Results 111 to 120 of about 796,792 (175)

Electromagnetic counterparts to massive black-hole mergers. [PDF]

Living Rev Relativ, 2022
Bogdanović T, Miller MC, Blecha L.
europepmc   +1 more source

The 7C Redshift Survey - understanding radio-loud quasars and radio galaxies

, 1999
Orientation-based unified schemes for radio-loud quasars and radio galaxies are discussed in the light of a new complete sample of identified radio sources - the 7C Redshift Survey.
Blundell, Katherine, Blundell, KM, Willott, CJ, Rawlings, S   +3 more
core  

Circumgalactic Environments Around Distant Quasars 3C 9 and 4C 05.84

The Astrophysical Journal
We present results from the Quasar hosts Unveiled by high Angular Resolution Techniques survey studying the circumgalactic medium (CGM) by observing rest-frame UV emission lines Ly α , C iv , and He ii around two radio-loud quasars, 3C 9 ( z = 2.02) and ...
Sanchit Sabhlok, Shelley A. Wright, Andrey Vayner, Sonata Simonaitis-Boyd, Norman Murray, Lee Armus, Maren Cosens, James Wiley, Mariska Kriek   +8 more
doaj   +1 more source

Probing the nature of black holes: Deep in the mHz gravitational-wave sky. [PDF]

Exp Astron (Dordr), 2021
Baibhav V, Barack L, Berti E, Bonga B, Brito R, Cardoso V, Compère G, Das S, Doneva D, Garcia-Bellido J, Heisenberg L, Hughes SA, Isi M, Jani K, Kavanagh C, Lukes-Gerakopoulos G, Mueller G, Pani P, Petiteau A, Rajendran S, Sotiriou TP, Stergioulas N, Taylor A, Vagenas E, van de Meent M, Warburton N, Wardell B, Witzany V, Zimmerman A.   +28 more
europepmc   +1 more source

The Two-component Circumgalactic Medium Emission around z ∼ 2 Radio-loud Quasars

The Astrophysical Journal
We present Ly α , He ii , and C iv observations of seven z ∼ 2 radio-loud quasars observed using the Keck Cosmic Web Imager and compare it to observed radio jet emission using archival Very Large Array and Atacama Large Millimeter/submillimeter Array ...
Sanchit Sabhlok, Shelley A. Wright, Andrey Vayner, Norman Murray, Lee Armus, Maren Cosens, James Wiley, Eileen Meyer, Karthik Reddy, Marie Wingyee Lau   +9 more
doaj   +1 more source

Evolving parsec-scale radio structure in the most distant blazar known. [PDF]

Nat Commun, 2020
An T, Mohan P, Zhang Y, Frey S, Yang J, Gabányi KÉ, Gurvits LI, Paragi Z, Perger K, Zheng Z.   +9 more
europepmc   +1 more source

B2 1308+326: A Changing-look Blazar or Not?

The Astrophysical Journal
In our previous study, we identified a shift in the synchrotron peak frequency of the blazar B2 1308+326 from 10 ^12.9 to 10 ^14.8 Hz during a flare, suggesting it could be a changing-look blazar (CLB).
Ashwani Pandey, Chen Hu, Jian-Min Wang, Bożena Czerny, Yong-Jie Chen, Yu-Yang Songsheng, Yi-Lin Wang, Hao Zhang, Jesús Aceituno   +8 more
doaj   +1 more source

Photometric Selection of Type 1 Quasars in the XMM-LSS Field with Machine Learning and the Disk–Corona Connection

The Astrophysical Journal
We present photometric selection of type 1 quasars in the ≈5.3 deg ^2 XMM-Large Scale Structure survey field with machine learning. We constructed our training and blind-test samples using spectroscopically identified Sloan Digital Sky Survey quasars ...
Jian Huang, Bin Luo, W. N. Brandt, Ying Chen, Qingling Ni, Yongquan Xue, Zijian Zhang   +6 more
doaj   +1 more source

Optical Spectral Properties of Radio Loud Quasars along the Main Sequence

, 2019
 We present the optical properties of Radio-Loud quasars along the Main Sequence (MS) of quasars. A sample of 355 quasars selected on the basis of radio detection was obtained by cross-matching the FIRST survey at 20cm and the SDSS DR12 spectroscopic ...
Edi Bon, Edi Bon (8169750), Natasa Bon (8169753), Ascension del Olmo (8169738), Alenka C. Negrete, Valerio Ganci, Valerio Ganci (8169744), Paola Marziani (8169741), Alenka C. Negrete (8169756), Ascension del Olmo, Natasa Bon, Mauro D'Onofrio, Paola Marziani, Mauro D'Onofrio (8169747)   +13 more
core   +1 more source

Milliarcsecond-resolution Radio-imaging Survey of Blazar Candidates at 4 < z < 5.4

The Astrophysical Journal Supplement Series
We present a milliarcsecond-resolution radio survey of 17 high-redshift (4 ≤ z ≤ 5.4) blazar candidates observed with the European Very Long Baseline Interferometry (VLBI) Network at 5 GHz.
Máté Krezinger, Alessandro Caccianiga, Daniele Dallacasa, Luca Ighina, Sándor Frey, Alberto Moretti, Sonia Antón, Silvia Belladitta, Claudia Cicone, Krisztina É. Gabányi, M. J. M. Marchã, Krisztina Perger   +11 more
doaj   +1 more source