Discovery of the Most-Distant Double-Peaked Emitter at z=1.369
Birong Luo,W. N. Brandt,John D. Silverman,Iskra Strateva,Franz E. Bauer,Peter Capak,Jeyhan S. Kartaltepe,Bret D. Lehmer,V. Mainieri,Mara Salvato,Gyula P. Szokoly,Donald P. Schneider,Cristian Vignali +12 more
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In this paper, the authors reported the discovery of the most distant double-peaked emitter, CXOECDFS J033115.0-275518, at z = 1.369.Abstract:
We report the discovery of the most distant double-peaked emitter, CXOECDFS J033115.0-275518, at z = 1.369. A Keck/DEIMOS spectrum shows a clearly double-peaked broad Mg II λ2799 emission line, with FWHM ≈ 11,000 km s^(–1) for the line complex. The line profile can be well fitted by an elliptical relativistic Keplerian disk model. This is one of a handful of double-peaked emitters known to be a luminous quasar, with excellent multiwavelength coverage and a high-quality X-ray spectrum. CXOECDFS J033115.0-275518 is a radio-loud quasar with two radio lobes (FR II morphology) and a radio loudness of f_(5 GHz)/f_(4400 A) ≈ 429. The X-ray spectrum can be modeled by a power law with photon index 1.72 and no intrinsic absorption; the rest-frame 0.5-8.0 keV luminosity is 5.0 × 10^(44) erg s^(–1). The spectral energy distribution (SED) of CXOECDFS J033115.0-275518 has a shape typical for radio-loud quasars and double-peaked emitters at lower redshift. The local viscous energy released from the line-emitting region of the accretion disk is probably insufficient to power the observed line flux, and external illumination of the disk appears to be required. The presence of a big blue bump in the SED along with the unexceptional X-ray spectrum suggest that the illumination cannot arise from a radiatively inefficient accretion flow.read more
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The Extended Chandra Deep Field-South Survey: Optical spectroscopy of faint X-ray sources with the VLT and Keck
John D. Silverman,V. Mainieri,Mara Salvato,Günther Hasinger,Jacqueline Bergeron,Peter Capak,G. Szokoly,Alexis Finoguenov,Roberto Gilli,Piero Rosati,Paolo Tozzi,Cristian Vignali,David M. Alexander,W. N. Brandt,Bret D. Lehmer,Bret D. Lehmer,Bin Luo,David Rafferty,Yongquan Xue,Italo Balestra,Franz E. Bauer,Franz E. Bauer,Marcella Brusa,Andrea Comastri,Jeyhan S. Kartaltepe,Anton M. Koekemoer,Takamitsu Miyaji,Donald P. Schneider,Ezequiel Treister,L. Wisotski,M. Schramm +30 more
TL;DR: In this paper, the authors presented the results of a program to acquire high-quality optical spectra of X-ray sources detected in the Extended-Chandra Deep Field-South (E-CDF-S) and its central 2 Ms area.
Journal ArticleDOI
Identifying supermassive black hole binaries with broad emission line diagnosis
Yue Shen,Abraham Loeb +1 more
TL;DR: In this paper, double-peaked broad emission lines in active galactic nuclei may indicate the existence of a bound supermassive black hole (SMBH) binary where two distinct broad-line regions (BLRs) contribute together to the line profile.
Journal ArticleDOI
X-ray Emission from Optically Selected Radio-intermediate and Radio-loud Quasars
Brendan P. Miller,Brendan P. Miller,Brendan P. Miller,W. N. Brandt,Donald P. Schneider,Robert R. Gibson,A. T. Steffen,Jianfeng Wu +7 more
TL;DR: In this article, the authors present the results of an investigation into the X-ray properties of radio-intermediate and radio-loud quasars (RIQs and RLQs, respectively).
Journal ArticleDOI
Identifying Supermassive Black Hole Binaries With Broad Emission Line Diagnosis
Yue Shen,Abraham Loeb +1 more
TL;DR: In this paper, double-peaked broad emission lines in Active Galactic Nuclei (AGNs) were used to confirm the existence of a bound supermassive black hole (SMBH) binary where two distinct broad line regions contribute together to the line profile.
Journal ArticleDOI
Spitzer Observations of Young Red Quasars
TL;DR: In this article, the authors compare properties derived from their infrared spectral energy distributions (intrinsic active galactic nucleus (AGN) luminosity and far-infrared luminosity from star formation) to the host luminosities and morphologies from Hubble Space Telescope imaging, and black hole masses estimated from optical and/or nearinfrared spectroscopy.
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Astronomical Data Analysis Software and Systems
TL;DR: The ADS abstract service at: http://adswww.harvard.edu has been updated considerably in the last year and new capabilities in the search engine include searching for multi-word phrases and searching for various logical combinations of search terms.
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Advection-dominated Accretion: A Self-similar Solution
Ramesh Narayan,Insu Yi +1 more
TL;DR: In this article, the authors consider viscous rotating accretion flows in which most of the viscously dissipated energy is stored as entropy rather than being radiated, and obtain a family of self-similar solutions where the temperature of the accreting gas is nearly virial and the flow is quasi-spherical.
Journal ArticleDOI
Composite Quasar Spectra from the Sloan Digital Sky Survey
Daniel E. Vanden Berk,Gordon T. Richards,Amanda E. Bauer,Michael A. Strauss,Donald P. Schneider,Timothy M. Heckman,Donald G. York,Patrick B. Hall,Patrick B. Hall,Xiaohui Fan,Gillian R. Knapp,Scott F. Anderson,James Annis,Neta A. Bahcall,Mariangela Bernardi,John W. Briggs,Jon Brinkmann,Robert J. Brunner,Scott Burles,Larry N. Carey,Francisco J. Castander,Francisco J. Castander,A. J. Connolly,James H. Crocker,István Csabai,István Csabai,Mamoru Doi,Douglas P. Finkbeiner,Scott D. Friedman,Joshua A. Frieman,Joshua A. Frieman,Masataka Fukugita,James E. Gunn,Gregory S. Hennessy,Željko Ivezić,Stephen B. H. Kent,Stephen B. H. Kent,Peter Z. Kunszt,D. Q. Lamb,R. French Leger,Dan Long,Jon Loveday,Robert H. Lupton,Avery Meiksin,Aronne Merelli,Aronne Merelli,Jeffrey A. Munn,Heidi Jo Newberg,M. Newcomb,Robert C. Nichol,Russell Owen,Jeffrey R. Pier,Adrian Pope,Adrian Pope,Constance M. Rockosi,David J. Schlegel,Walter A. Siegmund,Stephen A. Smee,Stephen A. Smee,Yehuda Snir,Chris Stoughton,Christopher W. Stubbs,Mark SubbaRao,Alexander S. Szalay,Gyula P. Szokoly,Christy Tremonti,Alan Uomoto,Patrick Waddell,Brian Yanny,Wei Zheng +69 more
TL;DR: In this article, a variety of composite quasar spectra using a homogeneous data set of over 2200 spectra from the Sloan Digital Sky Survey (SDSS) was created, and the median composite covers a restwavelength range from 800 to 8555 A and reaches a peak signal-to-noise ratio of over 300 per 1 A resolution element in the rest frame.
Journal ArticleDOI
Atlas of quasar energy distributions
Martin Elvis,Belinda Jane Wilkes,Jonathan C. McDowell,Richard F. Green,Jill Bechtold,Steven P. Willner,M. S. Oey,M. S. Oey,Elisha Polomski,Elisha Polomski,Roc Cutri +10 more
TL;DR: In this article, the spectral energy distributions (SEDs) of normal, nonblazar, quasars over the whole available range (radio to 10 keV X-rays) of the electromagnetic spectrum are presented.
Journal ArticleDOI
Composite Quasar Spectra From the Sloan Digital Sky Survey
TL;DR: In this article, the authors created a variety of composite quasar spectra using a homogeneous data set of over 2200 spectra from the Sloan Digital Sky Survey (SDSS).