11 papers
The Collinder 69 cluster in the context of the Lambda Orionis SFR
David Barrado y Navascues, J. R. Stauffer, J. Bouvier +1
The Lambda Orionis Star Forming Region is a complex structure which includes the Col 69 (Lambda Orionis) cluster and the B30 & B35 dark clouds. We have collected deep optical photo…
The lower mass function of young open clusters
J. Bouvier, E. Moraux, J. R. Stauffer +2
We report new estimates for the lower mass function of 5 young open clusters spanning an age range from 80 to 150 Myr. In all studied clusters, the mass function across the stellar…
The Brown Dwarf Deficit in Taurus: Evidence for a Non-Universal IMF
Cesar Briceno, Kevin Luhman, Lee Hartmann +2
We present the results of a deep, optical/IR wide field imaging survey of selected fields in the nearby (d ~ 140 pc) Taurus star-forming region. We report the discovery of 9 new me…
Ages, Distances, and the Initial Mass Functions of Stellar Clusters
J. R. Stauffer, R. D. Jeffries, E. L. Martin +1
We provide a review of the current status of several topics on the ages, distances, and mass functions of open clusters, with a particular emphasis on illuminating the areas of unc…
A Lithium Age for the Young Cluster IC2391
D. Barrado y Navascues, J. R. Stauffer, B. M. Patten
We have identified a large number of possible very low mass members of the cluster IC2391 based primarily on their location in an I versus (R-I)_C CM diagram. We have obtained new…
Deep Photometric Survey of IC2391
D. Barrado y Navascues, J. R. Stauffer, C. Briceño
We present a deep survey of the young southern cluster IC2391. We have covered 2 sq. degrees in the R,I filter. We have selected several dozens VLM stars and BD candidates based on…