Search and characterization of T-type planetary mass candidates in the σ Orionis cluster
Context. The proper characterization of the least massive population of the young σ Orionis star cluster is required to understand the form of the cluster mass function and its impact on our comprehension of the substellar formation processes. S Ori 70 (T5.5 ± 1) and 73, two T-type cluster member candidates, are likely to have masses between 3 and
Peña-Ramírez, K. et al.
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2011