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X-ray Emission from Nitrogen-Type Wolf-Rayet Stars
S. L. Skinner, S. A. Zhekov, M. Guedel +2
We summarize new X-ray detections of four nitrogen-type Wolf-Rayet (WR) stars obtained in a limited survey aimed at establishing the X-ray properties of WN stars across their full…
The Taurus Spitzer Survey: New Candidate Taurus Members Selected Using Sensitive Mid-Infrared Photometry
L. M. Rebull, D. L. Padgett, C. -E. McCabe +31
We report on the properties of pre-main-sequence objects in the Taurus molecular clouds as observed in 7 mid- and far-infrared bands with the Spitzer Space Telescope. There are 215…
Effects of X-ray irradiation and disk flaring on the [NeII] 12.8 micron emission from young stellar objects
E. Schisano, B. Ercolano, M. Guedel
The [Ne II] fine-structure emission line at 12.8 micron has been detected in several young stellar objects (YSO) spectra. This line is thought to be produced by X-ray irradiation o…
Dust amorphization in protoplanetary disks
Adrian M. Glauser, Manuel Guedel, Dan M. Watson +5
High-energy irradiation of the circumstellar material might impact the structure and the composition of a protoplanetary disk and hence the process of planet formation. In this pap…
HDE 245059: A Weak-Lined T Tauri Binary Revealed by Chandra and Keck
C. Baldovin Saavedra, M. Audard, G. Duchêne +5
We present the Chandra High Energy Transmission Grating Spectrometer (HETGS) and Keck observations of HDE 245059, a young weak-lined T Tauri star (WTTS), member of the pre-main seq…
X-ray Emission from the FU Orionis Star V1735 Cygni
S. L. Skinner, K. R. Sokal, M. Gudel +1
The variable star V1735 Cyg (= Elias 1-12) lies in the IC 5146 dark cloud and is a member of the class of FU Orionis objects whose dramatic optical brightenings are thought to be l…