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Radio source feedback in galaxy evolution


Shabala, SS and Alexander, P, Radio source feedback in galaxy evolution, The Astrophysical Journal, 699, (1) pp. 525-538. ISSN 0004-637X (2009) [Refereed Article]

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DOI: doi:10.1088/0004-637X/699/1/525


We present a galaxy evolution model which incorporates a physically motivated implementation of active galactic nucleus feedback. Intermittent jets inflate cocoons of radio plasma which then expand supersonically, shock heating the ambient gas. The model reproduces observed star formation histories to the highest redshifts for which reliable data exist, aswell as the observed galaxy color bimodality. Intermittent radio source feedback also naturally provides a way of keeping the black hole and spheroid growth in step. We find possible evidence for a top-heavy initial mass function for z > 2, consistent with observations of element abundances, and submillimeter and Lyman break galaxy counts.

Item Details

Item Type:Refereed Article
Keywords:galaxies: active – galaxies: evolution – galaxies: formation
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Astronomical instrumentation
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:72534
Year Published:2009
Web of Science® Times Cited:26
Deposited By:Physics
Deposited On:2011-08-29
Last Modified:2014-12-01

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