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Long-Term X-Ray Variability of Typical Active Galactic Nuclei in the Distant Universe
This article discusses the long-term (≈15 years, observed frame) X-ray variability analyses of the 68 brightest radio-quiet active galactic nuclei (AGNs) in the 6 Ms Chandra Deep Field-South survey.
Date:
November 3, 2016
Creator:
Yang, G.; Brandt, William Nielsen; Luo, Bin; Xue, Yongquan; Bauer, Franz E.; Sun, M. et al.
Object Type:
Article
System:
The UNT Digital Library
Magnetobound positronium and protonium
This article investigates the formation of magnetobound positronium and protonium via classical trajectory simulations of binary point charge interactions in an external magnetic field. The results of computer simulations of the fully three-dimensional trajectories of classical and non-relativistic point charges with the same mass, equal charge magnitude, and opposite sign are reported. The simulations show the formation of magnetobound positronium and protonium. The results yield formation cross sections, which are compared to analytical expressions. Additionally, the results reveal that magnetobound states drift across magnetic field lines.
Date:
August 27, 2014
Creator:
Correa, J. R. & Ordonez, Carlos A.
Object Type:
Article
System:
The UNT Digital Library
Methods and Devices for Electromagnetically Tuning Acoustic Media
Patent relating to methods and devices for electromagnetically tuning acoustic media.
Date:
May 2, 2012
Creator:
Neogi, Arup & Walker, Ezekiel
Object Type:
Patent
System:
The UNT Digital Library
Magnetic Control of a Charge-Neutralized Ion Beam
This paper from the 23rd Conference on Application of Accelerators in Research and Industry conference proceedings presents a scheme for controlling charge-neutralized beams using a distortion of a magnetic guide field via the presence of two current carrying wires.
Date:
June 18, 2015
Creator:
Phillips, R. E. & Ordonez, Carlos A.
Object Type:
Article
System:
The UNT Digital Library
Effect of noise and detector sensitivity on a dynamical process: Inverse power law and Mittag-Leffler interevent time survival probabilities
Article on the effect of noise and detector sensitivity on a dynamical process and the inverse power law and Mittag-Leffler interevent time survival probabilities.
Date:
February 10, 2014
Creator:
Pramukkul, Pensri; Svenkeson, Adam & Grigolini, Paolo
Object Type:
Article
System:
The UNT Digital Library
A Population of X-Ray Weak Quasars: PHL 1811 Analogs at High Redshift
This article reports the results from Chandra and XMM-Newton observations of a sample of 10 type 1 quasars selected to have unusual UV emission-line properties similar to those of PHL 1811.
Date:
April 15, 2011
Creator:
Wu, Jianfeng; Brandt, William Nielsen; Hall, Patrick B.; Gibson, Robert R.; Richards, Gordon T.; Schneider, Donald P. et al.
Object Type:
Article
System:
The UNT Digital Library
On The Performance of Quasar Reverberation Mapping in the Era of Time-Domain Photometric Surveys
This article quantitatively assesses, by means of comprehensive numerical simulations, the ability of broadband photometric surveys to recover the broad emission line region size in quasars under various observing conditions and for a wide range of object properties.
Date:
February 2, 2014
Creator:
Chelouche, Doron; Shemmer, Ohad; Cotlier, Gabriel I.; Barth, Aaron J. & Rafter, Stephen E.
Object Type:
Article
System:
The UNT Digital Library
Exploratory X-Ray Monitoring of Luminous Radio-Quiet Quasars at High Redshift: Initial Results
This article presents initial results from an exploratory X-ray monitoring project of two groups of comparably luminous radio-quiet quasars.
Date:
January 17, 2014
Creator:
Shemmer, Ohad; Brandt, William Nielsen; Paolillo, Maurizio; Kaspi, Shai; Vignali, Christian; Stein, Matthew S. et al.
Object Type:
Article
System:
The UNT Digital Library
Extreme Star Formation in the Host Galaxies of the Fastest Growing Supermassive Black Holes at z = 4.8
This article reports new Herschel observations of extremely luminous optically selected active galactic nuclei.
Date:
March 5, 2012
Creator:
Mor, Rivay; Netzer, Hagai; Trakhtenbrot, Benny; Shemmer, Ohad & Lira, Paulina
Object Type:
Article
System:
The UNT Digital Library
Black Hole Mass and Growth Rate at z ≃4.8: A Short Episode of Fast Growth Followed by Short Duty Cycle Activity
This article presents H-band spectroscopy for a flux-limited sample of 40 z≃ 4.8 active galactic nuclei, selected from the Sloan Digital Sky Survey.
Date:
December 10, 2010
Creator:
Trakhtenbrot, Benny; Netzer, Hagai; Lira, Paulina & Shemmer, Ohad
Object Type:
Article
System:
The UNT Digital Library
The Chandra Deep Field-South Survey: 4 Ms Source Catalogs
This article presents source catalogs for the 4 Ms Chandra Deep Field-South.
Date:
May 24, 2011
Creator:
Xue, Yongquan; Luo, Bin; Brandt, William Nielsen; Bauer, Franz E.; Lehmer, Bret; Broos, Patrick et al.
Object Type:
Article
System:
The UNT Digital Library
The 4Ms Chandra Deep Field-South Number Counts Apportioned By Source Class: Pervasive Active Galactic Nuclei and the Ascent of Normal Galaxies
This article presents cumulative and differential number-count measurements for the recently completed 4 Ms Chandra Deep Field-South survey.
Date:
April 9, 2012
Creator:
Lehmer, Bret; Xue, Yongquan; Brandt, William Nielsen; Alexander, David M.; Bauer, Franz E.; Brusa, Marcella et al.
Object Type:
Article
System:
The UNT Digital Library
Beyond the Death of Linear Response: 1/f Optimal Information Transport
Article discussing research on linear response and 1/f optimal information transport.
Date:
July 21, 2010
Creator:
Aquino, Gerardo; Bologna, Mauro; Grigolini, Paolo & West, Bruce J.
Object Type:
Article
System:
The UNT Digital Library
Publisher's Note: Beyond the Death of Linear Response: 1/f Optimal Information Transport [Phys. Rev. Lett. 105,040601 (2010)]
This is a Publisher's Note for the article 'Beyond the Death of Linear Response: 1/f Optimal Information Transport' [Phys. Rev. Lett. 105, 040601 (2010)].
Date:
August 3, 2010
Creator:
Aquino, Gerardo; Bologna, Mauro; Grigolini, Paolo & West, Bruce J.
Object Type:
Text
System:
The UNT Digital Library
Coupling of Surface Plasmon Polariton in Al-Doped ZnO with Fabry-Pérot Resonance for Total Light Absorption
This article presents finite-difference time-domain (FDTD) simulations on total light absorption (TLA) resulting from the coupling of a surface plasmon polariton (SPP) with Fabry-Pérot (F-P) resonance in a three-layer structure consisting of an AZO square lattice hole array, a spacer, and a layer of silver.
Date:
April 27, 2017
Creator:
George, David; Adewole, Murthada; Hassan, Safaa; Lowell, David; Cui, Jingbiao; Zhang, Hualiang et al.
Object Type:
Article
System:
The UNT Digital Library
Synthesis of Columnar Hydrogel Colloidal Crystals in Water-organic Solvent Mixture
Patent relating to the synthesis of columnar hydrogel colloidal crystals in a water-organic solvent mixture.
Date:
September 21, 2006
Creator:
Hu, Zhibing; Zhou, Jun; Cai, Tong; Tang, Shijun & Marquez, Manuel
Object Type:
Patent
System:
The UNT Digital Library
Single Reflective Optical Element for Interference Lithography
Patent relating to optical elements for use in interference lithography.
Date:
August 1, 2014
Creator:
Lin, Yuankun; Lutkenhaus, Jeffrey & George, David
Object Type:
Patent
System:
The UNT Digital Library
Tunable Polymer-Based Sonic Structures
Patent relating to methods and devices for controlling the propagation of sound and particularly to tunable polymer-based sonic structures.
Date:
November 14, 2013
Creator:
Walker, Ezekiel; Neogi, Arup & Cai, Tong
Object Type:
Patent
System:
The UNT Digital Library
Aqueous Dispersion of Hydrogel Nanoparticles with Inverse Thermoreversible Gelation
Patent relating to aqueous dispersion of hydrogel nanoparticles with inverse thermoreversible gelation.
Date:
December 9, 2004
Creator:
Hu, Zhibing & Xia, Xiaohu
Object Type:
Patent
System:
The UNT Digital Library
Radial Expansion of a Low Energy Positron Beam Passing Through a Cold Electron Plasma within a Uniform Magnetic Field
This paper from the 23rd Conference on Application of Accelerators in Research and Industry conference proceedings studies the radial expansion of a low energy positron beam passing through a cold electron plasma within a uniform magnetic field using a classical trajectory Monte Carlo simulation.
Date:
June 18, 2015
Creator:
Aguirre, F. F. & Ordonez, Carlos A.
Object Type:
Article
System:
The UNT Digital Library
Evaluation of the Biological Effects of Externally Tunable, Hydrogel Encapsulated Quantum Dot Nanospheres in Escherichia coli
This article presents the biological effects of a novel hydrogel based quantum dot nano-structure on E. coli bacteria.
Date:
August 8, 2011
Creator:
GhoshMitra, Somesree; Diercks, David; Hu, Zhibing; Roberts, James A.; Dahiya, Jai; Mills, Nathaniel et al.
Object Type:
Article
System:
The UNT Digital Library
Energy transfer in ZnO-anthracene hybrid structure
This article investigates the origin of the modification of the emission properties of the hybrid structure using temperature dependent and time-dependent photoluminescence spectroscopy.
Date:
April 4, 2012
Creator:
Shimada, Ryoko; Urban, Ben E.; Sharma, Mamta; Singh, Akhilesh; Avrutin, Vitaliy; Morkoç, Hadis et al.
Object Type:
Article
System:
The UNT Digital Library
The X-Ray Properties of the Optically Brightest Mini-Bal Quasars from the Sloan Digital Sky Survey
This article compiles a sample of 14 of the optically brightest radio-quiet quasars in the Sloan Digital Sky Survey Data Release 5 quasar catalog that have mini-broad absorption lines present in their spectra.
Date:
September 12, 2010
Creator:
Wu, Jianfeng; Brandt, William Nielsen; Comins, M.L.; Gibson, Robert R.; Shemmer, Ohad; Garmire, Gordon P. et al.
Object Type:
Article
System:
The UNT Digital Library
X-Ray Spectral Constraints for z ≈ 2 Massive Galaxies: The Identification of Reflection-Dominated Active Galactic Nuclei
This article uses the 4 Ms Chandra Deep Field-South survey to place direct constraints on the ubiquity of z ≈ 2 heavily obscured active galactic nuclei.
Date:
June 6, 2011
Creator:
Alexander, David M.; Bauer, Franz E.; Brandt, William Nielsen; Daddi, Emanuele; Hickox, Ryan; Lehmer, Bret et al.
Object Type:
Article
System:
The UNT Digital Library