Results 151 to 160 of about 79,854 (251)

ePoster

European Journal of Neurology, Volume 32, Issue S1, June 2025.
wiley   +1 more source

Long-time-scale optical variability in quasars [PDF]

, 1976
Timothy M. Heckman
openalex   +1 more source

Cosmic Himalayas: The Highest Quasar Density Peak Identified in a 10,000 deg2 Sky with Spatial Discrepancies between Galaxies, Quasars, and IGM H i

The Astrophysical Journal
We report the identification of a quasar overdensity in the BOSSJ0210 field, dubbed the Cosmic Himalayas, consisting of 11 quasars at z = 2.16−2.20, the densest overdensity of quasars (17 σ ) in the ∼10,000 deg ^2 of the Sloan Digital Sky Survey (SDSS ...
Yongming Liang, Masami Ouchi, Dongsheng Sun, Nobunari Kashikawa, Zheng Cai, Sebastiano Cantalupo, Kentaro Nagamine, Hidenobu Yajima, Takanobu Kirihara, Haibin Zhang, Mingyu Li, Rhythm Shimakawa, Xiaohui Fan, Kei Ito, Masayuki Tanaka, Yuichi Harikane, J. Xavier Prochaska, Andrea Travascio, Weichen Wang, Martin Elvis, Giuseppina Fabbiano, Junya Arita, Masafusa Onoue, John D. Silverman, Dong Dong Shi, Fangxia An, Takuma Izumi, Kazuhiro Shimasaku, Hisakazu Uchiyama, Chenghao Zhu   +29 more
doaj   +1 more source

Brightly shines the X-ray quasar [PDF]

, 1975
John Gribbin
openalex   +1 more source

Wavelengths of [Fe II] from quasar J110325-264515 for a study of space-time variations in the fine-structure constant

Results in Physics, 2019
We report a new stringent limit relating to the space-time variation in the fine-structure constant α=e24πε0ℏc from an analysis of quasar J110325-264515 towards zabs=1.8389. We find Δα/α=(1.56±1.78)×10-6 from a comparison of laboratory wavelengths of [Fe
T.D. Le
doaj  

A Catalogue of Quasars [PDF]

, 1971
J. B. de Veny, W. Osborn, K. A. Janes
openalex   +1 more source

A Targeted Search for Variable Gravitationally Lensed Quasars

The Astrophysical Journal
We present a pipeline to identify photometric variability within strong gravitationally lensing candidates, in the Dark Energy Spectroscopic Instrument Legacy Imaging Surveys.
William Sheu, Xiaosheng Huang, Aleksandar Cikota, Nao Suzuki, Antonella Palmese, David J. Schlegel, Christopher Storfer   +6 more
doaj   +1 more source

An Electrodynamic Model of Radio Galaxies and Quasars [PDF]

, 1970
J. H. Piddington
openalex   +1 more source

Gemini Near Infrared Spectrograph−Distant Quasar Survey: Rest-frame Ultraviolet−Optical Spectral Properties of Broad Absorption Line Quasars

The Astrophysical Journal
We present the rest-frame ultraviolet−optical spectral properties of 65 broad absorption line (BAL) quasars from the Gemini Near Infrared Spectrograph−Distant Quasar Survey (GNIRS-DQS). These properties are compared with those of 195 non-BAL quasars from
Harum Ahmed, Ohad Shemmer, Brandon Matthews, Cooper Dix, Trung Ha, Gordon T. Richards, Michael S. Brotherton, Adam D. Myers, W. N. Brandt, Sarah C. Gallagher, Richard Green, Paulina Lira, Jacob N. McLane, Richard M. Plotkin, Donald P. Schneider   +14 more
doaj   +1 more source

Quasar Absorption Lines and Radio Polarization [PDF]

, 1970
F. F. Gardner, J. B. Whiteoak
openalex   +1 more source