Limits of Adaptive Optics for high contrast imaging

Abstract

The effects of photon noise, aliasing, wavefront chromaticity and scintillation on the point spread function (PSF) contrast achievable with ground based adaptive optics (AO) are evaluated for different wavefront sensing schemes. I show that a wavefront sensor (WFS) based upon the Zernike phase contrast technique offers the best sensitivity to photon noise at all spatial frequencies, while the Shack-Hartmann WFS is significantly less sensitive. In AO systems performing wavefront sensing in the visible and scientific imaging in the near-IR, the PSF contrast limit is set by the scintillation chromaticity induced by Fresnel propagation through the atmosphere. On a 8m telescope, the PSF contrast is then limited to 1e-4 to 1e-5 in the central arcsecond. Wavefront sensing and scientific imaging should therefore be done at the same wavelength, in which case, on bright sources, PSF contrasts between 1e-6 and 1e-7 can be achieved within 1 arcsecond on a 8m telescope in optical/near-IR. The impact of atmospheric turbulence parameters (seeing, wind speed, turbulence profile) on the PSF contrast is quantified. I show that a focal plane wavefront sensing scheme offers unique advantages, and I discuss how to implement it. Coronagraphic options are also briefly discussed.

31 pages, 17 figures, published in ApJ. Updated on Sep 29, 2005: Corrected error in equ. (29) and changed figures accordingly (thanks to T. Fusco for spotting the mistake)

References in corpus (5)

• High Dynamic Range Imaging Using a Deformable Mirror for Space Coronography
• Exoplanets imaging with a Phase-Induced Amplitude Apodization Coronagraph - I. Principle
• Imaging extrasolar planets by stellar halo suppression in separately-corrected color bands
• Ground-based near-infrared imaging of the HD141569 circumstellar disk
• Notch Filter Masks: Practical Image Masks for Planet-Finding Coronagraphs

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