Results 81 to 90 of about 16,078 (195)

PG 1004+130: Hybrid Morphology Source or a Restarted FRII? A uGMRT Polarimetric Investigation

The Astrophysical Journal, 2023
We present the polarization image of the hybrid morphology and broad absorption line quasar PG 1004+130 at 694 MHz obtained with the upgraded Giant Metrewave Radio Telescope. We detect linear polarization in this source’s core, jets, and lobes.
Salmoli Ghosh, P. Kharb, J. Baghel, S. Silpa   +3 more
doaj   +1 more source

The Sloan Digital Sky Survey Reverberation Mapping Project: Rapid CIV Broad Absorption Line Variability

, 2015
We report the discovery of rapid variations of a high-velocity CIV broad absorption line trough in the quasar SDSS J141007.74+541203.3. This object was intensively observed in 2014 as a part of the Sloan Digital Sky Survey Reverberation Mapping Project ...
Alam S., Arav N., Audrey Simmons, B. M. Peterson, Barlow T. A., Borguet B. C. J., C. J. Grier, C. S. Kochanek, Charling Tao, Chavushyan V. O., D. P. Schneider, Daniel Oravetz, Dawson K. S., Dexter J., Dmitry Bizyaev, Dunn J. P., Eisenstein D. J., Filiz Ak N., Filiz Ak N., Gallagher S. C., Gibson R. R., Gibson R. R., Gibson R. R., Gibson R. R., Gunn J. E., Hall P. B., Hopkins P. F., I. Pâris, Ian D. McGreer, J. R. Trump, Jian Ge, K. D. Denney, K. S. Dawson, Kaike Pan, Karen Kinemuchi, Kaspi S., Kelly B. C., Krolik J. H., Landi E., Laor A., Leighly K. M., Linhua Jiang, Lucy A. B., Lundgren B. F., M. Vivek, Marshall H. L., N. Filiz Ak, P. B. Hall, Paul J. Green, Peterson B. M., Proga D., Rafiee A., Richards G. T., Richards G. T., Saez C., Schlegel D. J., Shemmer O., Shen Y., Smee S. A., Stepanian J. A., Vanden Berk D. E., W. M. Wood-Vasey, W. N. Brandt, Yue Shen, Yuguang Chen   +64 more
core   +1 more source

The Physical Nature of Polar Broad Absorption Line Quasars [PDF]

The Astrophysical Journal, 2007
To appear in ApJ ...
Ghosh, Kajal K., Punsly, Brian
openaire   +2 more sources

Comprehensive Connection among the Quasars with Different Types of Outflow Absorption Lines

The Astrophysical Journal
It is commonly accepted that outflows from the central regions of quasars play a substantial role in regulating the global properties of the host galaxy. These outflows are typically detected through blueshifted absorption lines.
Xing-Long Peng, Zhi-Fu Chen, Zhi-Cheng He, Ting-Ting Pang, Zhi-Wen Wang   +4 more
doaj   +1 more source

Discovery of H alpha absorption in the unusual broad absorption line quasar SDSS J083942.11+380526.3

, 2006
We discovered an H alpha absorption in a broad H alpha emission line of an unusual broad absorption line quasar, SDSS J083942.11+380526.3 at z=2.318, by near-infrared spectroscopy with the Cooled Infrared Spectrograph and Camera for OHS (CISCO) on the ...
Ikuru Iwata, Iye M., Kentaro Aoki, Kouji Ohta, Masataka Ando, Masayuki Akiyama, Motohara K., Naoyuki Tamura, Sergeev S. G.   +8 more
core   +1 more source

Fading Light, Fierce Winds: JWST Snapshot of a Sub-Eddington Quasar at Cosmic Dawn

The Astrophysical Journal Letters
The majority of most luminous quasars during the epoch of reionization accrete near or above the Eddington limit, marking the vigorous growth of primitive supermassive black holes (SMBHs).
Jianwei Lyu, George H. Rieke, Meredith Stone, Jane Morrison, Stacey Alberts, Xiangyu Jin, Yongda Zhu, Weizhe Liu, Jinyi Yang   +8 more
doaj   +1 more source

Quasar Winds Caught on Acceleration and Deceleration

The Astrophysical Journal Supplement Series
We present an observational study of wind acceleration based on four low-ionization broad absorption line (BAL) quasars (J0136, J1238, J1259, and J1344).
Weimin Yi, P. B. Hall, Zunli Yuan, W. N. Brandt, D. P. Schneider, Zhicheng He, Jin-Ming Bai, Xue-Bing Wu   +7 more
doaj   +1 more source

Deep-Learning-Based Identification of Broad-Absorption Line Quasars

Applied Sciences
The accurate classification of broad-absorption line (BAL) quasars and non-broad-absorption line (non-BAL) quasars is key in understanding active galactic nuclei (AGN) and the evolution of the universe.
Sen Pang, Hoiio Kong, Zijun Li, Weibo Kao, Yanxia Zhang   +4 more
doaj   +1 more source

AGN with extreme X-ray amplitude variations

EPJ Web of Conferences, 2012
We present active galactic nuclei (AGNs) that have shown extreme amplitude variability in X-rays. These AGN appear as bright for long periods, but then suddenly become extremely X-ray weak sources.
Gallo L.C., Leighly K.M., Komossa S., Grupe D.   +3 more
doaj   +1 more source

BALNet: Deep-learning-based Detection and Measurement of Broad Absorption Lines in Quasar Spectra

The Astrophysical Journal Supplement Series
Broad absorption line (BAL) quasars serve as critical probes for understanding outflows from active galactic nuclei, black hole accretion, and cosmic evolution.
Yangyang Li, Zhijian Luo, Shaohua Zhang, Du Wang, Jianzhen Chen, Zhu Chen, Hubing Xiao, Chenggang Shu   +7 more
doaj   +1 more source