12 papers
NAHUAL: A cool spectrograph for planets of ultra-cool objects
E. W. Guenther, E. L. Martin, D. Barrado y Navascues +1
We present the status of an ongoing study to built a a high resolution near infrared Echelle spectrograph (NAHUAL) for the 10.4-m-Gran Telescopio Canarias (GTC) which will be espec…
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…
Lambda Orionis: A 0.02-50 Msun Initial Mass Function
David Barrado y Navascues, J. R. Stauffer, J. Bouvier
The Lambda Orionis Star Forming Region is dominated by the O8 III star lambda^1 Ori. Among other structures, it includes a CO and a dust ring whose diameter is about nine deg, the…
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 low mas end of the young cluster IC2391
David Barrado y Navascues, John R. Stauffer
By collecting optical and infrared photometry, as well as medium resolution spectroscopy, we have discovered a sample of low mass stars and brwon dwarfs in the young cluster IC2391…
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…