Reduced Order Estimation of the Speckle Electric Field History for Space-Based Coronagraphs
arXiv:1907.01801 · doi:10.3847/1538-4357/ab2ecf
Abstract
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). Modern methods try to differentiate between the intensities of starlight and other sources, but none incorporate models of space-based systems which can take into account actuations of the deformable mirrors. Instead, we propose formulating the estimation problem in terms of the electric field while allowing for dithering of the deformable mirrors. Our reduced-order approach is similar to intensity-based PCA (e.g. KLIP) although, under certain assumptions, it requires a considerably lower number of modes of the electric field. We illustrate this by a FALCO simulation of the WFIRST hybrid Lyot coronagraph.
arXiv comment11 pages, 3 figures
References in corpus (21)
- Angular Differential Imaging: a Powerful High-Contrast Imaging Technique
- Detection and Characterization of Exoplanets and Disks using Projections on Karhunen-Loeve Eigenimages
- A new algorithm for point spread function subtraction in high-contrast imaging: a demonstration with angular differential imaging
- PynPoint: An Image Processing Package for Finding Exoplanets
- Imaging Spectroscopy for Extrasolar Planet Detection
- Limits of Adaptive Optics for high contrast imaging
- 55 Cancri (Copernicus): A Multi-Planet System with a Hot Super-Earth and a Jupiter Analogue
- Review of small-angle coronagraphic techniques in the wake of ground-based second-generation adaptive optics systems
- Fundamental limitations on Earth-like planet detection with Extremely Large Telescopes
- Non-negative Matrix Factorization: Robust Extraction of Extended Structures
- Kernel-Phase in Fizeau Inteferometry
- Low-rank plus sparse decomposition for exoplanet detection in direct-imaging ADI sequences. The LLSG algorithm
- First On-Sky High Contrast Imaging with an Apodizing Phase Plate
- Technology advancement of the CCD201-20 EMCCD for the WFIRST coronagraph instrument: sensor characterization and radiation damage
- Artificial incoherent speckles enable precision astrometry and photometry in high-contrast imaging
- Focal Plane Wavefront Sensing using Residual Adaptive Optics Speckles
- Linear and Bayesian Planet Detection Algorithms for the Terrestrial Planet Finder
- S4: A Spatial-Spectral model for Speckle Suppression
- Dark Hole Maintenance and A Posteriori Intensity Estimation in the Presence of Speckle Drift in a High-Contrast Space Coronagraph
- WFIRST Coronagraph Technology Requirements: Status Update and Systems Engineering Approach
- Fast Linearized Coronagraph Optimizer (FALCO) IV. Coronagraph design survey for obstructed and segmented apertures