Abstract
In order to compile a sample of ultracool dwarfs that will serve as benchmarks for testing theoretical formation and evolutionary models, we selected low-mass cool (>M7) objects that are potentially members of five known young Moving Groups in the solar neighbourhood.
Highlights
We have studied the kinematics of the sample, finding that 49 targets belong to the young disk area, from which 36 are kinematic member of one of the five moving groups under study
Identifying members of known moving groups (MG) or open clusters provides an important constraint on age and composition
While low-mass objects and brown dwarfs (BDs) evolutionary models are still pending of a good calibration at young age, compiling a sample of assessed members of any MG would allow the use of these objects as a test-bed for these models
Summary
Identifying members of known moving groups (MG) or open clusters provides an important constraint on age and composition. While low-mass objects and brown dwarfs (BDs) evolutionary models are still pending of a good calibration at young age, compiling a sample of assessed members of any MG would allow the use of these objects as a test-bed for these models. We assume the classical MG concept: a moving group is a young stellar population that shares a common space motion [1]) whose members have a common origin – sharing age and composition. See [2], [3] and [4] for details Spect. range (Å) 3500-9200 6650-10425 15532-15606 6650-10425 5700-7530 & 7650-9470 6550-10000 4300-10800
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