NOAO >   Observing Info >   Approved Programs >   2010B-0564

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Proposal Information for 2010B-0564


PI: Fred Walter, SUNY Stony Brook, fwalter@astro.sunysb.edu
Address: Professor of Astronomy, Department of Physics and Astronomy, Z=3800, Stony Brook University, Stony Brook NY 11794-3800, USA

CoI: Gregory Herczeg, Max-Planck-Institut f?r extraterrestriche Physik
CoI: Suzan Edwards, Smith College
CoI: Jeff Valenti, Space Telescope Science Institute
CoI: David Ardila, Caltech
CoI: Alexander Brown, University of Colorado at Boulder (CASA)

Title: Simultaneity of Accretion and Outflow in Young Stars

Abstract: The character of magnetospheric accretion and the launching of winds in the star-disk interaction region are intimately connected to the early evolution of young stars and protoplanetary disks. We seek to understand accretion and outflow processes by proposing a TOO program with Phoenix on Gemini South to obtain high-resolution spectra of He I 10830, which is an excellent diagnostic of wind and funnel flow geometry. The Phoenix observations will be obtained nearly simultaneous to approved HST/FUV spectra of line diagnostics of the accretion flow and outflow. This powerful combination of accretion+outflow indicators will provide the temperature and opacity at the base of the wind, will reveal how energy is transfered from the accretion shock to the star, and will constrain the structure and origin of these flows. Accretion and outflow indicators vary on a daily timescale, so our TOO observations of He I 10830 must occur within 1 day of the HST observations.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2010B-0564

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