Feedback Processes

Mordecai-Mark Mac Low

American Musuem of Natural History (+ MPIA/ITA-ZAH)

The lack of complete efficiency of gas consumption in massive star forming regions suggests that accretion is cut off by feedback from the newly formed stars. The initial mass function of the stars might be determined by this feedback. I will review the evidence for the importance of feedback in general, and for different mechanisms including ionizing radiation, collimated outflows, and stellar winds.