scholarly journals On the Effects of Dissipative Turbulence on the Narrow Emission‐Line Ratios in Seyfert Galaxies

2007 ◽  
Vol 668 (2) ◽  
pp. 730-737 ◽  
Author(s):  
S. B. Kraemer ◽  
M. C. Bottorff ◽  
D. M. Crenshaw
Keyword(s):  
Emission Line ◽  
Seyfert Galaxies ◽  
Dissipative Turbulence ◽  
Narrow Emission

The Effect of Intrinsic Ultraviolet Absorbers on the Ionizing Continuum and Narrow Emission Line Ratios in Seyfert Galaxies

1999 ◽  
Vol 519 (1) ◽  
pp. 69-79 ◽  
Author(s):  
S. B. Kraemer ◽  
T. J. Turner ◽  
D. M. Crenshaw ◽  
I. M. George
Keyword(s):  
Emission Line ◽  
Seyfert Galaxies ◽  
Ultraviolet Absorbers ◽  
Narrow Emission

scholarly journals Impact of nuclear activity on extended emission line regions of nearby galaxies

1995 ◽  
Vol 149 ◽  
pp. 269-273
Author(s):  
E. Pécontal ◽  
P. Ferruit ◽  
A.S. Wilson
Keyword(s):  
Emission Line ◽  
Seyfert Galaxies ◽  
Emission Lines ◽  
Nuclear Activity ◽  
Central Engine ◽  
Nearby Galaxies ◽  
The Impact ◽  
Integral Field ◽  
Extended Emission ◽  
Narrow Emission

AbstractWe used the integral field TIGER to map the intensity ratios of emission lines and the velocity field over the narrow emission line of a few nearby Seyfert galaxies. Our aim is to study the impact of nuclear activity on galaxies, which will hopefully help us to probe the central engine. We present here some results for two objects: M 51 and NGC 5929.

scholarly journals Substructures in the Narrow-Line Region of AGN

1989 ◽  
Vol 134 ◽  
pp. 312-313
Author(s):  
Sylvain Veilleux
Keyword(s):  
High Resolution ◽  
Emission Line ◽  
Seyfert Galaxies ◽  
Narrow Line ◽  
Line Profiles ◽  
Preliminary Results ◽  
Line Region ◽  
Narrow Line Region ◽  
Narrow Emission ◽  
Resolution Study

The preliminary results of a high-resolution study of narrow emission-line profiles in bright Seyfert galaxies are reported. Profile substructures such as secondary peaks and shoulders are observed in nearly all the objects. The results of profile comparisons in Mrk 359, Mrk 533, and Mrk 1066 are briefly discussed.

scholarly journals The Excitation Mechanism of Emission‐Line Regions in Seyfert Galaxies

1999 ◽  
Vol 521 (2) ◽  
pp. 531-546 ◽  
Author(s):  
Ian Evans ◽  
Anuradha Koratkar ◽  
Mark Allen ◽  
Michael Dopita ◽  
Zlatan Tsvetanov
Keyword(s):  
Emission Line ◽  
Seyfert Galaxies ◽  
Excitation Mechanism

Current-tunable lasers with a narrow emission line operating at 3.3 µm

2001 ◽  
Vol 35 (3) ◽  
pp. 360-364 ◽  
Author(s):  
A. N. Imenkov ◽  
N. M. Kolchanova ◽  
P. Kubat ◽  
K. D. Moiseev ◽  
C. Civiš ◽  
...  
Keyword(s):  
Emission Line ◽  
Tunable Lasers ◽  
Narrow Emission

scholarly journals Identification of AGN in the XMM-Newton X-ray survey of the SMC

2019 ◽  
Vol 622 ◽  
pp. A29 ◽  
Author(s):  
Chandreyee Maitra ◽  
Frank Haberl ◽  
Valentin D. Ivanov ◽  
Maria-Rosa L. Cioni ◽  
Jacco Th. van Loon
Keyword(s):  
Near Infrared ◽  
Spectral Characteristics ◽  
Selection Criterion ◽  
Galactic Nuclei ◽  
Seyfert Galaxies ◽  
Mid Infrared ◽  
X Ray ◽  
Stellar Density ◽  
Narrow Emission

Context. Finding active galactic nuclei (AGN) behind the Magellanic Clouds (MCs) is difficult because of the high stellar density in these fields. Although the first AGN behind the Small Magellanic Cloud (SMC) were reported in the 1980s, it is only recently that the number of AGN known behind the SMC has increased by several orders of magnitude. Aims. The mid-infrared colour selection technique has proven to be an efficient means of identifying AGN, especially obscured sources. The X-ray regime is complementary in this regard and we use XMM-Newton observations to support the identification of AGN behind the SMC. Methods. We present a catalogue of AGN behind the SMC by correlating an updated X-ray point-source catalogue from our XMM-Newton survey of the SMC with previously identified AGN from the literature as well as a list of candidates obtained from the ALLWISE mid-infrared colour-selection criterion. We studied the properties of the sample with respect to their redshifts, luminosities, and X-ray spectral characteristics. We also identified the near-infrared counterpart of the sources from the VISTA observations. Results. The redshift and luminosity distributions of the sample (where known) indicate that we detect sources ranging from nearby Seyfert galaxies to distant and obscured quasars. The X-ray hardness ratios are compatible with those typically expected for AGN, and the VISTA colours and variability are also consistent with AGN. A positive correlation was observed between the integrated X-ray flux (0.2–12 keV) and the ALLWISE and VISTA magnitudes. We further present a sample of new candidate AGN and candidates for obscured AGN. Together these make an interesting subset for further follow-up studies. An initial spectroscopic follow-up of 6 out of the 81 new candidates showed that all six sources are active galaxies, although two have narrow emission lines.

scholarly journals Double-peaked narrow emission-line galaxies in LAMOST survey

2018 ◽  
Vol 482 (2) ◽  
pp. 1889-1899 ◽  
Author(s):  
M-X Wang ◽  
A-L Luo ◽  
Y-H Song ◽  
S-Y Shen ◽  
S Feng ◽  
...  
Keyword(s):  
Emission Line ◽  
Emission Line Galaxies ◽  
Narrow Emission
Sign in / Sign up

Export Citation Format

Share Document