The impact of X-rays on molecular cloud fragmentation and the inital mass function
Kapteyn Astronomical Institute, University of Groningen,
PO Box 800,
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Accepted: 24 August 2010
Star formation is regulated through a variety of feedback processes. In this study, we treat feedback by X-rays and discuss its implications. Our aim is to investigate whether star formation is significantly affected when a star forming cloud resides in the vicinity of a strong X-ray source. We perform an Eulerian grid simulation with embedded Lagrangian sink particles of a collapsing molecular cloud near a massive, 107 M⊙ black hole. The chemical and thermal changes caused by radiation are incorporated into the FLASH code. When there is strong X-ray feedback the star forming cloud fragments into larger clumps whereby fewer but more massive protostellar cores are formed. Competitive accretion has a strong impact on the mass function and a near-flat, non-Salpeter IMF results.
Key words: ISM: clouds / stars: formation / X-rays: ISM / methods: numerical
© ESO, 2010