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AGN feedback by relativistic jets

Published online by Cambridge University Press:  24 March 2015

G. V. Bicknell
Affiliation:
Research School of Astronomy & Astrophysics, Australian National University, Weston ACT 2611, Australia email: geoff.bicknell@anu.edu.au
B. R. McNamara
Affiliation:
Department of Physics and Astronomy, University of Waterloo, Waterloo, ON, Canada
M. A. Nawaz
Affiliation:
Research School of Astronomy & Astrophysics, Australian National University, Weston ACT 2611, Australia email: geoff.bicknell@anu.edu.au
R. S. Sutherland
Affiliation:
Research School of Astronomy & Astrophysics, Australian National University, Weston ACT 2611, Australia email: geoff.bicknell@anu.edu.au
M. Umemura
Affiliation:
Center for Computational Science, Tsukuba University, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577Japan
A. Y. Wagner
Affiliation:
Center for Computational Science, Tsukuba University, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577Japan
Corresponding
E-mail address:
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Abstract

Feedback provided by relativistic jets may be effective in shaping the galaxy luminosity function. The quenching mode (quasar mode) at redshifts ~2-3 potentially disperses gas in star-forming galaxies. The maintenance mode (radio mode) heats the gas in galaxy clusters counteracting cooling flows. A number of authors have examined the effect of relativistic jets in dispersing clouds in the kpc-scale inhomogeneous interstellar medium of evolving galaxies. We have also investigated a particular case of maintenance-mode feedback in our simulation of the iconic radio galaxy / cooling flow cluster Hydra A. Modelling of the knots produced by the jets in the inner 10 kpc provides an estimate of 0.8 – 0.9 c for the velocities of the jets in agreement with other velocity estimates for FR1 jets. The addition of jet precession provides realistic simulations of the morphology of the Hydra A radio source and raises interesting questions as to the role of black hole and disk precession, in general, in galaxy formation.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2015 

References

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