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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Stability of the broad-line region geometry and dynamics in Arp 151 over seven years
A. Pancoast,Aaron J. Barth,Keith Horne,Tommaso Treu,Brendon J. Brewer,Vardha N. Bennert,Gabriela Canalizo,Elinor L. Gates,Weidong Li,Matthew A. Malkan,David J. Sand,T. Schmidt,Stefano Valenti,Jong-Hak Woo,Kelsey I. Clubb,Michael C. Cooper,Steven M. Crawford,Sebastian F. Hönig,Michael D. Joner,M. T. Kandrashoff,Mariana S. Lazarova,Anna Nierenberg,Encarni Romero-Colmenero,Donghoon Son,Erik Tollerud,Jonelle L. Walsh,Hartmut Winkler +26 more
TL;DR: In this paper, the authors used a geometric and dynamical model for the broad line region (BLR) of the Seyfert 1 galaxy Arp 151 to constrain the systematic uncertainties in nonvarying parameters such as the black hole mass.
Journal ArticleDOI
THE AKARI 2.5-5.0 μm SPECTRAL ATLAS OF TYPE-1 ACTIVE GALACTIC NUCLEI: BLACK HOLE MASS ESTIMATOR, LINE RATIO, AND HOT DUST TEMPERATURE
Dohyeong Kim,Myungshin Im,Ji Hoon Kim,Ji Hoon Kim,Hyunsung David Jun,Jong-Hak Woo,Hyung Mok Lee,Myung Gyoon Lee,Takao Nakagawa,Hideo Matsuhara,Takehiko Wada,Shinki Oyabu,Toshinobu Takagi,Youichi Ohyama,Seong-Kook Lee +14 more
TL;DR: In this paper, a 2.5-5.0 μm spectral region of 83 nearby (0.002 < z < 0.48) and bright (K < 14 mag) type-1 active galactic nuclei (AGNs) taken with the Infrared Camera on board AKARI is presented.
Journal ArticleDOI
Eddington-limited Accretion in z ∼ 2 WISE-selected Hot, Dust-obscured Galaxies
Jingwen Wu,Jingwen Wu,Hyunsung David Jun,Hyunsung David Jun,Roberto J. Assef,Chao-Wei Tsai,Edward L. Wright,Peter Eisenhardt,Andrew Blain,Daniel Stern,Tanio Díaz-Santos,Kelly D. Denney,Brian Hayden,Brian Hayden,Saul Perlmutter,Saul Perlmutter,Greg Aldering,Kyle Boone,Kyle Boone,Parker Fagrelius,Parker Fagrelius +20 more
TL;DR: Wu et al. as discussed by the authors measured the supermassive black hole masses of five z ∼ 2 Hot DOGs via broad Hα emission lines, using Keck/MOSFIRE and Gemini/FLAMINGOS-2.
Journal ArticleDOI
Time delay measurement of Mg II line in CTS C30.10 with SALT
Bozena Czerny,Aleksandra Olejak,Mateusz Rałowski,Szymon Kozłowski,Mary Loli Martinez Aldama,Michal Zajaček,Wojtek Pych,Krzysztof Hryniewicz,Grzegorz Pietrzyński,C. Sobrino Figaredo,Martin Haas,J. Sredzinska,Magdalena Krupa,Agnieszka Kurcz,Andrzej Udalski,Marek Górski,Vladimir Karas,Swayamtrupta Panda,Marzena Sniegowska,Mohammad-Hassan Naddaf,Marek J. Sarna +20 more
TL;DR: In this article, the authors measured the rest-frame time-lag of a distant bright quasar CTS C30.10 (z = 0.90052) with the Southern African Large Telescope (SALT).
Journal ArticleDOI
Spitzer space telescope measurements of dust reverberation lags in the seyfert 1 galaxy ngc 6418
Billy Vazquez,P. Galianni,Michael Richmond,Andrew Robinson,David J. Axon,David J. Axon,Keith Horne,Triana Almeyda,Michael Fausnaugh,Bradley M. Peterson,M. C. Bottorff,Jack F. Gallimore,Moshe Eltizur,Hagai Netzer,Thaisa Storchi-Bergmann,Alessandro Marconi,Alessandro Capetti,Dan Batcheldor,Catherine L. Buchanan,G. M. Stirpe,Makoto Kishimoto,Chris Packham,Enrique Pérez,Clive Tadhunter,John Upton,Vicente Estrada-Carpenter +25 more
TL;DR: In this article, the authors present results from a 15-month campaign of high-cadence (∼3 days) mid-infrared Spitzer and optical (B and V) monitoring of the Seyfert 1 galaxy NGC 6418, with the objective of determining the characteristic size of the dusty torus in this active galactic nucleus.
References
More filters
Journal ArticleDOI
Maps of Dust Infrared Emission for Use in Estimation of Reddening and Cosmic Microwave Background Radiation Foregrounds
TL;DR: In this article, a reprocessed composite of the COBE/DIRBE and IRAS/ISSA maps, with the zodiacal foreground and confirmed point sources removed, is presented.
Journal ArticleDOI
Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
TL;DR: In this paper, the authors presented a reprocessed composite of the COBE/DIRBE and IRAS/ISSA maps, with the zodiacal foreground and confirmed point sources removed.
Book
Numerical Recipes in FORTRAN
TL;DR: The Diskette v 2.04, 3.5'' (720k) for IBM PC, PS/2 and compatibles [DOS] Reference Record created on 2004-09-07, modified on 2016-08-08.
Journal ArticleDOI
Measuring Reddening with Sloan Digital Sky Survey Stellar Spectra and Recalibrating SFD
TL;DR: In this paper, the authors measured the difference between the measured and predicted colors of a star, as derived from stellar parameters from the Sloan Extension for Galactic Understanding and Exploration Stellar Parameter Pipeline, and achieved uncertainties of 56, 34, 25, and 29 mmag in the colors u − g, g − r, r − i, and i − z, per star.
Journal ArticleDOI
Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
TL;DR: Lee et al. as discussed by the authors measured the difference between the measured and predicted colors of a star, as derived from stellar parameters from the SEGUE Stellar Parameter Pipeline, and achieved uncertainties of 56, 34, 25, and 29 mmag in the colors u-g, g-r, r-i, and i-z, per star.