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High-Resolution Near Infrared Spectroscopy of HD 100546: II. Analysis of variable rovibrational CO emission lines
Sean D. Brittain, Joan R. Najita, John S. Carr +3
We present observations of rovibrational CO in HD 100546 from four epochs spanning January 2003 through December 2010. We show that the equivalent widths of the CO lines vary durin…
DIGIT survey of far-infrared lines from protoplanetary disks I
D. Fedele, S. Bruderer, E. F. van Dishoeck +10
[abridged] We present far-infrared spectroscopic observations of PMS stars taken with Herschel/PACS as part of the DIGIT key project. The sample includes 22 Herbig AeBe and 8 T Tau…
The Curious Case of Glass I: High Ionization and Variability of Different Types
Andrew J. Kruger, Matthew J. Richter, John S. Carr +4
Our Spitzer IRS observation of the infrared companion Glass Ib revealed fine structure emission with high ionization ([NeIII]/[NeII]=2.1 and [SIV]/[SIII]=0.6) that indicates the ga…
The Hubble Space Telescope Treasury Program on the Orion Nebula Cluster
M. Robberto, D. R. Soderblom, E. Bergeron +27
The Hubble Space Telescope (HST) Treasury Program on the Orion Nebula Cluster has used 104 orbits of HST time to image the Great Orion Nebula region with the Advanced Camera for Su…
Transitional disks and their origins: an infrared spectroscopic survey of Orion A
K. H. Kim, Dan M. Watson, P. Manoj +10
Transitional disks are protoplanetary disks around young stars, with inner holes or gaps which are surrounded by optically thick outer, and often inner, disks. Here we present obse…
The HCN-Water Ratio in the Planet Formation Region of Disks
Joan R. Najita, John S. Carr, Klaus M. Pontoppidan +3
We find a trend between the mid-infrared HCN/H2O flux ratio and submillimeter disk mass among T Tauri stars in Taurus. While it may seem puzzling that the molecular emission proper…