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The duty cycle of local radio galaxies


Shabala, SS and Ash, S and Alexander, P and Riley, JM, The duty cycle of local radio galaxies, Monthly Notices of the Royal Astronomical Society, 388, (2) pp. 625-637. ISSN 0035-8711 (2008) [Refereed Article]

DOI: doi:10.1111/j.1365-2966.2008.13459.x


We use a volume- and flux-limited sample of local (0.03 ¡Â z ¡Â 0.1) radio galaxies with optical counterparts to address the question of how long a typical galaxy spends in radio active and quiescent states. The length of the active phase has a strong dependence on the stellar mass of the host galaxy. Radio sources in the most massive hosts are also retriggered more frequently. The time spent in the active phase has the same dependence on stellar mass as does the gas cooling rate, suggesting the onset of the quiescent phase is due to fuel depletion. We find radio and emission-line active galactic nuclei (AGN) activity to be independent, consistent with these corresponding to different accretion states.

Item Details

Item Type:Refereed Article
Keywords:galaxies: active – intergalactic medium – galaxies: jets – galaxies: luminosity
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Astronomical sciences not elsewhere classified
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Shabala, SS (Associate Professor Stas Shabala)
ID Code:72486
Year Published:2008
Web of Science® Times Cited:99
Deposited By:Physics
Deposited On:2011-08-29
Last Modified:2020-12-02

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