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Discovery of new embedded Herbig-Haro objects in the rho Ophiuchi dark cloud
Nicolas Grosso, Joao Alves, Ralph Neuhaeuser +1
We report here the discovery of a 30"-chain of embedded Herbig-Haro (HH) objects in the rho Ophiuchi dark cloud. These HH objects were first detected during a deep K_S-band observa…
Mapping the interstellar dust with near-infrared observations: An optimized multi-band technique
Marco Lombardi, Joao Alves
We generalize the technique of Lada et al. (1994) to map dust column density through a molecular cloud (NICE) to an optimized multi-band technique (NICER) that can be applied to an…
Structure of Protostellar Collapse Candidate B335 Derived from Near-Infrared Extinction Maps
Daniel W. A. Harvey, David J. Wilner, Charles J. Lada +3
We present a near-infrared extinction study of the dark globule B335, a protostellar collapse candidate, using data from HST/NICMOS and the W.M. Keck Observatory. These data allow…
Evidence for Circumstellar Disks around Young Brown Dwarfs in the Trapezium Cluster
August Muench, Joao Alves, Charles Lada +1
We report the results of deep infrared observations of brown dwarf candidates in the Trapezium cluster in Orion. Analysis of the JHK color-color diagram indicates that a large frac…
Molecular Excitation and Differential Gas-Phase Depletions in the IC 5146 Dark Cloud
E. A. Bergin, D. R. Ciardi, C. J. Lada +2
We present a combined near-infrared and molecular-line study of 25' x 8' area in the Northern streamer of the IC 5146 cloud. Using the technique pioneered by Lada et al 1994, we co…
Ground-based exoplanet near-infrared search by imaging and spectroscopy: 3 new companion candidates in TWA
Ralph Neuhaeuser, Nuria Huelamo, Eike W. Guenther +5
We report first results from our ground-based infrared imaging search for sub-stellar companions (brown dwarfs and giant planets) of young (up to 100 Myrs) nearby (up to 100 pc) st…