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dc.contributor.authorPluzhnik, E.
dc.contributor.authorLozi, J.
dc.contributor.authorBelikov, R.
dc.contributor.authorSirbu, D.
dc.contributor.authorBendek, E.
dc.contributor.authorGuyon, O.
dc.contributor.authorFogarty, K.
dc.date.accessioned2021-11-29T20:24:54Z
dc.date.available2021-11-29T20:24:54Z
dc.date.issued2021
dc.identifier.citationPluzhnik, E., Lozi, J., Belikov, R., Sirbu, D., Bendek, E., Guyon, O., & Fogarty, K. (2021). Multi-star wavefront control with SCExAO instrument: Demonstration with an internal source. Proceedings of SPIE - The International Society for Optical Engineering.
dc.identifier.isbn9781510644847
dc.identifier.issn0277-786X
dc.identifier.doi10.1117/12.2594942
dc.identifier.urihttp://hdl.handle.net/10150/662395
dc.description.abstractAlthough only a small fraction of currently known exoplanets was found in binary and multiple systems, studies show that such stars do form planets, with an efficiency that is smaller, but within an order of magnitude of single stars. However, binaries are rarely considered as targets for exoplanet imaging space missions because of challenges of removing light from the second binary component. In our previous works it was shown how to solve two main issues that make exoplanet imaging in multiple systems impossible, namely, the mutual incoherence of speckles created by different binary components, and inability of a deformable mirror (DM) to control the starlight beyond the DM outer working angle/Nyquist limit. Feasibility of the developed Multi-Star Wavefront Control (MSWC) and Super-Nyquist Wavefront Control (SNWC) algorithms was demonstrated at the Ames Coronagraph Experiment (ACE) laboratory using a simple imaging system with a DM and no coronagraph. In this paper, we report the results our MSWC experiments using the Subaru Coronagraphic Extreme Adap-Tive Optics (SCExAO) instrument that is part of our technology development effort. The main goal of these experiments is to validate MSWC on a real coronagraphic system by using an internal source to simulate at least one real representative binary target. In our demonstration narrow-band contrast of 4.1 × 10-6 has been reached by using MSWC in a 12 × 6λ/D dark zone separated from the primary component of the simulated binary star (STF 3121 AB) by 4λ/D. This contrast is better by a factor of 13.2 than the contrast floor reached by standard single-star wavefront control (SSWC). We also discuss the main limiting factors that affect the MSWC performance in our experiments. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
dc.language.isoen
dc.publisherSPIE
dc.rightsCopyright © 2021 SPIE.
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectCoronagraphy
dc.subjectExoplanets
dc.subjectMulti-Star Wavefront Control
dc.titleMulti-star wavefront control with SCExAO instrument: Demonstration with an internal source
dc.typeProceedings
dc.typetext
dc.contributor.departmentUniversity of Arizona
dc.identifier.journalProceedings of SPIE - The International Society for Optical Engineering
dc.description.noteImmediate access
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
dc.eprint.versionFinal published version
dc.source.journaltitleProceedings of SPIE - The International Society for Optical Engineering
refterms.dateFOA2021-11-29T20:24:54Z


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