A unified framework for X-shaped radio galaxies

Abstract

We propose a radically different picture for X-shaped radio galaxies compared to existing models as transition objects between cold mode accreting low spinning retrograde black holes and low spinning prograde black holes. The model explains their smaller average black hole masses, their general aversion for cluster compared to isolated environments, the negligible difference in spectral index between primary and secondary jets despite a time difference in their formation, their absence among the most powerful radio quasars and radio galaxies, and their connection to the elusive FRI quasar class, among others. The key to their formation is cold gas accretion onto Schwarzschild black holes.

arXiv comment15 pages, 8 figures, Accepted for publication in the Astrophysical Journal

References in corpus (26)

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Cited by in corpus (11)

• Modelling X-shaped Radio Galaxies: Dynamical and Emission Signatures from the Back-flow model
• Why radio quiet quasars are preferred over radio loud quasars regardless of environment and redshift
• Evidence for radio loud to radio quiet evolution from red and blue quasars
• Is jet re-orientation the elusive trigger for star formation suppression in radio galaxies?
• A Morphological Identification and Study of Radio Galaxies from LoTSS DR2. I. The "Winged'' Radio Galaxies
• Characteristics of Powerful Radio Galaxies
• Peculiar black hole accretion rates in AGN with highest star formation rates in the universe
• Cool-core, X-ray cavities and cold front revealed in RXCJ0352.9+1941 cluster by Chandra and GMRT observations
• The black hole-star formation connection over cosmic time
• A Critical Eddington Ratio for X-Shaped Radio Galaxies
• The unusual active galaxy H1821+643 and the elusive nature of FRI quasars