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The Outburst of V1647 Ori Revealed by Spitzer
J. Muzerolle, S. T. Megeath, K. M. Flaherty +4
We present Spitzer Space Telescope observations of V1647 Ori, the outbursting source lighting McNeil's nebula, taken near the optical peak of the outburst in early March 2004. The…
Embedded Clusters and the IMF
Charles J. Lada
Despite valiant efforts over nearly five decades, attempts to determine the IMF over a complete mass range for galactic field stars and in open clusters have proved difficult. Infr…
Chandra Orion Ultradeep Project: Observations and Source Lists
K. V. Getman, E. Flaccomio, P. S. Broos +21
We present a description of the data reduction methods and the derived catalog of more than 1600 X-ray point sources from the exceptionally deep January 2003 Chandra X-ray Observat…
Deep 3.8 micron Observations of the Trapezium Cluster
C. J. Lada, A. A. Muench, E. A. Lada +1
We present deep 3.8 micron observations of the Trapezium cluster in Orion obtained with the ESO VLT. We use these data to search for infrared excess emission and evidence for proto…
Discovery of a Dusty Ring in the Coalsack: A Dense Core Caught in the Act of Formation?
Charles J. Lada, Tracy L. Huard, Lionel J. Crews +1
We present a new infrared extinction study of Globule 2, the most opaque molecular cloud core in the Coalsack complex. Using deep near-infrared imaging observations obtained with t…
The Structure of Brown Dwarf Circumstellar Disks
Christina Walker, Kenneth Wood, C. J. Lada +3
We present synthetic spectra for circumstellar disks that are heated by radiation from a central brown dwarf. Under the assumption of vertical hydrostatic equilibrium, our models y…