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2011•Astronomy and AstrophysicsOpen access

The substellar mass function in the central region of the open cluster Praesepe from deep LBT observations

Wei Wang, S. Boudreault, B. Goldman, Th. Henning, J. A. Caballero, C. A. L. Bailer‐Jones

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Abstract

Context. Studies of the mass function (MF) of open clusters of different ages allow us to probe the efficiency with which brown dwarfs evaporate from clusters to populate the field. Surveys of older clusters (age ≳ 100 Myr) are not affected so severely by several problems encountered in young clusters, such as intra-cluster extinction and large uncertainties in brown dwarf models.

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Context. Studies of the mass function (MF) of open clusters of different ages allow us to probe the efficiency with which brown dwarfs evaporate from clusters to populate the field. Surveys of older clusters (age ≳ 100 Myr) are not affected so severely by several problems encountered in young clusters, such as intra-cluster extinction and large uncertainties in brown dwarf models.

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Available abstract

Context. Studies of the mass function (MF) of open clusters of different ages allow us to probe the efficiency with which brown dwarfs evaporate from clusters to populate the field. Surveys of older clusters (age ≳ 100 Myr) are not affected so severely by several problems encountered in young clusters, such as intra-cluster extinction and large uncertainties in brown dwarf models.

Key concepts: Brown dwarf, Open cluster, Physics, Astrophysics, Cluster (spacecraft), Extinction (optical mineralogy), Very Large Telescope, Astronomy

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