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The origin of the IMF from core mass functions

Goodwin, S.P., Whitworth, Anthony Peter and Ward-Thompson, D. 2004. The origin of the IMF from core mass functions. Presented at: The Young Local Universe: XXIVth Moriond Astrophysics Meeting, La Thuile, Italy, 21-28 March 2004.

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We examine the initial mass functions (IMFs) of stars produced by different molecular core mass functions. Simulations suggest that more massive cores produce more stars, so we propose a model in which the average number of stars formed in a core is equal to the initial number of Jeans masses in that core. Small- N systems decay through dynamical interactions, ejecting low-mass stars and brown dwarfs which populate the low-mass tail of the IMF. Stars which remain in cores are able to competitively accrete more gas and become more massive. We deduce the forms of the core mass functions required to explain the IMFs of Taurus, Orion, IC 348 and NGC 2547. These core mass functions fall into two categories - one which peaks at a few Mq to explain Taurus and NGC 2547, and one that peaks at around 0.2Mq to explain Orion and IC 348.

Item Type: Conference or Workshop Item (Lecture)
Date Type: Completion
Status: Unpublished
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
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Last Modified: 04 Jun 2017 08:03

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