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Title: Exoplanet detection with simultaneous spectral differential imaging: effects of out-of-pupil-plane optical aberrations

Abstract

Imaging faint companions (exoplanets and brown dwarfs) around nearby stars is currently limited by speckle noise. To efficiently attenuate this noise, a technique called simultaneous spectral differential imaging (SSDI) can be used. This technique consists of acquiring simultaneously images of the field of view in several adjacent narrow bands and in combining these images to suppress speckles. Simulations predict that SSDI can achieve, with the acquisition of three wavelengths, speckle noise attenuation of several thousands. These simulations are usually performed using the Fraunhofer approximation, i.e. considering that all aberrations are located in the pupil plane. We have performed wavefront propagation simulations to evaluate how out-of-pupil-plane aberrations affect SSDI speckle noise attenuation performance. The Talbot formalism is used to give a physical insight of the problem; results are confirmed using a proper wavefront propagation algorithm. We will show that near-focal-plane aberrations can significantly reduce SSDI speckle noise attenuation performance at several {lambda}/D separation. It is also shown that the Talbot effect correctly predicts the PSF chromaticity. Both differential atmospheric refraction effects and the use of a coronagraph will be discussed.

Authors:
; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
899420
Report Number(s):
UCRL-PROC-221155
Journal ID: ISSN 0277-786X; TRN: US200708%%283
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Journal Volume: 6269; Conference: Presented at: Astonomical Telescopes and Instrumentation 2006, Orlando, FL, United States, May 24 - May 31, 2006
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; ATTENUATION; DETECTION; PERFORMANCE; REFRACTION; STARS; TELESCOPES; WAVELENGTHS

Citation Formats

Marois, C, Phillion, D W, and Macintosh, B. Exoplanet detection with simultaneous spectral differential imaging: effects of out-of-pupil-plane optical aberrations. United States: N. p., 2006. Web. doi:10.1117/12.672263.
Marois, C, Phillion, D W, & Macintosh, B. Exoplanet detection with simultaneous spectral differential imaging: effects of out-of-pupil-plane optical aberrations. United States. https://doi.org/10.1117/12.672263
Marois, C, Phillion, D W, and Macintosh, B. 2006. "Exoplanet detection with simultaneous spectral differential imaging: effects of out-of-pupil-plane optical aberrations". United States. https://doi.org/10.1117/12.672263. https://www.osti.gov/servlets/purl/899420.
@article{osti_899420,
title = {Exoplanet detection with simultaneous spectral differential imaging: effects of out-of-pupil-plane optical aberrations},
author = {Marois, C and Phillion, D W and Macintosh, B},
abstractNote = {Imaging faint companions (exoplanets and brown dwarfs) around nearby stars is currently limited by speckle noise. To efficiently attenuate this noise, a technique called simultaneous spectral differential imaging (SSDI) can be used. This technique consists of acquiring simultaneously images of the field of view in several adjacent narrow bands and in combining these images to suppress speckles. Simulations predict that SSDI can achieve, with the acquisition of three wavelengths, speckle noise attenuation of several thousands. These simulations are usually performed using the Fraunhofer approximation, i.e. considering that all aberrations are located in the pupil plane. We have performed wavefront propagation simulations to evaluate how out-of-pupil-plane aberrations affect SSDI speckle noise attenuation performance. The Talbot formalism is used to give a physical insight of the problem; results are confirmed using a proper wavefront propagation algorithm. We will show that near-focal-plane aberrations can significantly reduce SSDI speckle noise attenuation performance at several {lambda}/D separation. It is also shown that the Talbot effect correctly predicts the PSF chromaticity. Both differential atmospheric refraction effects and the use of a coronagraph will be discussed.},
doi = {10.1117/12.672263},
url = {https://www.osti.gov/biblio/899420}, journal = {},
issn = {0277-786X},
number = ,
volume = 6269,
place = {United States},
year = {Tue May 02 00:00:00 EDT 2006},
month = {Tue May 02 00:00:00 EDT 2006}
}

Conference:
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