Results 31 to 40 of about 93,893 (293)
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
VLBA Imaging of NGC 4261: Symmetric Parsec-scale Jets and the Inner Accretion Region [PDF]
, 1997 We observed the nuclear region of NGC 4261 (3C270) with the VLBA at two frequencies (1.6 and 8.4 GHz) simultaneously. We find that the position angle of the parsec-scale radio axis agrees, within the errors, with the position angle of the VLA-scale jet ...
Ann E. Wehrle +4 more
core +3 more sources
Interaction of jets with the ISM of radio galaxies [PDF]
Astrophysics and Space Science, 2007 We present three dimensional simulations of the interaction of a light hypersonic jet with an inhomogeneous thermal and turbulently supported disk in an elliptical galaxy, including Radio and multi-band X-ray visualisations. These simulations are applicable to the GPS/CSS phase of some extragalactic radio sources. We identify four generic phases in the
Sutherland, Ralph, Bicknell, Geoffrey
openaire +3 more sources
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
Symposium - International Astronomical Union, 1997 Since thermal radio jets can be observed with subarsecond angular resolution and are unaffected by dust absorption, they provide a useful tool to study collimated outflows very close to the young stars that produce them. Here, I review recent results on this area, giving emphasis to the study of thermal jets in the case of the quadrupolar outflows in ...
openaire +1 more source
A STUDY OF RADIO POLARIZATION IN PROTOSTELLAR JETS [PDF]
The Astrophysical Journal, 2016 ABSTRACT Synchrotron radiation is commonly observed in connection with shocks of different velocities, ranging from relativistic shocks associated with active galactic nuclei, gamma-ray bursts, or microquasars, to weakly or non-relativistic flows such as those observed in supernova remnants. Recent observations of synchrotron emission in
Mariana Cécere +6 more
openaire +2 more sources
Radio jet interactions in the radio galaxy PKS 2152—699 [PDF]
Monthly Notices of the Royal Astronomical Society, 1998 We present radio observations of the radio galaxy PKS 2152-699 obtained with the Australia Telescope Compact Array (ATCA). The much higher resolution and s/n of the new radio maps reveals the presence of a bright radio component about 10 arcsec NE of the nucleus.
Fosbury, R. A. E. +5 more
openaire +2 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
First detection of thermal radio jets in a sample of proto-brown dwarf candidates [PDF]
, 2015 We observed with the JVLA at 3.6 and 1.3 cm a sample of 11 proto-brown dwarf candidates in Taurus in a search for thermal radio jets driven by the most embedded brown dwarfs.
Barrado, D. +12 more
core +2 more sources
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