The effect of photoionizing feedback on star formation in isolated and colliding clouds
Date
2018
Authors
Shima, Kazuhiro
Tasker, Elizabeth J.
Federrath, Christoph
Habe, Asao
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Publisher
Astronomical Society of Japan
Abstract
We investigate star formation occurring in idealized giant molecular clouds, comparing structures that evolve in isolation versus those undergoing a collision. Two different collision speeds are investigated and the impact of photoionizing radiation from the stars is determined. We find that a colliding system leads to more massive star formation both with and without the addition of feedback, raising overall star formation efficiencies (SFE) by a factor of 10 and steepening the high-mass end of the stellar mass function. This rise in SFE is due to increased turbulent compression during the cloud collision. While feedback can both promote and hinder star formation in an isolated system, it increases the SFE by approximately 1.5 times in the colliding case when the thermal speed of the resulting H II regions matches the shock propagation speed in the collision.
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Keywords
ISM: clouds, methods: numerical, stars: formation
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Publications of the Astronomical Society of Japan
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Journal article
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Open Access
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Restricted until
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