Results 101 to 110 of about 796,792 (175)
Investigating the Emission Mechanism in the Spatially Resolved Jets of Two z ≈ 3 Radio-loud Quasars
The Astrophysical JournalThis study focuses on high-redshift, z > 3, quasars where resolved X-ray jets remain underexplored in comparison to nearby sources. Building upon previous work, we identify and confirm extended kiloparsec-scale jets emission in two quasars (J1405+0415, z
Jaya Maithil +11 more
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UniverseHigh-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 +7 more
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Properties of radio-loud quasars in the Sloan Digital Sky Survey
, 2019 We present a study of a sample of 223 radio-loud quasars (up to redshift < 0.3) in order to investigate their spectral properties. Twenty-six of these radio-loud quasars are identified as flat-spectrum radio quasars (FSRQs), and 54 are identified as ...
H. Guo, H. Gaur, S. Ramya, M. Gu
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The Astrophysical JournalWe present the first study dedicated to measuring the timescales for black hole accretion and jet launching in a quasar at the edge of reionization, PSO J352.4034–15.3373 at z = 5.832 ± 0.001.
Sofía Rojas-Ruiz +10 more
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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
High-Redshift, Radio-Loud Quasars
, 2000 I discuss two programs to study radio-loud quasars at high (z>4) redshift. Quasars are the most luminous, non-transient objects known and are observed to the earliest cosmic epochs. At lower redshifts, radio-loud quasars are associated with host galaxies having deVaucoleurs profiles. By association, identifying and studying a sample of high-redshift,
openaire +2 more sources
Broad Absorption Line Quasars and the Radio‐Loud/Radio‐Quiet Dichotomy [PDF]
Publications of the Astronomical Society of the Pacific, 1999 The observation that the extremely broad, blueshifted absorption troughs which characterize broad absorption line quasars (BALQs) occur exclusively in radio-quiet quasars (RQQs) suggests that this class of active galactic nuclei (AGN) may offer important clues to the radio-loud/radio-quiet (RL/RQ) dichotomy in quasars.
openaire +2 more sources
Monster Radio Jet (>66 kpc) Observed in Quasar at z ∼ 5
The Astrophysical Journal LettersWe 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 +8 more
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The jet power, radio loudness, and black hole mass in radio-loud active galactic nuclei
, 2006 Jet formation is thought to be closely connected with the mass of the central supermassive black hole in active galactic nuclei. The radio luminosity commonly used in investigating this issue is merely an indirect measure of the energy transported ...
Liu, Y, Gu, MF, Jiang, DR
core
The Astrophysical JournalBased 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
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