A census of very-low-mass stars and brown dwarfs in the σ Orionis cluster
Context: The knowledge of the initial mass function (IMF) in open clusters constitutes one way of constraining the formation of low-mass stars and brown dwarfs, along with the frequency of multiple systems and the properties of disks. Aims: The aim of the project is to determine the shape of the mass function in the low-mass and substellar regimes
Lodieu, N. et al.
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10
2009