NOAO >   Observing Info >   Approved Programs >   2013B-0433

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Proposal Information for 2013B-0433


PI: Gerard van Belle, Lowell Observatory, gerard@lowell.edu
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.


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NOAO >   Observing Info >   Approved Programs >   2013B-0433

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