NOAO >   Observing Info >   Approved Programs >   2003B-0377

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Proposal Information for 2003B-0377


PI: Masahiro Tsujimoto, Pennsylvania State University, tsujimot@cr.scphys.kyoto-u.ac.jp
Address: Astronomy Department, 525 Davey Lab, University Park, PA 16802, USA

CoI: Naoto Kobayashi, NAOJ
CoI: Yohko Tsuboi, Chuo University
CoI: Yu-ichiro Ezoe, the University of Tokyo

Title: Multi-object K-band Spectroscopy of the X-ray-emitting YSOs Detected by Chandra in Orion Molecular Clouds

Abstract: We propose K-band multi-object spectroscopy observations of NIR- identified Chandra sources in Orion molecular cloud 2 and 3. Using FLAMINGOS, we aim to determine the effective temperatures of NIR- identified Chandra sources using temperature-sensitive lines/bands in order to estimate their mass and age on a source basis using the HR diagram. These will give a uniform sample to examine any relations between X-ray properties (X-ray luminosity and plasma temperature) and stellar parameters (age and mass) with a statistically meaningful number of samples. This is the first comprehensive NIR spectroscopy follow-up observation of X-ray-emitting PMS sources in Chandra fields, which will be an important step to understand the origin of the X-ray emissions from PMS sources.


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NOAO >   Observing Info >   Approved Programs >   2003B-0377

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