1 September 2017 Prospects for exoplanet imaging in multi-star systems with starshades
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Abstract
We explore the capabilities of a starshade mission to directly image multi-star systems. In addition to the diffracted and scattered light for the on-axis star, a multi-star system features additional starlight leakage from the off-axis star that must also be controlled. A basic option is for additional starshades to block the off- axis stars. An interesting option takes the form of hybrid operation of a starshade in conjunction with an internal starlight suppression. Two hybrid scenarios are considered. One such scenario includes the coronagraph instrument blocking the on-axis star, with the starshade blocking off-axis starlight. Another scenario uses the wavefront control system in the coronagraph instrument and using a recent Super-Nyquist Wavefront Control (SNWC) technique can remove the off-axis stars leakage to enable a region of high-contrast around the on-axis star blocked by the starshade. We present simulation results relevant for the WFIRST telescope.
Conference Presentation
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Dan Sirbu, Dan Sirbu, Ruslan Belikov, Ruslan Belikov, Eduardo Bendek, Eduardo Bendek, Elias Holte, Elias Holte, A. J. Riggs, A. J. Riggs, Stuart Shaklan, Stuart Shaklan, } "Prospects for exoplanet imaging in multi-star systems with starshades", Proc. SPIE 10400, Techniques and Instrumentation for Detection of Exoplanets VIII, 104001D (1 September 2017); doi: 10.1117/12.2274267; https://doi.org/10.1117/12.2274267
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