Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-09-19
Astronomy and Astrophysics
Astrophysics
To be published in the proceedings of the "Galactic and Stellar Dynamics 2008" conference. 4 pages, 4 figures
Scientific paper
10.1002/asna.200811064
We present binary galaxy merger simulations of gas-rich disks (Sp-Sp), of early-type galaxies and disks (E-Sp, mixed mergers), and mergers of early-type galaxies (E-E, dry mergers) with varying mass ratios and different progenitor morphologies. The simulations include radiative cooling, star formation and black hole (BH) accretion and the associated feedback processes. We find for Sp-Sp mergers, that the peak star formation rate and BH accretion rate decrease and the growth timescales of the central black holes and newly formed stars increase with higher progenitor mass ratios. The termination of star formation by BH feedback in disk mergers is significantly less important for higher progenitor mass ratios (e.g. 3:1 and higher). In addition, the inclusion of BH feedback suppresses efficiently star formation in dry E-E mergers and mixed E-Sp mergers.
Burkert Andreas
Johansson Peter Hilding
Naab Thorsten
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