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There is mounting evidence for the coevolution of galaxies and their embeddedmassive black holes (MBHs) in a hierarchical structure formation paradigm. Totackle the nonlinear processes of galaxy-MBH interaction, we describe aself-consistent numerical framework which incorporates both galaxies and MBHs.The high-resolution adaptive mesh refinement (AMR) code Enzo is modified tomodel the formation and feedback of molecular clouds at their characteristicscale of 15.2 pc and the accretion of gas onto a MBH. Two major channels of MBHfeedback, radiative feedback (X-ray photons followed through full 3D adaptiveray tracing) and mechanical feedback (bipolar jets resolved in high-resolutionAMR), are employed. We investigate the coevolution of a 9.2e11 Msun galactichalo and its 1e5 Msun embedded MBH at redshift 3 in a cosmological LCDMsimulation. The MBH feedback heats the surrounding ISM up to 1e6 K throughphotoionization and Compton heating and locally suppresses star formation inthe galactic inner core. The feedback considerably changes the stellardistribution there. This new channel of feedback from a slowly growing MBH isparticularly interesting because it is only locally dominant, and does notrequire the heating of gas globally on the disk. The MBH also self-regulatesits growth by keeping the surrounding ISM hot for an extended period of time.

Galaxy Formation with Self-consistently Modeled Stars and Massive Black Holes. I: Feedback-regulated Star Formation and Black Hole Growth