Scintillation effects on a high-contrast imaging instrument for direct detection of exoplanets

Physics – Optics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Scientific paper

A study of the scintillation effects on the PSF halo of the high-contrast imaging instrument (CHEOPS) for direct exo-planet detection from the ground is presented. The fundamental goal of our analysis is to quantify the perturbations induced by the amplitude (scintillation) variations compared to those induced by the phase variations of a perturbed wavefront. Simulations of amplitude and phase screens are obtained for different seeing conditions and for a wavefront propagating at different zenith angles. For all cases a set of simulations of the PSFs in the ideal mirror-limited case (perfect AO-system) and an estimation of the detection limit Δm vs. angular separation obtained with and without scintillation are presented. The whole study is made in I-band (λ = 0.9 μm) i.e. the centered wavelength of the CHEOPS polarimetric imager. A maximum loss of contrast (obtained with and without scintillation) of ~ 25% over a FOV of 5 arcsec is found in the speckle noise-limited regime and of ~ 18% in the photon noise-limited regime. Results are discussed and conditions in which the scintillation effects cannot be neglected are investigated.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Scintillation effects on a high-contrast imaging instrument for direct detection of exoplanets does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Scintillation effects on a high-contrast imaging instrument for direct detection of exoplanets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scintillation effects on a high-contrast imaging instrument for direct detection of exoplanets will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1809392

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.