Simulations of Precessing Jets and the Formation of X-shaped Radio Galaxies
The Astrophysical Journal, 2023 Jet precession is sometimes invoked to explain asymmetries in radio galaxy (RG) jets and “X/S/Z-shaped” RGs, caused by the presence of a binary black hole companion to the source active galactic nucleus or by accretion instabilities.
Chris Nolting, Jay Ball, Tri M. Nguyen
doaj +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.
Springmann, Alessondra +1 more
core +4 more sources
X-shaped radio galaxies and the nanohertz gravitational wave background [PDF]
Proceedings of the International Astronomical Union, 2015 Coalescence of Supermassive Black Holes (SMBHs) in galaxy mergers is potentially the dominant contributor to the low frequency Gravitational Wave Background (GWB).
Roberts, David H. +2 more
core +2 more sources
Starbursts and black hole masses in X-shaped radio galaxies: Signatures of a merger event? [PDF]
Astronomy & Astrophysics, 2012 We present new spectroscopic identifications of 12 X-shaped radio galaxies and use the spectral data to derive starburst histories and masses of the nuclear supermassive black holes in these galaxies.
Vahram Chavushyan
core +6 more sources
The origin of X-shaped radio galaxies : clues from the Z-symmetric secondary lobes [PDF]
The Astrophysical Journal, 2003 Existing radio images of a few X-shaped radio galaxies reveal Z-symmetric morphologies in their weaker secondary lobes that cannot be naturally explained by either the galactic merger or radio-lobe backflow scenarios, the two dominant models for these X ...
Gopal-Krishna, G. +5 more
core +3 more sources
Origin of the Double-peaked Narrow Emission Lines in the Optical Spectra of X-shaped Radio Galaxies
The Astrophysical JournalWe investigate X-shaped radio galaxies (XRGs) with optical double-peaked narrow emission lines (DPNELs) as potential hosts of dual or binary supermassive black holes (SMBHs).
Ghosh Prajnadipt +15 more
doaj +3 more sources
X-shaped radio galaxies as observational evidence for the interaction of supermassive binary black holes and accretion disc at parsec scale [PDF]
Monthly Notices of the Royal Astronomical Society, 2004 In the hierarchical galaxy formation model, today's galaxies are the product of frequent galaxy merging, triggering the activity of active galactic nuclei and forming a supermassive black hole binary. A binary may become stalling at the parsec scale
Liu, FK
core +3 more sources
The optical spectra of X-shaped radio galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2010 X-shaped radio galaxies are defined by their peculiar large-scale radio morphology. In addition to the classical double-lobed structure they have a pair of low-luminosity wings that straddles the nucleus at almost right angles to the active lobes, thus giving the impression of an 'X'.
Landt, Hermine +2 more
openaire +3 more sources
The Chandra View of Nearby X-shaped Radio Galaxies [PDF]
The Astrophysical Journal, 2009 65 pages in pre-print form incl. 9 figures (multi-page), 7 tables, and notes.
Hodges-Kluck, Edmund +3 more
openaire +3 more sources
On the origin of X-shaped radio galaxies [PDF]
Research in Astronomy and Astrophysics, 2012 After a brief, critical review of the leading explanations proposed for the small but important subset of radio galaxies showing an X-shaped morphology (XRGs) we propose a generalized model, based on the jet-shell interaction and spin-flip hypotheses. The most popular scenarios for this intriguing phenomenon invoke either hydrodynamical backflows and ...
Gopal-Krishna +3 more
openaire +2 more sources