PI: Gerard van Belle, Lowell Observatory, email@example.com
Address: n/a, 1400 West Mars Hill Road, Flagstaff, Arizona 86001, United States
CoI: David Ciardi, California Institute of Technology
CoI: Steve Howell, NASA Ames
CoI: Elliott P. Horch, Southern Connecticut State University
Title: Stellar Diameters & Surface Imaging with DSSI
Abstract: Given the combination of operating wavelength and aperture size, DSSI on Gemini is the highest angular resolution single-aperture optical instrument currently available, worldwide. We propose to push the resolutions limits of DSSI by operating in the near-UV, and leverage the resulting ~8.5mas resolution to measure the diameters of 11 nearby bright giant and supergiant stars with DSSI on Gemini-N. For the 5 larger targets in our sample (\theta>22mas), we also expect to recover simple images with 2\times2 to 5\times5 effective pixels, with differential, simultaneous imaging in and out of line features being particularly sensitive to surface morphology.
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360