Hybrid Schemes for Space-based Planet-Finding

Details Hybrid Schemes for Space-based Planet-Finding Hybrid Schemes for Space-based Planet-Finding

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21915512s&link_type=abstract

American Astronomical Society, AAS Meeting #219, #155.12

Computer Science

Performance

Scientific paper

We present a new class of space-based exoplanet observatories incorporating both internal coronagraphs and external occulters, operating separately, to maximize overall mission science yield. These are shown to be particularly attractive as they can lead to simpler telescope architectures, more highly redundant systems, and can deliver comparable performance with relaxed requirements. Using an advanced mission simulation capability we evaluate the expected performance of these hybrids at multiple telescope scales and with realistic engineering constraints. We present comparisons of the expected science returns for populations of planets including Earth-like planets on habitable-zone orbits and giant planets on wider separation orbits, extrapolated from known populations from doppler surveys. Of particular interest is a hybrid scheme involving an 8 m telescope with an occulter designed for a 4 m aperture, which can be shown to outperform either 'pure' design at that scale.

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