The impact of X-rays on molecular cloud fragmentation and the IMF

Details The impact of X-rays on molecular cloud fragmentation and the IMF The impact of X-rays on molecular cloud fragmentation and the IMF

2010-08-31

arxiv.org/abs/1008.5284v2

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

6 pages, 4 figures. Accepted for publication in Astronomy and Astrophysics

Scientific paper

10.1051/0004-6361/201015055

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, 10^7 M_o 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.

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