vol 62 (2) ◽  
pp. 225-238 ◽  
Author(s):  
Atsushi Shimono ◽  
Hajime Sugai ◽  
Atsushi Kawai ◽  
Kazuya Matsubayashi ◽  
Hiroshi Ohtani ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Seyfert Galaxy ◽  
Narrow Line ◽  
Ngc 4151 ◽  
Integral Field Spectroscopy ◽  
Field Spectroscopy ◽  
Line Region ◽  
Narrow Line Region ◽  
Integral Field

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

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.

Resolved Spectroscopy of the Narrow‐Line Region in NGC 1068. III. Physical Conditions in the Emission‐Line Gas

2000 ◽  
Vol 544 (2) ◽  
pp. 763-779 ◽  
Author(s):  
Steven B. Kraemer ◽  
D. Michael Crenshaw
Keyword(s):  
Emission Line ◽  
Narrow Line ◽  
Physical Conditions ◽  
Line Region ◽  
Ngc 1068 ◽  
Narrow Line Region

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

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
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