EAS Publications Series
Volume 57, 2012Low-Mass Stars and the Transition Stars/Brown Dwarfs - Evry Schatzman School on Stellar Physics XXIII
|Page(s)||45 - 89|
|Published online||30 November 2012|
C. Reylé, C. Charbonnel and M. Schultheis (eds)
EAS Publications Series, 57 (2012) 45-89
Measuring the Initial Mass Function of Low Mass Stars and Brown Dwarfs
Astrophysics Group, Keele University,
Staffordshire, ST5 5BG,
I review efforts to determine the form and any lower limit to the initial mass function in the Galactic disk, using observations of low-mass stars and brown dwarfs in the field, young clusters and star forming regions. I focus on the methodologies that have been used and the uncertainties that exist due to observational limitations and to systematic uncertainties in calibrations and theoretical models. I conclude that whilst it is possible that the low-mass IMFs deduced from the field and most young clusters are similar, there are too many problems to be sure; there are examples of low-mass cluster IMFs that appear to be very discrepant and the IMFs for brown dwarfs in the field and young clusters have yet to be reconciled convincingly.
© EAS, EDP Sciences 2012
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