Results 31 to 40 of about 1,277,615 (347)

Powerful Jets from Radiatively Efficient Disks, a Decades-Old Unresolved Problem in High Energy Astrophysics

open access: yesGalaxies, 2021
The discovery of 3C 273 in 1963, and the emergence of the Kerr solution shortly thereafter, precipitated the current era in astrophysics focused on using black holes to explain active galactic nuclei (AGN).
Chandra B. Singh   +2 more
doaj   +1 more source

BAT AGN spectroscopic survey - XV: the high frequency radio cores of ultra-hard X-ray selected AGN [PDF]

open access: yes, 2020
We have conducted 22 GHz radio imaging at 1 arcsec resolution of 100 low-redshift AGN selected at 14–195 keV by the Swift-BAT. We find a radio core detection fraction of 96 per cent, much higher than lower frequency radio surveys.
Baek, Junhyun   +16 more
core   +2 more sources

Radio Jets in Young Stellar Objects with the SKA [PDF]

open access: yes, 2014
Jets are ubiquitous in the star-forming process since accretion is intimately associated with outflow. Weak free-free continuum emission in the centimeter domain is associated with these jets.
G. Anglada   +2 more
semanticscholar   +1 more source

Broadband VLA Spectral-line Survey of a Sample of Ionized Jet Candidates

open access: yesThe Astrophysical Journal Supplement Series, 2023
The study of the interaction between ionized jets, molecular outflows, and their environments is critical to understanding high-mass star formation, especially because jets and outflows are thought to be key in the transfer of angular momentum outward ...
E. Sanchez-Tovar   +4 more
doaj   +1 more source

Effect of Expansion and Magnetic Field Configuration on Mass Entrainment of Jets [PDF]

open access: yes, 1999
We investigate the growth of jet plus entrained mass in simulations of supermagnetosonic cylindrical and expanding jets. The entrained mass spatially grows in three stages: from an initially slow spatial rate to a faster rate and finally at a flatter ...
A. Rosen   +14 more
core   +3 more sources

Shocks in relativistic transverse stratified jets, a new paradigm for radio-loud AGN [PDF]

open access: yes, 2017
The transverse stratification of active galactic nuclei (AGN) jets is suggested by observations and theoretical arguments, as a consequence of intrinsic properties of the central engine (accretion disc + black hole) and external medium. On the other hand,
O. Hervet   +6 more
semanticscholar   +1 more source

Empirical Determinations of Key Physical Parameters Related to Classical Double Radio Sources [PDF]

open access: yes, 1998
Multi-frequency radio observations of the radio bridge of powerful classical double radio sources can be used to determine: the beam power of the jets emanating from the AGN; the total time the source will actively produce jets that power large-scale ...
Daly, Ruth A.   +2 more
core   +3 more sources

The influence of circumnuclear environment on the radio emission from TDE jets [PDF]

open access: yes, 2016
Dozens of stellar tidal disruption events (TDEs) have been identified at optical, UV and X-ray wavelengths. A small fraction of these, most notably Swift J1644+57, produce radio synchrotron emission, consistent with a powerful, relativistic jet shocking ...
A. Generozov   +5 more
semanticscholar   +1 more source

A Panchromatic View of Relativistic Jets in Narrow-Line Seyfert 1 Galaxies

open access: yesGalaxies, 2016
The discovery by the Large Area Telescope on board Fermi of variable γ-ray emission from radio-loud narrow-line Seyfert 1 (NLSy1) galaxies revealed the presence of a possible third class of Active Galactic Nuclei (AGN) with relativistic jets in addition ...
Filippo D’Ammando   +5 more
doaj   +1 more source

Relativistic superluminal radio jets in microquasars in our galaxy [PDF]

open access: yes, 2006
We discuss the origin of superluminal radio jets in Black hole X-ray binaries with relativistic radio jets in our Galaxy popularly known as microquasars.
Yadav, J S
core   +2 more sources

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