========================================================================== J/A+A/510/A27 Very low mass stars in Praesepe (Boudreault+, 2010) The following files can be converted to FITS (extension .fit or fit.gz) table3.dat table4.dat ========================================================================== Query from: http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=J/A+A/510/A27 ==========================================================================
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Beginning of ReadMe : J/A+A/510/A27 Very low mass stars in Praesepe (Boudreault+, 2010) ================================================================================ Brown dwarfs and very low mass stars in the Praesepe open cluster: a dynamically unevolved mass function? Boudreault S., Bailer-Jones C.A.L., Goldman B., Henning T., Caballero J.A. <Astron. Astrophys., 510, A27-27 (2010)> =2010A&A...510A..27B ================================================================================ ADC_Keywords: Clusters, open ; Photometry, infrared Keywords: open clusters and associations: individual: Praesepe - stars: low-mass - stars: brown dwarfs - stars: luminosity function, mass function - stars: formation Abstract: Determination of the mass functions of open clusters of different ages allows us to infer the efficiency with which brown dwarfs are evaporated from clusters to populate the field. In this paper we present the results of a photometric survey to identify low mass and brown dwarf members of the old open cluster Praesepe (age 590^+150^_-120_Myr, distance 190^+6.0^_-5.8_pc) from which we estimate its mass function and compare this with that of other clusters. We performed an optical (Ic-band) and near-infrared (J and Ks-band) photometric survey of Praesepe covering 3.1deg^2^. With 5sigma detection limits of Ic=23.4 and J=20.0, our survey is predicted to be sensitive to objects with masses from 0.6 to 0.05M_sun. Description: The near-infrared (NIR) observations were made on the 3.5m telescope at Calar Alto, Spain (with observation runs of several nights from February 2005 to January 2007). The optical observations were carried out with the Wide Field Imager (WFI) on the MPG/ESO 2.2m telescope at La Silla, Chile during 17-22 March 2007.