NGC 326: X-shaped no more [PDF]
Monthly notices of the Royal Astronomical Society, 2019 We present new 144-MHz LOFAR observations of the prototypical `X-shaped' radio galaxy NGC 326, which show that the formerly known wings of the radio lobes extend smoothly into a large-scale, complex radio structure. We argue that this structure is most likely the result of hydrodynamical effects in an ongoing group or cluster merger, for which pre ...
Croston, J H +9 more
arxiv +11 more sources
A VLBA-uGMRT search for candidate binary black holes: Study of six X-shaped radio galaxies with double-peaked emission lines [PDF]
arXivIdentifying methods to discover dual AGN has proven to be challenging. Several indirect tracers have been explored in the literature, including X/S-shaped radio morphologies and double-peaked (DP) emission lines in the optical spectra. However, the detection rates of confirmed dual AGN candidates from the individual methods remain extremely small.
Biny Sebastian +8 more
arxiv +7 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 +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 +5 more
openalex +3 more sources
Spectral index variation across X-shaped radio galaxies [PDF]
, 2023 20 pages, 2 figures, 2 tables, accepted for publication in ...
Dusmanta Patra +2 more
+6 more sources
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
openalex +5 more sources
X-shaped radio galaxies: probing jet evolution, ambient medium dynamics, and their intricate interconnection [PDF]
Frontiers in Astronomy and Space SciencesThis review explores the field of X-shaped radio galaxies (XRGs), a distinctive subset of winged radio sources that are identified by two pairs of jetted lobes which aligned by a significant angle, resulting in an inversion-symmetric structure. These lobes, encompassing active (primary) and passive (secondary) phases, exhibit a diverse range of ...
Gourab Giri +4 more
+7 more sources
Deciphering the Morphological Origins of X-shaped Radio Galaxies: Numerical Modeling of Backflow versus Jet Reorientation [PDF]
The Astrophysical Journal Supplement Series, 2023 Abstract X-shaped radio galaxies (XRGs) develop when certain extragalactic jets deviate from their propagation path. An asymmetric ambient medium (backflow model) or complex active galactic nucleus activity (jet-reorientation model) enforcing the jet direction to deviate may cause these structures.
Gourab Giri +2 more
openalex +4 more sources
The genesis of morphologies in extended radio sources: X-shapes, off-axis distortions and giant radio sources [PDF]
Astrophys.J.695:156-170,2009, 2008 We examine relationships between the morphology in double radio sources and the radio-optical position angle offset--the relative orientation of the radio axis with respect to the major axis of the host galaxy. The study was done for a representative sample of radio sources: the nearby (redshift z < 0.5) 3CRR sources, and separately for samples of ...
L. Saripalli, R. Subrahmanyan
arxiv +3 more sources
CGCG 292-057 - a radio galaxy with merger-modulated radio activity [PDF]
, 2012 We announce the discovery of a unique combination of features in a radio source identified with the merger galaxy CGCG 292-057. The radio galaxy both exhibits a highly complex, X-like structure and shows signs of recurrent activity in the form of double ...
A. Kuźmicz +67 more
core +2 more sources