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Near-Infrared Spectroscopy of High-Redshift Active Galactic Nuclei. I. A Metallicity-Accretion Rate Relationship
This article presents near-infrared spectroscopic measurements of the Hβ region for a sample of 29 luminous high-redshift quasars.
Date:
June 22, 2004
Creator:
Shemmer, Ohad; Netzer, Hagai; Maiolino, Roberto; Oliva, Ernesto; Croom, Scott; Corbett, E. et al.
System:
The UNT Digital Library
A new, faint population of X-ray transients
This article reports on the detection of a remarkable new fast high-energy transient found in the Chandra Deep Field-South, robustly associated with a faint host in the CANDELS survey.
Date:
February 15, 2017
Creator:
Bauer, Franz E.; Treister, Ezequiel; Schawinski, K.; Schulze, S.; Luo, Bin; Alexander, David M. et al.
System:
The UNT Digital Library
Shedding New Light on Weak Emission-Line Quasars in the CIV-Hβ Parameter Space
Article describes how weak emission-line quasars (WLQs) are a subset of Type 1 quasars that exhibit extremely weak Lyα+N V λ1240 and/or C IV λ1549 emission lines. The authors investigate the relationship between emission-line properties and accretion rate for a sample of 230 `ordinary' Type 1 quasars and 18 WLQs at z<0.5 and 1.5<z<3.5 that have rest-frame ultraviolet and optical spectral measurements.
Date:
April 10, 2023
Creator:
Ha, Trung; Dix, Cooper; Matthews, Brandon M.; Shemmer, Ohad; Brotherton, Michael S.; Myers, Adam D. et al.
System:
The UNT Digital Library
Exploring Changes in Quasar Spectral Energy Distributions across C iv Parameter Space
This article examines the UV/X-ray properties of 1378 quasars in order to link empirical correlations to theoretical models of the physical mechanisms dominating quasars as a function of mass and accretion rate.
Date:
June 6, 2022
Creator:
Rivera, Angelica B.; Richards, Gordon T.; Gallagher, Sarah C.; McCaffrey, Trevor V.; Rankine, Amy L.; Hewett, Paul C. et al.
System:
The UNT Digital Library
Comparative Trace Elemental Analysis in Cancerous and Noncancerous Human Tissues Using PIXE
Article discussing comparative trace elemental analysis in cancerous and noncancerous human tissues using PIXE.
Date:
May 16, 2013
Creator:
Mulware, Stephen Juma
System:
The UNT Digital Library
Comparative Trace Elemental Analysis in Cancerous and Noncancerous Human Tissues Using PIXE
This article reviews comparative trace elemental concentrations of cancerous and noncancerous tissues using PIXE.
Date:
May 16, 2013
Creator:
Mulware, Stephen Juma
System:
The UNT Digital Library
The Mammary Gland Carcinogens: The Role of Metal Compounds and Organic Solvents
This article reviews the role of metal compounds and organic solvents in breast cancer development.
Date:
April 24, 2013
Creator:
Mulware, Stephen Juma
System:
The UNT Digital Library
The Mammary Gland Carcinogens: The Role of Metal Compounds and Organic Solvents
Article on mammary gland carcinogens and the role of metal compounds and organic solvents.
Date:
April 24, 2013
Creator:
Mulware, Stephen Juma
System:
The UNT Digital Library
Reddening, Emission-Line, and Intrinsic Absorption Properties in the Narrow-Line Seyfert 1 Galaxy Arakelian 564
This article uses Hubble Space Telescope UV and optical spectra of the narrow-line Seyfert 1 galaxy Ark 564 to investigate its internal reddening and properties of its emission-line and intrinsic UV absorption gas.
Date:
October 12, 2001
Creator:
Crenshaw, D.M.; Kraemer, S.B.; Turner, T.J.; Collier, S.; Peterson, Bradley M.; Brandt, William Nielsen et al.
System:
The UNT Digital Library
The X-ray Spectral Properties and Variability of Luminous High-Redshift Active Galactic Nuclei
This article contains a detailed investigation of moderate- to high-quality X-ray spectra of 10 of the most luminous active galactic nuclei known at z > 4.
Date:
May 20, 2005
Creator:
Shemmer, Ohad; Brandt, William Nielsen; Vignali, Christian; Schneider, Donald P.; Fan, Xiaohui; Richards, Gordon T. et al.
System:
The UNT Digital Library
FAUST observations of ultraviolet sources in the directions of NGC 4038-39 and 6752
This article discusses an analysis of ultraviolet observations with the FAUST shuttle-borne telescope toward the Antennae and NGC 6752 celestial regions resulting in the detection of 46 and 221 candidate sources respectively, for a signal-to-noise ratio of 8.
Date:
December 29, 2000
Creator:
Daniels, Julian; Brosch, Noah; Almoznino, Elchanan; Shemmer, Ohad; Bowyer, Stuart & Lampton, Michael
System:
The UNT Digital Library
A Chandra Survey of the X-Ray Properties of Board Absorption Line Radio-Loud Quasars
This article presents the results of a Chandra study of 21 broad absorption line radio-loud quasars.
Date:
July 14, 2009
Creator:
Miller, Brendan; Brandt, William Nielsen; Gibson, Robert R.; Garmire, Gordon P. & Shemmer, Ohad
System:
The UNT Digital Library