The Maturing of Galaxies by Feedback from Jets
Final Report Abstract
How does feedback from active galactic nuclei (AGN) regulate the growth and evolution of galaxies? This question has been discussed widely in recent years as cosmological studies have shown that AGN feedback may avoid the formation of too massive and blue present-day galaxies and result in down-sizing in star formation. In this project, the “radio mode” jet feedback scenario was to be examined in high resolution to understand the physical processes occurring and their impact on galaxy evolution. Within three sub-projects, we have examined the interaction of powerful jets with a clumpy galactic gaseous disk, the details of their interaction with the clumps, the consequences for the galactic star formation and distribution of stars and explore the impact of jet activity in a cosmological zoom simulation in a still ongoing sub-project. We found that observed asymmetries in medium-sized jets may be substantially attributed to strong feedback in galaxies and they can be directly linked by a statistical approach to the global properties of the interstellar medium of the galaxy. The violent interaction of a jet is found to have considerable impact on the galactic star formation rate in high-redshift galaxies (formation of ∼> 10^9 M⊙ stars within only one duty cycle) with clear signatures imprinted on the formed stars.
Publications
- (2009). Very light magnetized jets on large scales–I. Evolution and magnetic fields. Monthly Notices of the Royal Astronomical Society, 400(4), 1785-1802
Gaibler, V., Krause, M., Camenzind, M.
(See online at https://doi.org/10.1111/j.1365-2966.2009.15625.x) - (2010) Numerical Models for Emission Line Nebulae in High Redshift Radio Galaxies, in High Performance Computing in Science and Engineering ’09, ed. W. E. Nagel, D. B. Kröner, M. M. Resch (Berlin: Springer-Verlag), p. 3
Gaibler, V., Camenzind, M.
(See online at https://doi.org/10.1007/978-3-642-04665-0_1) - 2010, in AGN Feedback in Galaxy Formation, ed. V. Antonuccio-Delogu, J. Silk (Cambridge University Press), p. 183
Krause, M. G. H., Gaibler, V.
- (2011). Asymmetries in extragalactic double radio sources: clues from 3D simulations of jet–disc interaction. Monthly Notices of the Royal Astronomical Society, 411(1), 155-161
Gaibler, V., Khochfar, S., Krause, M.
(See online at https://doi.org/10.1111/j.1365-2966.2010.17674.x) - (2011). The specific star formation rate of high redshift galaxies: the case for two modes of star formation. Monthly Notices of the Royal Astronomical Society: Letters, 410(1), L42-L46
Khochfar, S., Silk, J.
(See online at https://doi.org/10.1111/j.1745-3933.2010.00976.x)
