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 (θ>22mas), we also expect to recover simple images with 2×2 to 5×5 effective pixels, with differential, simultaneous imaging in and out of line features being particularly sensitive to surface morphology.
- Publication:
-
NOAO Proposal
- Pub Date:
- August 2013
- Bibcode:
- 2013noao.prop..433V