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Performance and Early Science with the Subaru Coronagraphic Extreme Adaptive Optics Project
Thayne Currie, Olivier Guyon, Julien Lozi +9
We describe the current performance of the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument on the Subaru telescope on Maunakea, Hawaii and present early science re…
Efficient wavefront sensing for space-based adaptive optics
He Sun, N. Jeremy Kasdin, Robert Vanderbei
Future large space telescopes will be equipped with adaptive optics (AO) to overcome wavefront aberrations and achieve high contrast for imaging faint astronomical objects, such as…
Reduced Order Estimation of the Speckle Electric Field History for Space-Based Coronagraphs
Leonid Pogorelyuk, N. Jeremy Kasdin, Clarence W. Rowley
In high-contrast space-based coronagraphs, one of the main limiting factors for imaging the dimmest exoplanets is the time varying nature of the residual starlight (speckles). Mode…
No Clear, Direct Evidence for Multiple Protoplanets Orbiting LkCa 15: LkCa 15 bcd are Likely Inner Disk Signals
Thayne Currie, Christian Marois, Lucas Cieza +29
Two studies utilizing sparse aperture masking (SAM) interferometry and differential imaging have reported multiple jovian companions around the young solar-mass star, L…
The Critical, Strategic Importance of Adaptive Optics-Assisted Ground-Based Telescopes for the Success of Future NASA Exoplanet Direct Imaging Missions
Thayne Currie, Ruslan Belikov, Olivier Guyon +18
Ground-based telescopes coupled with adaptive optics (AO) have been playing a leading role in exoplanet direct imaging science and technological development for the past two decade…
Dark Hole Maintenance and A Posteriori Intensity Estimation in the Presence of Speckle Drift in a High-Contrast Space Coronagraph
Leonid Pogorelyuk, N. Jeremy Kasdin
Direct exoplanet imaging via coronagraphy requires maintenance of high contrast in a dark hole for lengthy integration periods. Wavefront errors that change slowly over that time a…