Results 21 to 30 of about 26,905 (172)
"Normal" FRII Radio Galaxies as a Probe of the Nature of X-Shaped Radio Sources [PDF]
Monthly Notices of the Royal Astronomical Society, 2008 We present a multiwavelength radio study of a sample of nearby Fanaroff-Riley class II (FRII) radio galaxies, matched with the sample of known X-shaped radio sources in size, morphological properties and redshift, using new Giant Metrewave Radio Telescope (GMRT) data and archival data from the Very Large Array (VLA).
Lal, Dharam Vir +2 more
openaire +3 more sources
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.
Springmann, Alessondra +1 more
openaire +2 more sources
Discovery of X-shaped morphology of the giant radio galaxy 0503-286
Astronomy & Astrophysics, 2022 The high surface-brightness sensitivity of the galactic and extragalactic all-sky mwa survey (GLEAM) image of the giant radio galaxy (GRG) 0503-28 at 70–230 MHz has revealed an inversion-symmetric bending of its two lobes, while maintaining a ∼200 kpc wide strip-like radio emission gap between their bent portions.
Dabhade, Pratik, Krishna, Gopal
openaire +4 more sources
The X-shaped Radio Galaxy J0725+5835 is Associated with an AGN Pair
The Astrophysical Journal, 2022 Abstract X-shaped radio galaxies (XRGs) are those that exhibit two pairs of unaligned radio lobes (main radio lobes and wings). One of the promising models for the peculiar morphology is jet reorientation. To clarify this, we conducted a 5 GHz observation with the European VLBI Network (EVN) of XRG J0725+5835, which resembles the ...
Xiaolong Yang +8 more
openaire +2 more sources
X-shaped Radio Galaxies: Optical Properties, Large-scale Environment, and Relationship to Radio Structure [PDF]
The Astrophysical Journal, 2019 Abstract In pursuit of clues to the origin of “winged” or X-shaped radio galaxies (XRGs) we investigate the parent galaxies of a large sample of 106 XRGs for optical–radio axes alignment, interstellar medium, black hole mass, and large-scale environment.
Ravi Joshi +11 more
openaire +2 more sources
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 ...
David H. Roberts +2 more
openaire +1 more source
Modelling X-shaped radio galaxies: Dynamical and emission signatures from the Back-flow model
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 +5 more
openaire +2 more sources
X-shaped radio galaxy 3C 223.1: A ‘double boomerang’ with an anomalous spectral gradient
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
null Gopal Krishna, Pratik Dabhade
openaire +2 more sources
The Astrophysical Journal Letters, 2022 Abstract X-shaped radio galaxies (XRGs) produce misaligned X-shaped jet pairs and make up ≲10% of radio galaxies. XRGs are thought to emerge in galaxies featuring a binary supermassive black hole (SMBH), SMBH merger, or large-scale ambient medium asymmetry.
Aretaios Lalakos +8 more
openaire +2 more sources
GMRT Low-frequency Imaging of an Extended Sample of X-shaped Radio Galaxies [PDF]
The Astronomical Journal, 2019 Abstract We present a low-frequency imaging study of an extended sample of X-shaped radio sources using the Giant Metrewave Radio Telescope (GMRT) at two frequencies (610 and 240 MHz). The sources were drawn from a Very Large Array Radio Images of the Sky at Twenty-Centimeters (FIRST) selected sample and extend an initial GMRT study at ...
Dharam V. Lal +3 more
openaire +2 more sources