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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Discovery of a Remarkably Powerful Broad Absorption Line Quasar Outflow in SDSS J135246.37+423923.5
Hyunseop Choi,Karen M. Leighly,Donald M. Terndrup,Donald M. Terndrup,Sarah C. Gallagher,Gordon T. Richards +5 more
TL;DR: In this article, the authors analyzed the rest-UV spectrum of an "overlapping trough" iron low-ionization broad absorption line quasar (FeLoBAL) SDSS J135246.37+423923.5 using the novel spectral synthesis code SimBAL and discovered an extraordinarily fast and energetic BAL outflow.
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PS1-13cbe: the rapid transition of a Seyfert 2 to a Seyfert 1
Reza Katebi,Ryan Chornock,Edo Berger,David O. Jones,Ragnhild Lunnan,Raffaella Margutti,Armin Rest,Armin Rest,Daniel Scolnic,William S. Burgett,Nick Kaiser,Rolf-Peter Kudritzki,Eugene A. Magnier,Richard J. Wainscoat,Christopher Waters +14 more
TL;DR: A nuclear transient event, PS1-13cbe, was first discovered in the Pan-STARRS1 survey in 2013 as discussed by the authors, and it occurred in the nucleus of the galaxy SDSS J222153.87+003054.2 at z = 0.12.
Journal ArticleDOI
Black hole mass measurement using ALMA observations of [CI] and CO emissions in the Seyfert 1 galaxy NGC 7469
Dieu D. Nguyen,Takuma Izumi,Takuma Izumi,Sabine Thater,Masatoshi Imanishi,Masatoshi Imanishi,T. Kawamuro,T. Kawamuro,Shunsuke Baba,Suzuka Nakano,Jean L. Turner,Kotaro Kohno,Satoki Matsushita,Sergio Martín,David S. Meier,Phuong M. Nguyen,Lam T. Nguyen +16 more
TL;DR: In this paper, a supermassive black hole (SMBH) mass measurement in the Seyfert 1 galaxy NGC7469 using Atacama Large Millimeter/submillimeter Array (ALMA) observations of the atomic and molecular CO(1-0) emission lines is presented.
Journal ArticleDOI
Extended X-ray Monitoring of Gravitational Lenses with Chandra and Joint Constraints on X-ray Emission Regions
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TL;DR: In this article, an X-ray photometric analysis of six gravitationally lensed quasars, with observation campaigns spanning from 5 to 14 years, measuring the total (0.83 - 21.8 keV) band image flux ratios or each epoch.
Journal ArticleDOI
Mid-Infrared Selected Quasars I: Virial Black Hole Mass and Eddington Ratios
Y. Sophia Dai,Y. Sophia Dai,Martin Elvis,Jacqueline Bergeron,Giovanni G. Fazio,Jiasheng Huang,Belinda Jane Wilkes,Christopher N. A. Willmer,Alain Omont,Casey Papovich +9 more
TL;DR: In this paper, a catalog of 391 mid-infrared-selected (MIR, 24$\mu$m) broad-emission-line (BEL, type 1) quasars in the 22 deg$^2$ SWIRE Lockman Hole field is provided.
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.