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

Wang, W.; Boudreault, S.; Caballero, J.; Bailer-Jones, C. A. L.; Goldman, B.; Henning, Th.
Referencia bibliográfica

Research, Science and Technology of Brown Dwarfs and Exoplanets: Proceedings of an International Conference held in Shangai on Occasion of a Total Eclipse of the Sun, Shangai, China, Edited by E.L. Martin; J. Ge; W. Lin; EPJ Web of Conferences, Volume 16, id.06011

Fecha de publicación:
7
2011
Número de autores
6
Número de autores del IAC
0
Número de citas
0
Número de citas referidas
0
Descripción
Studies of the mass function of open clusters of different ages allow us to study the efficiency with which brown dwarfs are evaporated from clusters to populate the field. Surveys in relatively old clusters (age ≳100 Myr) do not suffer from problems found in young clusters, such as intra-cluster extinction and large uncertainties in brown dwarf models. In this paper, we present the results of a photometric survey to study the mass function of the old open cluster Praesepe (age of ~590 Myr and distance of ~190 pc), down to the substellar regime. We have performed optical (riz and Y-band) photometric survey of Praesepe with the Large Binocular Telescope Camera, for a spatial coverage of 0.61 deg2 from ~90 MJ down to a 5σ detection limit at 40 MJ.