Results 21 to 30 of about 96,122 (298)
A Panchromatic View of Relativistic Jets in Narrow-Line Seyfert 1 Galaxies
Galaxies, 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
A Chandra Survey of Quasar Jets: First Results
, 2004 We present results from Chandra X-ray imaging and spectroscopy of a flux-limited sample of flat spectrum radio-emitting quasars with jet-like extended structure. Twelve of twenty quasar jets are detected in 5 ks ACIS-S exposures.
D. A. Schwartz +11 more
core +1 more source
Constraining the parameters of the putative supermassive binary black hole in PG 1302-102 from its radio structure [PDF]
, 2015 We investigate the pc-scale kinematics and kpc-scale radio morphology of the quasar PG 1302-102, which may harbour a sub-pc separation supermassive binary black hole system at its centre as inferred from optical variability.
Britzen, S. +6 more
core +7 more sources
A survey of extended radio jets with Chandra and HST
, 2004 We present the results from an X-ray and optical survey of a sample of 17 radio jets in AGN performed with Chandra and HST. The sample was selected from the radio and is unbiased toward detection at shorter wavelengths, but preferentially it includes ...
Akujor C. E. +16 more
core +1 more source
Empirical Determinations of Key Physical Parameters Related to Classical Double Radio Sources [PDF]
, 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
An Old Fogey’s History of Radio Jets
Galaxies, 2017 This paper describes a personal view of the discovery of radio jets in celestial radio sources. The existence of narrow, collimated optical features in distant objects has been known about since the early 20th century; however, the advent of radio ...
Ralph Spencer
doaj +1 more source
Plasma physics in clusters of galaxies [PDF]
, 2003 Clusters of galaxies are the largest self-gravitating structures in the universe. Each cluster is filled with a large-scale plasma atmosphere, in which primordial matter is mixed with matter that has been processed inside stars.
Appl S. +3 more
core +2 more sources
The energy distribution of electrons in radio jets [PDF]
, 2017 Black-hole and neutron-star X-ray binaries exhibit compact radio jets, when they are in the so called quiescent, hard, or hard intermediate states. The radio spectrum in these states is flat to slightly inverted.
Kylafis, Nikolaos D. +1 more
core +1 more source
Relativistic jets in narrow-line Seyfert 1 galaxies. New discoveries and open questions
EPJ Web of Conferences, 2013 Before the launch of the Fermi satellite only two classes of AGNs were known to produce relativistic jets and thus emit up to the γ-ray energy range: blazars and radio galaxies, both hosted in giant elliptical galaxies.
D’Ammando F. +4 more
doaj +1 more source
The Astrophysical Journal Letters, 2023 Only a tiny fraction ∼1% of stellar tidal disruption events (TDEs) generate powerful relativistic jets evidenced by luminous hard X-ray and radio emissions.
Odelia Teboul, Brian D. Metzger
doaj +1 more source