The Unusual Active Galaxy H1821+643 and the Elusive Nature of FRI Quasars [PDF]
Publications of the Astronomical Society of the Pacific, 2022 The moderate spin estimate for the black hole at the center of the cool core cluster H1821+643 motivates the completion of a story about this object’s origin and evolution that was in the making since the work by Blundell & Rawlings over two decades ago ...
D. Garofalo, C. Singh
semanticscholar +1 more source
MeerKAT follow-up of enigmatic GLEAM 4-Jy (G4Jy) sources [PDF]
, 2022 We present the results from studying 140 radio sources in the GLEAM (GaLactic and Extragalactic All-sky MWA [Murchison Widefield Array]) 4-Jy (G4Jy) Sample.
Bester, Hertzog L. +6 more
core +2 more sources
Black hole masses and starbursts in X-shaped radio sources [PDF]
Astronomy & Astrophysics, Volume 527, A38 (2011), 2010 It has been suggested that the X-shaped morphology observed in some radio sources can reflect either a recent merger of two supermassive black holes (SMBHs) or the presence of a second active black hole in the galactic nucleus. These scenarios are tested by studying the relationship between the black hole mass, radio and optical luminosity, starburst ...
arxiv +1 more source
3D Relativistic MHD numerical simulations of X-shaped radio sources [PDF]
A&A 606, A57 (2017), 2017 A significant fraction of extended radio sources presents a peculiar X-shaped radio morphology: in addition to the classical double lobed structure, radio emission is also observed along a second axis of simmetry in the form of diffuse wings or tails. In a previous investigation we showed the existence of a connection between the radio morphology and ...
arxiv +1 more source
Is jet re-orientation the elusive trigger for star formation suppression in radio galaxies? [PDF]
, 2022 Jet re-orientation associated with the time evolution of radio quasars explains the formation of X-shaped radio galaxies and their preference for isolated environments. But since X-shaped radio galaxies are generally not found in dense environments (e.g.
arxiv +1 more source
“Winged” Radio Sources from the LOFAR Two-meter Sky Survey First Data Release (LoTSS DR1)
Astrophysical Journal Supplement Series, 2022 A small number of extragalactic radio sources disclose a pair of low-surface-brightness radio lobes, known as “wings,” aligned at a certain angle to the primary jets. Such exotic sources are known as “winged” radio sources.
Soumendra Bera +3 more
semanticscholar +1 more source
Surface brightness discontinuities in radio halos. Insights from the MeerKAT Galaxy Cluster Legacy Survey [PDF]
, 2023 Dynamical motions in the ICM can imprint distinctive features on the X-ray images that map the thermal emission from clusters, such as sharp surface brightness discontinuities due to shocks and cold fronts.
Botteon, Andrea +4 more
core +3 more sources
A Chandra Study of the Radio Galaxy NGC 326: Wings, Outburst History, and AGN Feedback [PDF]
, 2011 NGC 326 is one of the most prominent X- or Z-shaped radio galaxies (XRGs/ZRGs) and has been the subject of several studies attempting to explain its morphology through either fluid motions or reorientation of the jet axis.
Antonuccio-Delogu +33 more
core +1 more source
FIRST winged radio galaxies with X and Z symmetry [PDF]
2020, ApJS, 251, 9, 2020 X-shaped radio galaxies are a subclass of radio sources that exhibit a pair of secondary low surface brightness radio lobes oriented at an angle to the primary high surface brightness lobes. Sometimes, the secondary low brightened lobes emerge from the edges of the primary high brightened lobes and form a Z-symmetric morphology.
arxiv +1 more source
Weak-lensing Analysis of the Complex Cluster Merger A746 with Subaru/Hyper Suprime-Cam
The Astrophysical JournalThe galaxy cluster A746 ( z = 0.214), featuring a double radio relic system, two isolated radio relics, a possible radio halo, disturbed V-shaped X-ray emission, and intricate galaxy distributions, is a unique and complex merging system.
K. HyeongHan +17 more
doaj +1 more source