NOAO >   Observing Info >   Approved Programs >   2009A-0247

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Proposal Information for 2009A-0247


PI: Douglas R. Gies, Georgia State University, gies@chara.gsu.edu
Address: Physics Department, P.O. Box 4106, Atlanta, GA 30302-4106, USA

CoI: Wenjin Huang, University of Washington
CoI: Rachel Matson, Georgia State University
CoI: Saida Caballero-Nieves, Georgia State University

Title: Angular Momentum of Newborn Massive Stars in M17

Abstract: The star forming region of M17 offers us a glimpse of some of the youngest and most massive stars in our part of the Galaxy. The first O- stars to appear from the natal cloud offer us important clues about how the star formation process solves the angular momentum problem in creating massive stars. Here we propose a program of spatially resolved, moderate dispersion spectroscopy with Gemini and NIFS/Altair of the brightest O-stars in M17. These observations will establish the incidence of close and wide binaries and determine the projected rotational velocities (plus the stellar effective temperatures and gravities). The results will show how the angular momentum of the natal cloud is apportioned into rotational and orbital angular momentum for the most massive stars.


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NOAO >   Observing Info >   Approved Programs >   2009A-0247

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