Results 21 to 30 of about 25,768 (176)

X-shaped radio galaxy 3C 223.1: A ‘double boomerang’ with an anomalous spectral gradient [PDF]

Astronomy & Astrophysics, 2022
A comparison of the recent LOFAR 144 MHz map of the radio source 3C 223.1 (J094124.028+394441.95) with the VLA maps at 4.9 GHz and 8.3 GHz that we built based on archival data, establishes this X-shaped radio galaxy (XRG) as a singularly robust case where the ‘wings’ exhibit a distinctly flatter radio spectrum than the primary lobes. The details of its
Gopal Krishna, Pratik Dabhade
openalex   +3 more sources

A Unified Framework for X-shaped Radio Galaxies [PDF]

The Astrophysical Journal, 2020
Abstract We propose a radically different picture for X-shaped radio galaxies compared with existing models as transition objects between cold-mode accreting, low-spinning retrograde black holes and low-spinning prograde black holes. This model explains their smaller average black hole masses; their general aversion for cluster compared ...
David Garofalo, Ravi Joshi, Xiaolong Yang, Chandra B. Singh, Max M. North, Matthew J. Hopkins   +5 more
openalex   +4 more sources

Modelling X-shaped radio galaxies: Dynamical and emission signatures from the Back-flow model [PDF]

Astronomy & Astrophysics, 2022
Context. Active galactic nuclei typically show the presence of radio jets ranging from sub-kiloparsec to megaparsec scales. Some of these radio galaxies show distortion in their jets, forming tailed or winged sources. X-shaped radio galaxies (XRGs) are a sub-class of winged sources, the formation mechanism of which is still unclear. Aims.
Gourab Giri, Bhargav Vaidya, P. Rossi, G. Bodo, Dipanjan Mukherjee, A. Mignone   +5 more
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Host Galaxies of X-Shaped Radio Sources [PDF]

, 2006
The majority of radiation from galaxies containing active galactic nuclei (AGNs) is emitted not by the stars composing the galaxy, but from an active source at the galactic center, most likely a supermassive black hole. Of particular interest are radio galaxies, the active galaxies emitting much of their radiation at radio wavelengths.
Alessondra Springmann
openalex   +4 more sources

Spectral index variation across X-shaped radio galaxies [PDF]

, 2023
20 pages, 2 figures, 2 tables, accepted for publication in ...
Dusmanta Patra, Ravi Joshi, Gopal‐Krishna   +2 more
  +6 more sources

Multifrequency JVLA observations of the X-shaped radio galaxy in Abell 3670 [PDF]

Astronomy & Astrophysics, 2019
Context.X-shaped radio galaxies (XRGs) exhibit a pair of bright primary lobes and a pair of weak secondary lobes (“wings”), which are oriented with an angle that gives the structure a cross-like shape. Though several theoretical models have been proposed to explain their origin, there is currently not a general consensus on a formation scenario.Aims.We
L. Bruno, Myriam Gitti, A. Zanichelli, L. Gregorini   +3 more
openalex   +6 more sources

Hydrodynamical backflow in X-shaped radio galaxy PKS 2014−55 [PDF]

Monthly Notices of the Royal Astronomical Society, 2020
ABSTRACT We present MeerKAT 1.28 GHz total-intensity, polarization, and spectral-index images covering the giant (projected length l ≈ 1.57 Mpc) X-shaped radio source PKS 2014−55 with an unprecedented combination of brightness sensitivity and angular resolution.
W. D. Cotton, K. Thorat, J. J. Condon, B. S. Frank, G I G Józsa, S. V. White, Roger Deane, Nadeem Oozeer, Marcellin Atemkeng, Hertzog L. Bester, B. L. Fanaroff, R S Kupa, O. Smirnov, T. Mauch, V. Krishnan, F. Camilo   +15 more
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Origin of X-shaped radio-sources: further insights from the properties of their host galaxies [PDF]

Astronomy & Astrophysics, 2015
Accepted for publication in A& ...
M. Gillone, A. Capetti, P. Rossi
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THECHANDRAVIEW OF NEARBY $\mathsf {X}$-SHAPED RADIO GALAXIES [PDF]

The Astrophysical Journal, 2010
65 pages in pre-print form incl. 9 figures (multi-page), 7 tables, and notes.
Edmund Hodges‐Kluck, C. S. Reynolds, C. C. Cheung, M. Coleman Miller   +3 more
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X-Shaped Radio Galaxies and the Nanohertz Gravitational Wave Background [PDF]

Proceedings of the International Astronomical Union, 2015
AbstractCoalescence of supermassive black holes (SMBHs) in galaxy mergers is potentially the dominant contributor to the low frequency gravitational wave background (GWB). It was proposed by Merritt & Ekers that X-shaped radio galaxies are signposts of such coalescences and that their abundance might be used to predict the magnitude of the GWB ...
D. H. Roberts, L. Saripalli, R. Subrahmanyan   +2 more
openalex   +3 more sources