NOAO >   Observing Info >   Approved Programs >   2009A-0022

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Proposal Information for 2009A-0022


PI: Kevin Luhman, Penn State University, kluhman@astro.psu.edu
Address: Department of Astronomy and Astrophysics, 525 Davey Lab, University Park, PA 16803, USA

Title: Estimating the Mass of a Young Substellar Companion

Abstract: Schmidt & Neuhauser (2008) have recently discovered a faint companion to the young star CT Cha in the Chamaeleon I star-forming region ((tau)~2 Myr; d=165 pc). They have measured a spectral type of M9-L3 for the companion using a near-infrared spectrum and have estimated a mass of 1-16 M_\rm Jup, which would make it one of the least massive companions detected in direct images. I propose to use GMOS to obtain an optical spectrum of CT Cha B to accurately measure its spectral type (+/-0.5 subclass), which will enable a much better estimate its mass.


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NOAO >   Observing Info >   Approved Programs >   2009A-0022

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