What does a universal IMF imply about star formation?

Abstract

We show that the same initial mass function (IMF) can result from very different modes of star formation from very similar underlying core and/or system mass functions. In particular, we show that the canonical IMF can be recovered from very similar system mass functions, but with very different mass ratio distributions within those systems. This is a consequence of the basically log-normal shapes of all of the distributions. We also show that the relationships between the shapes of the core, system, and stellar mass functions may not be trivial. Therefore, different star formation in different regions could still result in the same IMF.

6 pages, 4 figures. MNRAS, in press

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• A revolution in star cluster research: setting the scene
• Mapping the core mass function onto the stellar IMF: multiplicity matters
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• On turbulent fragmentation and the origin of the stellar IMF
• What does the IMF really tell us about star formation?
• Young massive star clusters: Achievements and challenges