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| Paper: |
Stellar and Substellar Mass Function of the Young Open Cluster
Candidates Alessi 5 and β Monocerotis |
| Volume: |
448, 16th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun |
| Page: |
565 |
| Authors: |
Boudreault, S.; Caballero, J. A. |
| Abstract: |
Although the stellar and substellar populations have been studied in
various young and old open clusters, additional studies in clusters
in the the age range from 5 to 100 Myr is crucial (e.g. to give
more constrains on initial mass function variation with improved
statistics). Among the open cluster candidates from recent studies,
two clusters are best suited for photometric survey of very-low mass
stars and brown dwarfs, considering their youth and relative
proximity: Alessi 5 (τ∼40 Myr, d∼400 pc) and
β Monocerotis (τ∼9.1 Myr, d∼400 pc). For
both clusters, we performed an optical and near-infrared photometric
survey, and a virtual observatory survey. Our survey is predicted to
be sensitive from the massive B main sequence stars down to brown
dwarfs of 30 MJup. Here, we present and discuss
preliminary results, including the mass function obtained for Alessi
5, which is surprisingly very similar to the mass function of the
Hyades (τ∼600 Myr), although they are of very different
ages. |
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