Results 111 to 120 of about 10,418 (177)

Diverse Molecular Gas Excitations in Quasar Host Galaxies at z ∼ 6

The Astrophysical Journal
We present observations using the Northern Extended Millimetre Array (NOEMA) of CO and H _2 O emission lines and the underlying dust continuum in two quasars at z ∼ 6, i.e., P215−16 at z = 5.78 and J1429+5447 at z = 6.18.
Jianan Li, Ran Wang, Antonio Pensabene, Fabian Walter, Bram P. Venemans, Roberto Decarli, Eduardo Bañados, Pierre Cox, Roberto Neri, Alain Omont, Zheng Cai, Yana Khusanova, Fuxiang Xu, Dominik Riechers, Jeff Wagg, Yali Shao, Yuanqi Liu, Karl M. Menten, Qiong Li, Xiaohui Fan   +19 more
doaj   +1 more source

High-Redshift Quasars at z ≥ 3—III: Parsec-Scale Jet Properties from Very Long Baseline Interferometry Observations

Universe
High-redshift active galactic nuclei (AGN) provide key insights into early supermassive black hole growth and cosmic evolution. This study investigates the parsec-scale properties of 86 radio-loud quasars at z ≥ 3 using very long baseline interferometry (
Shaoguang Guo, Tao An, Yuanqi Liu, Chuanzeng Liu, Zhijun Xu, Yulia Sotnikova, Timur Mufakharov, Ailing Wang   +7 more
doaj   +1 more source

Evidence for quasar fast outflows being accelerated at the scale of tens of parsecs. [PDF]

Sci Adv, 2022
He Z, Liu G, Wang T, Mou G, Green R, Bian W, Wang H, Ho LC, Sun M, Shen L, Arav N, Chen C, Wu Q, Guo H, Lin Z, Li J, Yi W.   +16 more
europepmc   +1 more source

Red companions to a z=2.15 radio-loud quasar [PDF]

Monthly Notices of the Royal Astronomical Society, 2000
We have conducted observations of the environment around the z=2.15 radio loud quasar 1550-269 in search of distant galaxies associated either with it or the z=2.09 CIV absorber along its line of sight. Such objects will be distinguished by their red colours, R-K>4.5.
openaire   +2 more sources

Monster Radio Jet (>66 kpc) Observed in Quasar at z ∼​​​​​ 5

The Astrophysical Journal Letters
We present the discovery of a large extended radio jet associated with the extremely radio-loud quasar J1601+3102 at z  ∼​​​​​ 5 from subarcsecond resolution imaging at 144 MHz with the International LOFAR Telescope.
Anniek J. Gloudemans, Frits Sweijen, Leah K. Morabito, Emanuele Paolo Farina, Kenneth J. Duncan, Yuichi Harikane, Huub J. A. Röttgering, Aayush Saxena, Jan-Torge Schindler   +8 more
doaj   +1 more source

Do All the Quasars and High-excitation Radio Galaxies (HERGs) in the 3CRR Catalog Contain a Magnetically Arrested Disk (MAD)?

The Astrophysical Journal
Based on the magnetization, an accretion disk with a large-scale magnetic field can be separated into either standard and normal evolution or magnetically arrested disk (MAD), which are difficult to identify from observations. It is still unclear whether
Shuang-Liang Li, Wenwen Zuo, Xinwu Cao
doaj   +1 more source

Soft gamma rays from low accreting supermassive black holes and connection to energetic neutrinos. [PDF]

Nat Commun, 2021
Kimura SS, Murase K, Mészáros P.
europepmc   +1 more source

X‐Ray Spectra of Intermediate‐Luminosity, Radio‐loud Quasars

The Astrophysical Journal, 2002
To appear in ApJ, v.575, Aug 10, 2002. 14 pages, including 3 tables and 6 figures.
Hasenkopf, Christa, Sambruna, Rita, Eracleous, Mike   +2 more
openaire   +2 more sources

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

The Hosts Galaxies of Radio-Loud and Radio-Quiet Quasars

, 2001
Latex, 10 pages, including 6 postscript figures.
openaire   +2 more sources