Subaru Spectropolarimetry of Markarian 573: The Hidden High-Ionization Nuclear Emission-Line Region inside the Dusty Torus

2004 ◽  
Vol 128 (5) ◽  
pp. 2066-2072 ◽  
Author(s):  
Tohru Nagao ◽  
Koji S. Kawabata ◽  
Takashi Murayama ◽  
Youichi Ohyama ◽  
Yoshiaki Taniguchi ◽  
...  
Keyword(s):  
Emission Line ◽  
Line Region ◽  
High Ionization ◽  
Dusty Torus

scholarly journals DETECTION OF THE INTERMEDIATE-WIDTH EMISSION LINE REGION IN QUASAR OI 287 WITH THE BROAD EMISSION LINE REGION OBSCURED BY THE DUSTY TORUS

2015 ◽  
Vol 812 (2) ◽  
pp. 99 ◽  
Author(s):  
Zhenzhen Li ◽  
Hongyan Zhou ◽  
Lei Hao ◽  
Huiyuan Wang ◽  
Tuo Ji ◽  
...  
Keyword(s):  
Emission Line ◽  
Broad Emission ◽  
Line Region ◽  
Broad Emission Line ◽  
Dusty Torus

scholarly journals High-Ionization Nuclear Emission-Line Region in the Seyfert Galaxy Tololo 0109−383

1998 ◽  
Vol 115 (2) ◽  
pp. 460-471 ◽  
Author(s):  
Takashi Murayama ◽  
Yoshiaki Taniguchi ◽  
Kazushi Iwasawa
Keyword(s):  
Emission Line ◽  
Seyfert Galaxy ◽  
Line Region ◽  
High Ionization

scholarly journals High-Ionization Nuclear Emission-Line Region of Seyfert Galaxies

2000 ◽  
Vol 119 (6) ◽  
pp. 2605-2628 ◽  
Author(s):  
Tohru Nagao ◽  
Yoshiaki Taniguchi ◽  
Takashi Murayama
Keyword(s):  
Emission Line ◽  
Seyfert Galaxies ◽  
Line Region ◽  
High Ionization

scholarly journals Extended High-Ionization Nuclear Emission-Line Region in the Seyfert Galaxy NGC 4051

2000 ◽  
Vol 119 (2) ◽  
pp. 620-630 ◽  
Author(s):  
Tohru Nagao ◽  
Takashi Murayama ◽  
Yoshiaki Taniguchi ◽  
Michitoshi Yoshida
Keyword(s):  
Emission Line ◽  
Seyfert Galaxy ◽  
Line Region ◽  
High Ionization ◽  
Ngc 4051

scholarly journals The MURALES survey

2018 ◽  
Vol 619 ◽  
pp. A83 ◽  
Author(s):  
B. Balmaverde ◽  
A. Capetti ◽  
A. Marconi ◽  
G. Venturi ◽  
M. Chiaberge ◽  
...  
Keyword(s):  
Emission Line ◽  
Point Of View ◽  
Ionized Gas ◽  
Very Large Telescope ◽  
Line Region ◽  
High Ionization ◽  
Line Widths ◽  
Bright Emission ◽  
Bright Emission Line

We observed the FR II radio galaxy 3C 459 (z = 0.22) with the MUSE spectrograph at the Very Large Telescope (VLT) as part of the MURALES project (a MUse RAdio Loud Emission line Snapshot survey). We detected diffuse nuclear emission and a filamentary ionized gas structure forming a one-sided, triangular-shaped region extending out to ∼80 kpc. The central emission line region is dominated by two compact knots of similar flux: the first (N1) cospatial with the radio core and the (N2) second located 1″.2 (5.3 kpc) to the SE. The two regions differ dramatically from the point of view of velocity (with an offset of ∼400 km s−1), line widths, and line ratios. This suggests that we are observing a dual AGN system formed by a radio loud AGN and type 2 QSO companion, which is the result of the recent merger that also produced its disturbed host morphology. The alternative possibility that N2 is just a bright emission line knot resulting from, for example, a jet-cloud interaction, is disfavored because of (1) the presence of a high ionization bicone whose apex is located at N2; (2) the observed narrow line widths; (3) its line luminosity (∼1042 erg s−1) typical of luminous QSOs; and (4) its location, which is offset from the jet path. The putative secondary AGN must be highly obscured, since we do not detect any emission in the Chandra and infrared Hubble Space Telescope images.

scholarly journals Broad Absorption Line QSOs

1986 ◽  
Vol 119 ◽  
pp. 317-330 ◽  
Author(s):  
David A. Turnshek
Keyword(s):  
Emission Line ◽  
Absorption Line ◽  
Observational Constraints ◽  
Broad Absorption ◽  
Central Source ◽  
Broad Absorption Line ◽  
Broad Emission ◽  
Line Region ◽  
High Ionization ◽  
Broad Emission Line

Observational constraints on models for broad absorption line (BAL) QSOs are discussed. The picture which emerges is one in which the broad absorption line region (BALR) contributes to the broad emission line region (ELR) as a high ionization component. Depending on QSO luminosity, the limits on the distance of the BALR from the central source are 1–1000 pc. A highly metal enriched and disk-like geometry for the region is indicated. The similarity between the absorption in some radio quiet BAL QSOs and the associated complexes of absorption in some radio loud QSOs may indicate that the BALR outflow can affect the region surrounding a QSO out to distances in excess of several hundred kpc.

scholarly journals Exploring the link between C IV outflow kinematics and sublimation-temperature dust in quasars

2020 ◽  
Author(s):  
Matthew J Temple ◽  
Manda Banerji ◽  
Paul C Hewett ◽  
Amy L Rankine ◽  
Gordon T Richards
Keyword(s):  
Emission Line ◽  
High Frequency ◽  
Infrared Emission ◽  
Black Hole Mass ◽  
Sublimation Temperature ◽  
Continuum Source ◽  
Broad Emission ◽  
Line Region ◽  
Using Data

Abstract Using data from SDSS, UKIDSS and WISE, we investigate the properties of the high-frequency cutoff to the infrared emission in ≃5000 carefully selected luminous (Lbol ∼ 1047) type 1 quasars. The strength of ≃2 μm emission, corresponding to emission from the hottest ($T>1200\rm \, K$) dust in the sublimation zone surrounding the central continuum source, is observed to correlate with the blueshift of the C iv λ1550 emission line. We therefore find that objects with stronger signatures of nuclear outflows tend to have a larger covering fraction of sublimation-temperature dust. When controlling for the observed outflow strength, the hot dust covering fraction does not vary significantly across our sample as a function of luminosity, black hole mass or Eddington fraction. The correlation between the hot dust and the C iv line blueshifts, together with the lack of correlation between the hot dust and other parameters, therefore provides evidence of a link between the properties of the broad emission line region and the infrared-emitting dusty regions in quasars.

scholarly journals The Kinematics of Quasar Broad Emission Line Regions Using a Disk-Wind Model

2017 ◽  
Vol 34 ◽  
Author(s):  
Suk Yee Yong ◽  
Rachel L. Webster ◽  
Anthea L. King ◽  
Nicholas F. Bate ◽  
Matthew J. O’Dowd ◽  
...  
Keyword(s):  
Emission Line ◽  
Line Profile ◽  
Inclination Angle ◽  
Opening Angle ◽  
Line Profiles ◽  
Wind Model ◽  
Disk Wind ◽  
Reverberation Mapping ◽  
Broad Emission ◽  
Line Region

AbstractThe structure and kinematics of the broad line region in quasars are still unknown. One popular model is the disk-wind model that offers a geometric unification of a quasar based on the viewing angle. We construct a simple kinematical disk-wind model with a narrow outflowing wind angle. The model is combined with radiative transfer in the Sobolev, or high velocity, limit. We examine how angle of viewing affects the observed characteristics of the emission line. The line profiles were found to exhibit distinct properties depending on the orientation, wind opening angle, and region of the wind where the emission arises.At low inclination angle (close to face-on), we find that the shape of the emission line is asymmetric, narrow, and significantly blueshifted. As the inclination angle increases (close to edge-on), the line profile becomes more symmetric, broader, and less blueshifted. Additionally, lines that arise close to the base of the disk wind, near the accretion disk, tend to be broad and symmetric. Single-peaked line profiles are recovered for the intermediate and equatorial wind. The model is also able to reproduce a faster response in either the red or blue sides of the line profile, consistent with reverberation mapping studies.

scholarly journals Near infrared hydrogen emission line ratios as diagnostics of the broad emission line region

2012 ◽  
Vol 372 ◽  
pp. 012069
Author(s):  
Andrea J Ruff ◽  
David J E Floyd ◽  
Kirk T Korista ◽  
Rachel L Webster ◽  
Ryan L Porter ◽  
...  
Keyword(s):  
Emission Line ◽  
Near Infrared ◽  
Hydrogen Emission ◽  
Broad Emission ◽  
Line Region ◽  
Broad Emission Line ◽  
Hydrogen Emission Line
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