VLT, VLTI, CFHT ... what next ? High angular resolution instrumentation 2010-2020 long-term review

Physics – Optics

Scientific paper

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Scientific paper

The 8-m class telescopes are now in operation, and large interferometers VLTI, KeckI) will become available very soon. A working group from the French high angular resolution community tried to indentify what could be our post-VLT/VLTI instruments for the period 2010 to 2020. Possible future instruments, ground or space-based, can be splitted into three main categories: Extremely large filled aperture telescopes, diluted interferometric arrays for direct imaging, or aperture synthesis imaging. These concepts are compared in terms of scientific perfomances (spatial resolution, field of view, imaging capability, sensitivity, photometric dynamic range, etc) and in terms of technological issues (adaptive optics, phasing, instrument mount, etc). A list of R&D priorities for the coming years is given.

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