Results 1 to 10 of about 1,242,014 (263)
Optical Observations of Radio Jets [PDF]
Highlights of Astronomy, 1980 Over the past several years a considerable body of evidence has accumulated, suggesting that extended radio sources are powered quasi-continuously from the nuclei of their parent galaxies. This view is supported by the recent discovery that several radio galaxies have narrow radio jets which connect their active nuclei with the large radio lobes and ...
Butcher, H.R. +2 more
semanticscholar +7 more sources
Radio jet precession in M 81* [PDF]
Astronomy & Astrophysics, 2023 We report four novel position angle measurements of the core region M 81* at 5 GHz and 8 GHz, which confirm the presence of sinusoidal jet precession in the M 81 jet region, as suggested by Martí-Vidal et al. (2011, A&A, 533, A111). The model makes three testable predictions regarding the evolution of the jet precession, which we test in our data ...
S. D. von Fellenberg +7 more
openaire +2 more sources
Astronomy & Astrophysics, 2023 Context.The local radio-loud AGN population is dominated by compact sources named FR0s. These sources show features, for example the host type, the mass of the supermassive black hole (SMBH), and the multi-band nuclear characteristics, that are similar to those of FRI radio galaxies.
G. Giovannini +4 more
openaire +4 more sources
Symposium - International Astronomical Union, 1984 Models are here presented interpreting the arcsecond radio structure found in the quasar 3C418 as a precessing jet. No simple solution exists and it has been found necessary to complicate the model geometry by allowing the precession cone-angle to increase with time.
T.W.B. Muxlow, M. Jullian, R. Linfield
openaire +1 more source
Symposium - International Astronomical Union, 1982 Most radio sources are two-sided, like Cygnus A. A minority, however, are one-sided, and the first-known and brightest example is 3C273 (see Fig. 1), a high-luminosity QSO, showing ‘super-luminal’ proper motions in the core. The explanation of such one-sided sources may follow one of two lines (and it seems that both schools of thought are represented ...
openaire +2 more sources
The Astronomical Journal, 1992 High-sensitivity VLA observations of M51 at 6 cm wavelength with sub-arcsecond resolution have resolved the southern extra-nuclear cloud identified by Ford et al. [ApJ, 293, 132 (1985)]. These observations reveal a short (3-4"), sinuous jetlike feature connecting the weak nuclear radio source to a bright arcuate ridge of radio emission that dominates ...
Jm Vanderhulst, Pc Crane
openaire +3 more sources
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 +2 more sources
A dichotomy in radio jet orientations [PDF]
New Astronomy Reviews, 2006 4pages, submitted to "QSO Hosts: Evolution and Environment", P.D. Barthel, D.B. Sanders, eds., August 2005, New Astr. Rev. Detailed description of analysis available in 2005 A&A 435,43 (astro-ph/0502075)
P. T. de Zeeuw, Gijsbert Verdoes Kleijn
openaire +3 more sources
Radio jets: Properties, life and impact [PDF]
Proceedings of the International Astronomical Union, 2019 AbstractOur view of the properties of extragalactic radio jets and the impact they have on the host galaxy has expanded in the recent years. This has been possible thanks to the data from new or upgraded radio telescopes. This review briefly summarises the current status of the field and describes some of the exciting recent results and the surprises ...
openaire +4 more sources
Radio Continuum Jet in NGC 7479 [PDF]
The Astrophysical Journal, 2008 The barred galaxy NGC 7479 hosts a remarkable jet-like radio continuum feature: bright, 12-kpc long in projection, and hosting an aligned magnetic field. The degree of polarization is 6%-8% along the jet, and remarkably constant, which is consistent with helical field models.
Laine, Seppo, Beck, Rainer
openaire +6 more sources