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Laboratory Drop Towers for the Experimental Simulation of Dust-aggregate Collisions in the Early Solar System

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Fragmentation in massive star formation.

Henrik Beuther¹, Peter Schilke

¹Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA. hbeuther@cfa.harvard.edu

Science (New York, N.Y.)

|February 21, 2004

Summary

Massive stars form in clusters within natal cores. New observations show fragmentation of these cores may determine the stellar initial mass function, with accretion driving star formation.

Area of Science:

Astronomy and Astrophysics
Star Formation and Evolution

Background:

Massive stars are observed to form in clustered environments.
Early stages of massive star formation occur within dense natal cores.

Purpose of the Study:

To investigate the structure of a young massive star-forming region.
To determine the protocluster mass distribution and its relation to the stellar initial mass function.

Main Methods:

High-spatial-resolution interferometric dust continuum observations were utilized.
Analysis focused on disentangling the cluster-like structure within the natal core.

Main Results:

The observed protocluster mass distribution aligns with the stellar initial mass function.

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Evidence suggests fragmentation of massive cores is key to setting the initial mass function.

Conclusions:

Star formation across all mass ranges can be explained by accretion processes.
Coalescence of intermediate-mass protostars is likely not a necessary mechanism for massive star formation.