Fakultät für Physik und Astronomie
STEPHEN PHILLIPS hostreviews.co.uk / UNSPLASH

Winds and Radiation in Unison: A new 1D Feedback Model for Cloud Dissolution

Daniel Rahner

Star formation in molecular clouds is inefficient. One possible reason for this is stellar feedback in the form of winds, radiation and supernova explosions which disrupt clouds, drive large shells, and shut off star formation. It is still not clear which of these feedback processes dominates. Since radiative and mechanical feedback are highly interconnected, this question can only be answered if all feedback processes as well as gravity are accounted for in a self-consistent manner and if the coupling between radiation and matter is taken into account properly. To this end, we present a new semi-analytic feedback model which calculates shell dynamics and structure simultaneously. It allows us to scan a large range of physical parameters and to estimate escape fractions of ionizing radiation, the minimum star formation efficiency required to drive an outflow, and re-collapse times for clouds in which feedback fails.

ITA "blackboard" Colloquium
15 May 2017, 11:15
Philosophenweg, 12, 106

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