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AGN feedback and star formation in ETGs: negative and positive feedback

Published online by Cambridge University Press:  12 September 2016

Luca Ciotti
Affiliation:
Dept. of Physics and Astronomy, University of Bologna, via Ranzani 1, I-40127 Bologna, Italy, email: luca.ciotti@unibo.it
Jeremiah P. Ostriker
Affiliation:
Dept. of Astrophysical Sciences, Princeton University, NJ, USA Dept. of Astronomy and Astrophysics, Columbia University, NY, USA
Andrea Negri
Affiliation:
Dept. of Physics and Astronomy, University of Bologna, via Ranzani 1, I-40127 Bologna, Italy, email: luca.ciotti@unibo.it Institut d'Astrophysique de Paris, CNRS, UMR 7095 98bis bvd Arago, F-75014 Paris, France
Silvia Pellegrini
Affiliation:
Dept. of Physics and Astronomy, University of Bologna, via Ranzani 1, I-40127 Bologna, Italy, email: luca.ciotti@unibo.it
Silvia Posacki
Affiliation:
Dept. of Physics and Astronomy, University of Bologna, via Ranzani 1, I-40127 Bologna, Italy, email: luca.ciotti@unibo.it
Greg Novak
Affiliation:
Observatoire de Paris, LERMA, CNRS, 61 Av de l'Observatoire, F-75014 Paris, France
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Abstract

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AGN feedback from supermassive black holes (SMBHs) at the center of early type galaxies is commonly invoked as the explanation for the quenching of star formation in these systems. The situation is complicated by the significant amount of mass injected in the galaxy by the evolving stellar population over cosmological times. In absence of feedback, this mass would lead to unobserved galactic cooling flows, and to SMBHs two orders of magnitude more massive than observed. By using high-resolution 2D hydrodynamical simulations with radiative transport and star formation in state-of-the-art galaxy models, we show how the intermittent AGN feedback is highly structured on spatial and temporal scales, and how its effects are not only negative (shutting down the recurrent cooling episodes of the ISM), but also positive, inducing star formation in the inner regions of the host galaxy.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2016 

References

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