Affordable Access

Preliminary results of dark-speckle stellar coronography

Authors
  • Boccaletti, A.
  • Labeyrie, A.
  • Ragazzoni, R.
Type
Preprint
Publication Date
Jun 10, 1998
Submission Date
Jun 10, 1998
Identifiers
arXiv ID: astro-ph/9806144
Source
arXiv
License
Unknown
External links

Abstract

The dark-speckle method (Labeyrie 1995) combines features of speckle interferometry and adaptive optics to provide images of faint circumstellar material. We present preliminary results of observations, and simulations concluding to the feasibility of exo-planet imaging from the ground. Laboratory simulations with an avalanche photodiode indicate the detectability of a stellar companion of relative intensity 10^{-6} at 5 Airy radii from the star. New, more general, expressions for the signal-to-noise ratio and integration time are given. Comparisons with direct long-exposure imaging indicate that the method improves the detectability of circumstellar nebulosity, faint companions and planets.

Report this publication

Statistics

Seen <100 times