The Low-luminosity End of the Radius-Luminosity Relationship for Active Galactic Nuclei
Misty C. Bentz,Kelly D. Denney,Catherine J. Grier,Aaron J. Barth,Bradley M. Peterson,Marianne Vestergaard,Marianne Vestergaard,Vardha N. Bennert,Gabriela Canalizo,Gisella De Rosa,Alexei V. Filippenko,Elinor L. Gates,Jenny E. Greene,Weidong Li,Matthew A. Malkan,Richard W. Pogge,Daniel Stern,Tommaso Treu,Jong-Hak Woo +18 more
TLDR
In this article, the authors present an updated and revised analysis of the relationship between the H{beta} broadline region (BLR) radius and the luminosity of the active galactic nucleus (AGN).Abstract:
We present an updated and revised analysis of the relationship between the H{beta} broad-line region (BLR) radius and the luminosity of the active galactic nucleus (AGN). Specifically, we have carried out two-dimensional surface brightness decompositions of the host galaxies of nine new AGNs imaged with the Hubble Space Telescope Wide Field Camera 3. The surface brightness decompositions allow us to create ''AGN-free'' images of the galaxies, from which we measure the starlight contribution to the optical luminosity measured through the ground-based spectroscopic aperture. We also incorporate 20 new reverberation-mapping measurements of the H{beta} time lag, which is assumed to yield the average H{beta} BLR radius. The final sample includes 41 AGNs covering four orders of magnitude in luminosity. The additions and updates incorporated here primarily affect the low-luminosity end of the R{sub BLR}-L relationship. The best fit to the relationship using a Bayesian analysis finds a slope of {alpha}= 0.533{sup +0.035}{sub -0.033}, consistent with previous work and with simple photoionization arguments. Only two AGNs appear to be outliers from the relationship, but both of them have monitoring light curves that raise doubt regarding the accuracy of their reported time lags. The scatter around the relationship is found to be 0.19more » {+-} 0.02 dex, but would be decreased to 0.13 dex by the removal of these two suspect measurements. A large fraction of the remaining scatter in the relationship is likely due to the inaccurate distances to the AGN host galaxies. Our results help support the possibility that the R{sub BLR}-L relationship could potentially be used to turn the BLRs of AGNs into standardizable candles. This would allow the cosmological expansion of the universe to be probed by a separate population of objects, and over a larger range of redshifts.« lessread more
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Chasing obscuration in type-I AGN: discovery of an eclipsing clumpy wind at the outer broad-line region of NGC 3783
Missagh Mehdipour,Jelle Kaastra,Jelle Kaastra,Gerard A. Kriss,Nahum Arav,Ehud Behar,Simone Bianchi,Graziella Branduardi-Raymont,Massimo Cappi,Elisa Costantini,Jacobo Ebrero,L. Di Gesu,Shai Kaspi,Junjie Mao,Junjie Mao,B. De Marco,Giorgio Matt,Stéphane Paltani,U. Peretz,B. M. Peterson,B. M. Peterson,P.-O. Petrucci,P.-O. Petrucci,Ciro Pinto,Gabriele Ponti,Francesco Ursini,C. P. de Vries,Dominic J. Walton +27 more
TL;DR: In this paper, the authors carried out a Swift monitoring program to track the X-ray hardness variability of eight type-I AGN over a year and found that the obscuration produces broad and blue-shifted UV absorption lines of Ly$\alpha, C IV, and N V, together with a new high-ionisation component producing Fe XXV and Fe XXVI absorption lines.
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Identification of SDSSJ141324.27+530527.0 as A New "Changing-Look" Quasar with a "Turn-on" Transition
J. Z. Wang,Datao Xu,Jian-Yan Wei +2 more
TL;DR: In this article, the authors reported an identification of SDSSJ141324+530527.0 (SBS1411+533) at $z=0.456344$ as a new "changing-look" quasar with a turn-on spectral type transition from Type-1.9/2 to Type-2 within a rest frame time scale of 1-10 yr by a comparison of our new spectroscopic observation and the Sloan Digital Sky Survey (SDSS) archive data base.
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C iv black hole mass measurements with the Australian Dark Energy Survey (OzDES)
J. K. Hoormann,P. Martini,Tamara M. Davis,Andrew J. King,C. Lidman,D. Mudd,Rob Sharp,N. E. Sommer,Brad E. Tucker,Zhefu Yu,S. Allam,Jacobo Asorey,Santiago Avila,M. Banerji,David Brooks,E. Buckley-Geer,D. L. Burke,D. L. Burke,J. Calcino,A. Carnero Rosell,Daniela Carollo,M. Carrasco Kind,M. Carrasco Kind,J. Carretero,F. J. Castander,M. Childress,J. De Vicente,Shantanu Desai,H. T. Diehl,P. Doel,B. Flaugher,Pablo Fosalba,Joshua A. Frieman,Joshua A. Frieman,Juan Garcia-Bellido,D. W. Gerdes,Daniel Gruen,Daniel Gruen,G. Gutierrez,W. G. Hartley,W. G. Hartley,Samuel Hinton,D. L. Hollowood,K. Honscheid,Ben Hoyle,Ben Hoyle,David J. James,Elisabeth Krause,Kyler Kuehn,N. Kuropatkin,Geraint F. Lewis,Marcos Lima,Edward Macaulay,M. A. G. Maia,Felipe Menanteau,Felipe Menanteau,C. J. Miller,Ramon Miquel,Ramon Miquel,Anais Möller,A. A. Plazas,A. K. Romer,A. Roodman,A. Roodman,E. J. Sanchez,V. Scarpine,Michael Schubnell,S. Serrano,I. Sevilla-Noarbe,Mathew Smith,R. C. Smith,Marcelle Soares-Santos,Flavia Sobreira,E. Suchyta,E. Swann,M. E. C. Swanson,Gregory Tarle,S. A. Uddin +77 more
TL;DR: In this article, the authors presented two measurements of supermassive black hole masses from reverberation mapping (RM) of the broad CIV emission line, which are based on multi-year photometry and spectroscopy from the DES-SN and the Australian Dark Energy Survey (OzDES), which together constitute the OzDES RM Program.
Journal ArticleDOI
Calibrating Mg II-based Black Hole Mass Estimators with Hβ Reverberation Measurements
Journal ArticleDOI
The spatially resolved broad line region of IRAS 09149-6206
António Amorim,M. Bauböck,Wolfgang Brandner,Yann Clénet,Ric Davies,P. T. de Zeeuw,P. T. de Zeeuw,Jason Dexter,Jason Dexter,Andreas Eckart,Andreas Eckart,Frank Eisenhauer,N. M. Förster Schreiber,Feng Gao,Paulo J. V. Garcia,Paulo J. V. Garcia,Paulo J. V. Garcia,Reinhard Genzel,Reinhard Genzel,Stefan Gillessen,Damien Gratadour,Damien Gratadour,Sebastian F. Hönig,Makoto Kishimoto,Sylvestre Lacour,Sylvestre Lacour,Dieter Lutz,Florentin Millour,Hagai Netzer,T. Ott,Thibaut Paumard,Karine Perraut,Guy Perrin,Bradley M. Peterson,Bradley M. Peterson,P.-O. Petrucci,O. Pfuhl,Mercedes Prieto,Daniel Rouan,Jinyi Shangguan,T. Taro Shimizu,Marc Schartmann,Julia Stadler,Amiel Sternberg,Amiel Sternberg,Odele Straub,Christian Straubmeier,Eckhard Sturm,Linda J. Tacconi,Konrad R. W. Tristram,P. Vermot,S. D. von Fellenberg,I. Waisberg,Felix Widmann,Julien Woillez +54 more
TL;DR: In this article, the authors measured the size of the broad line region (BLR) and estimated the mass of the central black hole using an improved phase calibration method that reduces the differential phase uncertainty to 0.05° per baseline across the spectrum, and they detected a differential phase signal that reaches a maximum of ∼0.5° between the line and continuum.
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