Influence of Comptonization region over the ambiance of accretion disc in active galactic nucleus
Abstract
Understanding the radiative and physical structures of inner region of a few 100 pc of active galactic nucleus (AGNs) is important to constrain the causes of their activities. Although the X-ray emission from the Comptonization region/corona and the accretion disc regulates the broad-line emission regions and torus structures, the exact mutual dependency is not understood well. We performed correlation studies for X-ray, mid-infrared, and different components of Balmer emission lines for the selected sample of AGNs. Almost 10 different parameters and their interdependencies were explored in order to understand the underlying astrophysics. We found that the X-ray luminosity has a linear dependency on the various components of broad Balmer emission lines (e.g. L$$_{\text{2-10 keV}}\, \propto$$ L$$^{0.78}_{\text{H}\beta ^{\text{B}}}$$) and found a strong dependency on the optical continuum luminosity (L$$_{\text{2-10 keV}}\, \propto$$ L$$^{0.86}_{5100\, \mathring{\rm A}}$$). For a selected sample, we also observed a linear dependency between X-ray and mid-infrared luminosity (L$$_{\text{2-10 keV}}\, \propto$$ L$$^{0.74}_{6\, \mu \text{m}}$$). A break point was observed in our correlation studies for X-ray power-law index, Γ, and mass of black hole at ~ log (M/M⊙) = 8.95. Similarly, the relations between Γ and full width at half-maximum (FWHM) of H α and H β broad components show breaks at FWHMH α = 7642 ± 657 km s-1 and FWHMH β = 7336 ± 650 km s-1. However, more data are required to confine the breaks locations exactly. We noted that Γ and Eddington ratios are negatively correlated to Balmer decrements in our selected sample. We analysed and discussed about the implications of new findings in terms of interaction AGN structures.
- Authors:
- Publication Date:
- Research Org.:
- US Department of Energy (USDOE), Washington, DC (United States). Office of Science, Sloan Digital Sky Survey (SDSS)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1839449
- Alternate Identifier(s):
- OSTI ID: 1982569
- Resource Type:
- Published Article
- Journal Name:
- Monthly Notices of the Royal Astronomical Society
- Additional Journal Information:
- Journal Name: Monthly Notices of the Royal Astronomical Society Journal Volume: 510 Journal Issue: 3; Journal ID: ISSN 0035-8711
- Publisher:
- Oxford University Press
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; astronomy; astrophysics; accretion; accretion discs; galaxies; active
Citation Formats
Sriram, K., Nour, D., and Choi, C. S. Influence of Comptonization region over the ambiance of accretion disc in active galactic nucleus. United Kingdom: N. p., 2021.
Web. doi:10.1093/mnras/stab3610.
Sriram, K., Nour, D., & Choi, C. S. Influence of Comptonization region over the ambiance of accretion disc in active galactic nucleus. United Kingdom. https://doi.org/10.1093/mnras/stab3610
Sriram, K., Nour, D., and Choi, C. S. Wed .
"Influence of Comptonization region over the ambiance of accretion disc in active galactic nucleus". United Kingdom. https://doi.org/10.1093/mnras/stab3610.
@article{osti_1839449,
title = {Influence of Comptonization region over the ambiance of accretion disc in active galactic nucleus},
author = {Sriram, K. and Nour, D. and Choi, C. S.},
abstractNote = {Understanding the radiative and physical structures of inner region of a few 100 pc of active galactic nucleus (AGNs) is important to constrain the causes of their activities. Although the X-ray emission from the Comptonization region/corona and the accretion disc regulates the broad-line emission regions and torus structures, the exact mutual dependency is not understood well. We performed correlation studies for X-ray, mid-infrared, and different components of Balmer emission lines for the selected sample of AGNs. Almost 10 different parameters and their interdependencies were explored in order to understand the underlying astrophysics. We found that the X-ray luminosity has a linear dependency on the various components of broad Balmer emission lines (e.g. L$_{\text{2-10 keV}}\, \propto$ L$^{0.78}_{\text{H}\beta ^{\text{B}}}$) and found a strong dependency on the optical continuum luminosity (L$_{\text{2-10 keV}}\, \propto$ L$^{0.86}_{5100\, \mathring{\rm A}}$). For a selected sample, we also observed a linear dependency between X-ray and mid-infrared luminosity (L$_{\text{2-10 keV}}\, \propto$ L$^{0.74}_{6\, \mu \text{m}}$). A break point was observed in our correlation studies for X-ray power-law index, Γ, and mass of black hole at ~ log (M/M⊙) = 8.95. Similarly, the relations between Γ and full width at half-maximum (FWHM) of H α and H β broad components show breaks at FWHMH α = 7642 ± 657 km s-1 and FWHMH β = 7336 ± 650 km s-1. However, more data are required to confine the breaks locations exactly. We noted that Γ and Eddington ratios are negatively correlated to Balmer decrements in our selected sample. We analysed and discussed about the implications of new findings in terms of interaction AGN structures.},
doi = {10.1093/mnras/stab3610},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 3,
volume = 510,
place = {United Kingdom},
year = {Wed Dec 15 00:00:00 EST 2021},
month = {Wed Dec 15 00:00:00 EST 2021}
}
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Works referenced in this record:
Contribution of the disk emission to the broad emission lines in
AGNs: Two-component model
journal, August 2004
- Popović, L. Č.; Mediavilla, E.; Bon, E.
- Astronomy & Astrophysics, Vol. 423, Issue 3
The infrared to X-ray correlation spectra of unobscured type 1 active galactic nuclei
journal, April 2017
- García-Bernete, I.; Ramos Almeida, C.; Landt, H.
- Monthly Notices of the Royal Astronomical Society, Vol. 469, Issue 1
Revisiting the relationship between 6 μm and 2–10 keV continuum luminosities of AGN
journal, March 2015
- Mateos, S.; Carrera, F. J.; Alonso-Herrero, A.
- Monthly Notices of the Royal Astronomical Society, Vol. 449, Issue 2
The Hard X‐Ray Spectrum as a Probe for Black Hole Growth in Radio‐Quiet Active Galactic Nuclei
journal, July 2008
- Shemmer, Ohad; Brandt, W. N.; Netzer, Hagai
- The Astrophysical Journal, Vol. 682, Issue 1
Unified Schemes for Radio-Loud Active Galactic Nuclei
journal, June 1995
- Urry, C. Megan; Padovani, Paolo
- Publications of the Astronomical Society of the Pacific, Vol. 107
The Astropy Project: Building an Open-science Project and Status of the v2.0 Core Package
journal, August 2018
- Price-Whelan, A. M.; Sipőcz, B. M.; Günther, H. M.
- The Astronomical Journal, Vol. 156, Issue 3
Mean Spectral Energy Distributions and Bolometric Corrections for Luminous Quasars
journal, April 2013
- Krawczyk, Coleman M.; Richards, Gordon T.; Mehta, Sajjan S.
- The Astrophysical Journal Supplement Series, Vol. 206, Issue 1
CAIXA: a catalogue of AGN in the XMM-Newton archive : I. Spectral analysis
journal, December 2008
- Bianchi, S.; Guainazzi, M.; Matt, G.
- Astronomy & Astrophysics, Vol. 495, Issue 2
Broad-line Balmer decrements in blue active galactic nuclei
journal, December 2007
- Dong, Xiaobo; Wang, Tinggui; Wang, Jianguo
- Monthly Notices of the Royal Astronomical Society, Vol. 383, Issue 2
Maps of Dust Infrared Emission for Use in Estimation of Reddening and Cosmic Microwave Background Radiation Foregrounds
journal, June 1998
- Schlegel, David J.; Finkbeiner, Douglas P.; Davis, Marc
- The Astrophysical Journal, Vol. 500, Issue 2
The Hot Disk Corona and Magnetic Turbulence in Radio-quiet Active Galactic Nuclei: Observational Constraints
journal, April 2004
- Wang, Jian-Min; Watarai, Ken-Ya; Mineshige, Shin
- The Astrophysical Journal, Vol. 607, Issue 2
A combined optical and X-ray study of unobscured type 1 active galactic nuclei - II. Relation between X-ray emission and optical spectra: A spectral study of type 1 AGNs - II
journal, April 2012
- Jin, Chichuan; Ward, Martin; Done, Chris
- Monthly Notices of the Royal Astronomical Society, Vol. 422, Issue 4
A two-phase model for the X-ray emission from Seyfert galaxies
journal, October 1991
- Haardt, F.; Maraschi, L.
- The Astrophysical Journal, Vol. 380
The Subarcsecond Mid-Infrared view of Local Active Galactic Nuclei. iii. Polar dust Emission
journal, May 2016
- Asmus, D.; Hönig, S. F.; Gandhi, P.
- The Astrophysical Journal, Vol. 822, Issue 2
BAT AGN Spectroscopic Survey. V. X-Ray Properties of the Swift /BAT 70-month AGN Catalog
journal, December 2017
- Ricci, C.; Trakhtenbrot, B.; Koss, M. J.
- The Astrophysical Journal Supplement Series, Vol. 233, Issue 2
A Comprehensive Spectral and Variability Study of Narrow‐Line Seyfert 1 Galaxies Observed by ASCA . II. Spectral Analysis and Correlations
journal, December 1999
- Leighly, Karen M.
- The Astrophysical Journal Supplement Series, Vol. 125, Issue 2
Reddening of the BLR and NLR in AGNs from a systematic analysis of Balmer decrement
journal, November 2018
- Lu, Kai-Xing; Zhao, Yinghe; Bai, Jin-Ming
- Monthly Notices of the Royal Astronomical Society, Vol. 483, Issue 2
Atlas of quasar energy distributions
journal, November 1994
- Elvis, Martin; Wilkes, Belinda J.; McDowell, Jonathan C.
- The Astrophysical Journal Supplement Series, Vol. 95
Dissecting the active galactic nucleus in Circinus – II. A thin dusty disc and a polar outflow on parsec scales
journal, January 2019
- Stalevski, Marko; Tristram, Konrad R. W.; Asmus, Daniel
- Monthly Notices of the Royal Astronomical Society, Vol. 484, Issue 3
A search for X-ray absorbed sources in the 3XMM catalogue using photometric redshifts and Bayesian spectral fits
journal, January 2021
- Ruiz, A.; Georgantopoulos, I.; Corral, A.
- Astronomy & Astrophysics, Vol. 645
Universal spectral shape of high accretion rate AGN
journal, November 2003
- Czerny, B.; Nikołajuk, M.; Różańska, A.
- Astronomy & Astrophysics, Vol. 412, Issue 2
A combined optical and X-ray study of unobscured type 1 active galactic nuclei - III. Broad-band SED properties: A spectral study of type 1 AGNs - III
journal, August 2012
- Jin, Chichuan; Ward, Martin; Done, Chris
- Monthly Notices of the Royal Astronomical Society, Vol. 425, Issue 2
The Eleventh and Twelfth data Releases of the Sloan Digital sky Survey: Final data from Sdss-Iii
journal, July 2015
- Alam, Shadab; Albareti, Franco D.; Prieto, Carlos Allende
- The Astrophysical Journal Supplement Series, Vol. 219, Issue 1
The Largest Blueshifts of the [O iii ] Emission Line in Two Narrow‐Line Quasars
journal, January 2005
- Aoki, Kentaro; Kawaguchi, Toshihiro; Ohta, Kouji
- The Astrophysical Journal, Vol. 618, Issue 2
Radio Activity of Supermassive Black Holes with Extremely High Accretion Rates
journal, December 2020
- Yang, Xiaolong; Yao, Su; Yang, Jun
- The Astrophysical Journal, Vol. 904, Issue 2
Local supermassive black holes, relics of active galactic nuclei and the X-ray background
journal, June 2004
- Marconi, A.; Risaliti, G.; Gilli, R.
- Monthly Notices of the Royal Astronomical Society, Vol. 351, Issue 1
Unified Models for Active Galactic Nuclei and Quasars
journal, September 1993
- Antonucci, Robert
- Annual Review of Astronomy and Astrophysics, Vol. 31, Issue 1
The subarcsecond mid-infrared view of local active galactic nuclei – II. The mid-infrared–X-ray correlation
journal, September 2015
- Asmus, D.; Gandhi, P.; Hönig, S. F.
- Monthly Notices of the Royal Astronomical Society, Vol. 454, Issue 1
X-ray spectra from two-phase accretion disks
journal, August 1993
- Haardt, Francesco; Maraschi, Laura
- The Astrophysical Journal, Vol. 413
New Evidence for the Dusty Wind Model: Polar Dust and a Hot Core in the Type-1 Seyfert ESO 323-G77
journal, July 2018
- Leftley, James H.; Tristram, Konrad R. W.; Hönig, Sebastian F.
- The Astrophysical Journal, Vol. 862, Issue 1
A Large, Uniform Sample of X-Ray-emitting Active Galactic Nuclei from the ROSAT All Sky and Sloan Digital Sky Surveys: The Data Release 5 Sample
journal, December 2006
- Anderson, Scott F.; Margon, Bruce; Voges, Wolfgang
- The Astronomical Journal, Vol. 133, Issue 1
A statistical relation between the X-ray spectral index and Eddington ratio of active galactic nuclei in deep surveys
journal, June 2013
- Brightman, M.; Silverman, J. D.; Mainieri, V.
- Monthly Notices of the Royal Astronomical Society, Vol. 433, Issue 3
Resolving the mid-infrared cores of local Seyferts
journal, April 2009
- Gandhi, P.; Horst, H.; Smette, A.
- Astronomy & Astrophysics, Vol. 502, Issue 2
SPECTRAL OPTICAL MONITORING OF THE NARROW-LINE SEYFERT 1 GALAXY Ark 564
journal, August 2012
- Shapovalova, A. I.; Popović, L. Č.; Burenkov, A. N.
- The Astrophysical Journal Supplement Series, Vol. 202, Issue 1
The relation between AGN hard X-ray emission and mid-infrared continuum from ISO spectra: Scatter and unification aspects
journal, April 2004
- Lutz, D.; Maiolino, R.; Spoon, H. W. W.
- Astronomy & Astrophysics, Vol. 418, Issue 2
Hot dust Obscured Galaxies with Excess blue Light: dual agn or Single agn Under Extreme Conditions?
journal, March 2016
- Assef, R. J.; Walton, D. J.; Brightman, M.
- The Astrophysical Journal, Vol. 819, Issue 2
On the X-ray, optical emission line and black hole mass properties of local Seyfert galaxies
journal, July 2006
- Panessa, F.; Bassani, L.; Cappi, M.
- Astronomy & Astrophysics, Vol. 455, Issue 1
A Comparison of hard X-Ray Photon Indices and iron kα Emission Lines in X-Ray Luminous Narrow- and Broad-Line Seyfert 1 Galaxies
journal, March 2010
- Zhou, Xin-Lin; Zhang, Shuang-Nan
- The Astrophysical Journal, Vol. 713, Issue 1
Nuclear obscuration in active galactic nuclei
journal, September 2017
- Almeida, Cristina Ramos; Ricci, Claudio
- Nature Astronomy, Vol. 1, Issue 10
The innermost region of AGN tori: implications from the HST/NICMOS type 1 point sources and near-IR reverberation
journal, October 2007
- Kishimoto, M.; Hönig, S. F.; Beckert, T.
- Astronomy & Astrophysics, Vol. 476, Issue 2
Spectral Classification of Quasars in the Sloan Digital Sky Survey: Eigenspectra, Redshift, and Luminosity Effects
journal, December 2004
- Yip, C. W.; Connolly, A. J.; Vanden Berk, D. E.
- The Astronomical Journal, Vol. 128, Issue 6
Spectral Decomposition of Broad-Line AGNs and Host Galaxies
journal, January 2006
- Vanden Berk, Daniel E.; Shen, Jiajian; Yip, Ching-Wa
- The Astronomical Journal, Vol. 131, Issue 1
X-ray spectra of a large sample of quasars with ASCA
journal, August 2000
- Reeves, J. N.; Turner, M. J. L.
- Monthly Notices of the Royal Astronomical Society, Vol. 316, Issue 2
Spectral energy distributions of active galactic nuclei between 0.1 and 100 microns
journal, September 1986
- Edelson, R. A.; Malkan, M. A.
- The Astrophysical Journal, Vol. 308
The case for cases B and C: intrinsic hydrogen line ratios of the broad-line region of active galactic nuclei, reddenings, and accretion disc sizes
journal, January 2017
- Martin Gaskell, C.
- Monthly Notices of the Royal Astronomical Society
Redefining the Torus: A Unifying View of AGNs in the Infrared and Submillimeter
journal, October 2019
- Hönig, Sebastian F.
- The Astrophysical Journal, Vol. 884, Issue 2
The optical versus mid-infrared spectral properties of 82 Type 1 AGNs: coevolution of AGN and starburst
journal, July 2017
- Lakićević, Maša; Kovačević-Dojčinović, Jelena; Popović, Luka Č.
- Monthly Notices of the Royal Astronomical Society, Vol. 472, Issue 1
Narrow vs. broad-line Seyfert 1 galaxies: X-ray, optical, and mid-infrared AGN characteristics
journal, May 2018
- Lakićević, Maša; Popović, Luka Č; Kovačević-Dojčinović, Jelena
- Monthly Notices of the Royal Astronomical Society, Vol. 478, Issue 3
Astropy: A community Python package for astronomy
journal, September 2013
- Robitaille, Thomas P.; Tollerud, Erik J.; Greenfield, Perry
- Astronomy & Astrophysics, Vol. 558
Kinematics of the Broad Emission Line Region in NGC 5548
journal, May 1996
- Done, Christine; Krolik, Julian H.
- The Astrophysical Journal, Vol. 463
A diversity of dusty AGN tori: Data release for the VLTI/MIDI AGN Large Program and first results for 23 galaxies
journal, October 2013
- Burtscher, L.; Meisenheimer, K.; Tristram, K. R. W.
- Astronomy & Astrophysics, Vol. 558
Modelling broad emission lines in active galactic nuclei
journal, January 2019
- Czerny, Bozena
- Open Astronomy, Vol. 28, Issue 1
Correcting for the Effects of Interstellar Extinction
journal, January 1999
- Fitzpatrick, Edward L.
- Publications of the Astronomical Society of the Pacific, Vol. 111, Issue 755
CHASING HIGHLY OBSCURED QSOs IN THE COSMOS FIELD
journal, March 2009
- Fiore, F.; Puccetti, S.; Brusa, M.
- The Astrophysical Journal, Vol. 693, Issue 1
The Mid-Infrared Emission of Seyfert Galaxies: A New Analysis of ISOCAM Data
journal, November 2007
- Ramos Almeida, C.; Pérez García, A. M.; Acosta-Pulido, J. A.
- The Astronomical Journal, Vol. 134, Issue 5
Dissecting the active galactic nucleus in Circinus – I. Peculiar mid-IR morphology explained by a dusty hollow cone
journal, August 2017
- Stalevski, Marko; Asmus, Daniel; Tristram, Konrad R. W.
- Monthly Notices of the Royal Astronomical Society, Vol. 472, Issue 4
Detailed Analysis of Balmer Lines in a Sloan Digital Sky Survey Sample of 90 Broad‐Line Active Galactic Nuclei
journal, December 2007
- La Mura, G.; Popović, L. Č.; Ciroi, S.
- The Astrophysical Journal, Vol. 671, Issue 1
Reverberation Measurements of the Inner Radius of the Dust Torus in Nearby Seyfert 1 Galaxies
journal, March 2006
- Suganuma, Masahiro; Yoshii, Yuzuru; Kobayashi, Yukiyasu
- The Astrophysical Journal, Vol. 639, Issue 1
Spectral properties of the narrow-line region in Seyfert galaxies selected from the SDSS-DR7: Spectral properties of the NLR in Seyfert galaxies
journal, November 2012
- Vaona, L.; Ciroi, S.; Di Mille, F.
- Monthly Notices of the Royal Astronomical Society, Vol. 427, Issue 2
The Soft X‐Ray Properties of a Complete Sample of Optically Selected Quasars. II. Final Results
journal, March 1997
- Laor, Ari; Fiore, Fabrizio; Elvis, Martin
- The Astrophysical Journal, Vol. 477, Issue 1
The XMM-Newton view of PG quasars: I. X-ray continuum and absorption
journal, February 2005
- Piconcelli, E.; Jimenez-Bailón, E.; Guainazzi, M.
- Astronomy & Astrophysics, Vol. 432, Issue 1
A Comparison of X-Ray Photon Indices among the Narrow- and Broad-line Seyfert 1 Galaxies
journal, June 2020
- Ojha, Vineet; Chand, Hum; Dewangan, Gulab Chand
- The Astrophysical Journal, Vol. 896, Issue 2
Emission Line Properties of Active Galactic Nuclei from a Pre‐COSTAR Faint Object Spectrograph Hubble Space Telescope Spectral Atlas
journal, December 2002
- Kuraszkiewicz, Joanna K.; Green, Paul J.; Forster, Karl
- The Astrophysical Journal Supplement Series, Vol. 143, Issue 2
X-ray spectral complexity in narrow-line Seyfert 1 galaxies
journal, October 1999
- Vaughan, S.; Reeves, J.; Warwick, R.
- Monthly Notices of the Royal Astronomical Society, Vol. 309, Issue 1
Revisiting the Unified Model of Active Galactic Nuclei
journal, August 2015
- Netzer, Hagai
- Annual Review of Astronomy and Astrophysics, Vol. 53, Issue 1
The close environments of accreting massive black holes are shaped by radiative feedback
journal, September 2017
- Ricci, Claudio; Trakhtenbrot, Benny; Koss, Michael J.
- Nature, Vol. 549, Issue 7673
Accretion Rates and the Accretion Efficiency in AGNs
journal, June 2003
- Bian, Wei-Hao; Zhao, Yong-Heng
- Publications of the Astronomical Society of Japan, Vol. 55, Issue 3
A combined optical and X-ray study of unobscured type 1 active galactic nuclei - I. Optical spectra and spectral energy distribution modelling: A spectral study of unobscured type 1 AGNs - I
journal, January 2012
- Jin, Chichuan; Ward, Martin; Done, Chris
- Monthly Notices of the Royal Astronomical Society, Vol. 420, Issue 3
Distributions of Galaxy Spectral Types in the Sloan Digital Sky Survey
journal, August 2004
- Yip, C. W.; Connolly, A. J.; Szalay, A. S.
- The Astronomical Journal, Vol. 128, Issue 2
Inclination of Broad Line Region in Narrow Line and Broad Line Seyfert 1 Galaxies
journal, December 2002
- Zhang, Tian-Zhi; Wu, Xue-Bing
- Chinese Journal of Astronomy and Astrophysics, Vol. 2, Issue 6
Observational Constraints on the Dependence of Radio‐Quiet Quasar X‐Ray Emission on Black Hole Mass and Accretion Rate
journal, June 2008
- Kelly, Brandon C.; Bechtold, Jill; Trump, Jonathan R.
- The Astrophysical Journal Supplement Series, Vol. 176, Issue 2
Dusty Winds in Active Galactic Nuclei: Reconciling Observations with Models
journal, March 2017
- Hönig, Sebastian F.; Kishimoto, Makoto
- The Astrophysical Journal, Vol. 838, Issue 2
Systematic effects in measurement of black hole masses by emission-line reverberation of active galactic nuclei: Eddington ratio and inclination
journal, August 2006
- Collin, S.; Kawaguchi, T.; Peterson, B. M.
- Astronomy & Astrophysics, Vol. 456, Issue 1
Revealing the large nuclear dust structures in NGC 1068 with MIDI/VLTI
journal, May 2014
- López-Gonzaga, N.; Jaffe, W.; Burtscher, L.
- Astronomy & Astrophysics, Vol. 565
Seyfert galaxies as X-ray sources
journal, June 1978
- Elvis, Martin; Maccacaro, Tommaso; Wilson, A. S.
- Monthly Notices of the Royal Astronomical Society, Vol. 183, Issue 2
The WISSH quasars project: III. X-ray properties of hyper-luminous quasars
journal, December 2017
- Martocchia, S.; Piconcelli, E.; Zappacosta, L.
- Astronomy & Astrophysics, Vol. 608
Reverberation mapping of active galactic nuclei
journal, March 1993
- Peterson, Bradley M.
- Publications of the Astronomical Society of the Pacific, Vol. 105
Continuum energy distribution of quasars - Shapes and origins
journal, December 1989
- Sanders, D. B.; Phinney, E. S.; Neugebauer, G.
- The Astrophysical Journal, Vol. 347
The X-Ray and Mid-infrared Luminosities in Luminous Type 1 Quasars
journal, March 2017
- Chen(陳建廷), Chien-Ting J.; Hickox, Ryan C.; Goulding, Andrew D.
- The Astrophysical Journal, Vol. 837, Issue 2
The flux ratio of the [O III] 5007, 4959 lines in AGN: comparison with theoretical calculations
journal, January 2007
- Dimitrijevic, M. S.; Popovic, L. C.; Kovacevic, J.
- Monthly Notices of the Royal Astronomical Society, Vol. 374, Issue 3
Finding counterparts for all-sky X-ray surveys with Nway: a Bayesian algorithm for cross-matching multiple catalogues
journal, October 2017
- Salvato, M.; Buchner, J.; Budavári, T.
- Monthly Notices of the Royal Astronomical Society, Vol. 473, Issue 4
Active Galactic Nucleus Black Hole Masses and Bolometric Luminosities
journal, November 2002
- Woo, Jong‐Hak; Urry, C. Megan
- The Astrophysical Journal, Vol. 579, Issue 2
The Hard X-Ray Spectral Slope as an Accretion Rate Indicator in Radio-quiet Active Galactic Nuclei
journal, July 2006
- Shemmer, Ohad; Brandt, W. N.; Netzer, Hagai
- The Astrophysical Journal, Vol. 646, Issue 1
ANALYSIS OF OPTICAL Fe II EMISSION IN A SAMPLE OF ACTIVE GALACTIC NUCLEUS SPECTRA
journal, June 2010
- Kovačević, Jelena; Popović, Luka Č.; Dimitrijević, Milan S.
- The Astrophysical Journal Supplement Series, Vol. 189, Issue 1
XMM-Newton EPIC observations of 21 low-redshift PG quasars
journal, July 2004
- Porquet, D.; Reeves, J. N.; O'Brien, P.
- Astronomy & Astrophysics, Vol. 422, Issue 1
Reddening of the narrow-line regions of active galaxies and the intrinsic Balmer decrement
journal, August 1982
- Gaskell, C. M.
- Publications of the Astronomical Society of the Pacific, Vol. 94
AGN orientation through the spectroscopic correlations and model of dusty cone shell
journal, October 2021
- Lakićević, M.; Kovačević-Dojčinović, J.; Popović, L. Č
- Monthly Notices of the Royal Astronomical Society, Vol. 509, Issue 1
Dust in the narrow-line region of active galactic nuclei
journal, February 1993
- Netzer, Hagai; Laor, Ari
- The Astrophysical Journal, Vol. 404
NuSTAR AND XMM-NEWTON OBSERVATIONS OF LUMINOUS, HEAVILY OBSCURED, WISE -SELECTED QUASARS AT Z ∼ 2
journal, September 2014
- Stern, D.; Lansbury, G. B.; Assef, R. J.
- The Astrophysical Journal, Vol. 794, Issue 2
The central black hole and relationships with the host galaxy
journal, August 2008
- Peterson, Bradley M.
- New Astronomy Reviews, Vol. 52, Issue 6
Mid-infrared interferometry of 23 AGN tori: On the significance of polar-elongated emission
journal, June 2016
- López-Gonzaga, N.; Burtscher, L.; Tristram, K. R. W.
- Astronomy & Astrophysics, Vol. 591
Central Masses and Broad‐Line Region Sizes of Active Galactic Nuclei. II. A Homogeneous Analysis of a Large Reverberation‐Mapping Database
journal, October 2004
- Peterson, B. M.; Ferrarese, L.; Gilbert, K. M.
- The Astrophysical Journal, Vol. 613, Issue 2
THE FIFTH DATA RELEASE SLOAN DIGITAL SKY SURVEY/ XMM-NEWTON QUASAR SURVEY
journal, June 2009
- Young, M.; Elvis, M.; Risaliti, G.
- The Astrophysical Journal Supplement Series, Vol. 183, Issue 1