Results 81 to 90 of about 111,891 (295)

Exploratory Chandra Observations of the Three Highest Redshift Quasars Known

, 2002
We report on exploratory Chandra observations of the three highest redshift quasars known (z = 5.82, 5.99, and 6.28), all found in the Sloan Digital Sky Survey.
Bing Chen, Daniel E. Vanden Berk, Donald G. York, Donald P. Schneider, Donald Q. Lamb, G. S. Hennessy, Gordon T. Richards, J. Brinkmann, James E. Gunn, Michael A. Strauss, Neta A. Bahcall, Robert Brunner, Scott F. Anderson, William N. Brandt, Wolfgang Voges, Xiaohui Fan, Zickgraf F. J.   +16 more
core   +1 more source

Supermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. XII. Reverberation Mapping Results for 15 PG Quasars from a Long-duration High-cadence Campaign [PDF]

, 2021
Chen Hu, Shasha Li, Sen Yang, Zi-Xu Yang, Wei-Jian Guo, Dong-Wei Bao, Bo-Wei Jiang, Pu Du, Yan-Rong Li, Ming Xiao, Yu-Yang Songsheng, Zhe Yu, Jin‐Ming Bai, Luis C. Ho, M. S. Brotherton, J. Aceituno, Hartmut Winkler, Jian‐Min Wang   +17 more
openalex   +1 more source

Acute metabolic responses to high‐intensity interval training in men with overweight or obesity: Does the exercise modality matter?

Experimental Physiology, EarlyView.
Abstract This study investigated the acute effects of two isoenergetic high‐intensity interval exercise (HIIE) sessions, running (HIIE‐RUN) and cycling (HIIE‐BIKE), on post‐exercise oxygen consumption (V̇O2${\dot V_{{{\mathrm{O}}_2}}}$), carbon dioxide production (V̇CO2${\dot V_{{\mathrm{C}}{{\mathrm{O}}_2}}}$), substrate oxidation and 24‐h energy ...
Annaëlle Couvert, Mélanie Rance, Eric Doré, Vincent Martin, Duane Beraud, Claire Morel, Bruno Pereira, Antonio Herbert Lancha Junior, Nathalie Boisseau   +8 more
wiley   +1 more source

Highly Accreting Quasars at High Redshift

Frontiers in Astronomy and Space Sciences, 2018
We present preliminary results of a spectroscopic analysis for a sample of type 1 highly accreting quasars (L/LEdd ~ 1.0) at high redshift, z ~2–3.
Mary L. Martínez-Aldama, Ascensión Del Olmo, Paola Marziani, Jack W. Sulentic, C. Alenka Negrete, Deborah Dultzin, Jaime Perea, Mauro D'Onofrio   +7 more
doaj   +1 more source

Exploiting the IRT-THESEUS Capability to Observe Lensed Quasars

Galaxies, 2021
THESEUS is an ESA space based project, which aims to explore the early universe by unveiling a complete census of Gamma-ray Burst (GRB) population in the first billion years.
Lindita Hamolli, Mimoza Hafizi, Francesco De Paolis, Achille A. Nucita   +3 more
doaj   +1 more source

Infrared properties of serendipitous X-ray quasars [PDF]

, 1982
Near infrared measurements were obtained of 30 quasars originally found serendipitously as X-ray sources in fields of other objects. The observations show that the infrared characteristics of these quasars do not differ significantly from those of ...
Chanan, G. A., Margon, B., Matthews, K., Neugebauer, G., Soifer, B. T.   +4 more
core   +1 more source

The FIRST Bright Quasar Survey III. The South Galactic Cap [PDF]

, 2001
We present the results of an extension of the FIRST Bright Quasar Survey (FBQS) to the South Galactic cap, and to a fainter optical magnitude limit. Radio source counterparts with SERC R magnitudes brighter than 18.9 which meet the other FBQS criteria ...
Chris D. Impey, David J. Helf, Deanne D. Proctor, etal., Frederic Courbin, Frederic H. Chaffee, Gordon T. Richards, Mark Lacy, Michael D. Gregg, Michael S. Brotherton, Richard L. White, Robert H. Becker, Sally A. Laurent-muehleisen   +12 more
core   +2 more sources

First In Vivo 23Na Human Imaging at 10.5 T Using a Combined Sodium‐Proton Transceiver Body Array

Magnetic Resonance in Medicine, Volume 95, Issue 4, Page 2429-2441, April 2026.
ABSTRACT Purpose To demonstrate the first in vivo human 23Na MRI at 10.5 T using a novel dual‐tuned transceiver body array and to evaluate a self‐gating approach for respiratory motion compensation, focusing on renal imaging. Methods A custom‐built eight‐channel 23Na‐loop 1H‐dipole transceiver array was designed, constructed, and characterized.
Simon Schmidt, Arcan M. Ertürk, Gregory J. Metzger   +2 more
wiley   +1 more source

The Cosmic Ultraviolet Baryon Survey (CUBS). VIII. Group Environment of the Most Luminous Quasars at z ≈ 1

The Astrophysical Journal
We investigate the group-scale environment of 15 luminous quasars (luminosity L _3000 > 10 ^46 erg s ^−1 ) from the Cosmic Ultraviolet Baryon Survey (CUBS) at redshift z ≈ 1.
Jennifer I-Hsiu Li, Sean D. Johnson, Erin Boettcher, Sebastiano Cantalupo, Hsiao-Wen Chen, Mandy C. Chen, David R. DePalma, Zhuoqi (Will) Liu, Nishant Mishra, Patrick Petitjean, Zhijie Qu, Gwen C. Rudie, Joop Schaye, Fakhri S. Zahedy   +13 more
doaj   +1 more source

FIRST-2MASS Red Quasars: Transitional Objects Emerging from the Dust [PDF]

, 2012
We present a sample of 120 dust-reddened quasars identified by matching radio sources detected at 1.4 GHz in the FIRST survey with the near-infrared 2MASS catalog and color-selecting red sources.
Adam D. Myers, Adelman-McCarthy, Aihara, Ashish Mahabal, Becker, Becker, Bennert, Brotherton, Cutri, Donald G. York, Donald P. Schneider, Drinkwater, Eilat Glikman, Eisenstein, Farrah, Ferrarese, Gallagher, Gebhardt, Glikman, Glikman, Glikman, Glikman, Glikman, Gordon, Gordon, Grazian, Gregg, Gunn, Gunn, Haiman, Hall, Herter, Hopkins, Hopkins, Hopkins, Hopkins, Hopkins, Ivezić, Jian Ge, Kim, Kocevski, Lacy, Lacy, Lasker, Lawrence, Lawrence, Magorrian, Marconi, Mark Lacy, Martini, McMahon, Menou, Misselt, Netzer, Nicholas P. Ross, Osterbrock, Oyabu, Patrick Petitjean, Polletta, Polletta, Rawlings, Richards, Richards, Richards, Richards, Richards, Ross, S. George Djorgovski, Schawinski, Schneider, Shen, Simmons, Skrutskie, Smith, Stoughton, Sturm, Tanya Urrutia, Telfer, Treister, Treister, Treister, Trump, Urrutia, Urrutia, Urrutia, Vanden Berk, White, White, White, White, Wright, York, Yu, Zakamska, Zakamska, Zakamska   +95 more
core   +3 more sources