The Messenger Telescopes and Instrumentation

Peering through SPHERE Images: A Glance at Contrast Limitations

Authors
  • Cantalloube, Faustine [Max Planck Institute for Astronomy, Heidelberg, Germany]
  • Dohlen, Kjetil [Laboratoire d’Astrophysique de Marseille, Aix Marseille Université, CNRS, CNES, France]
  • Milli, Julien [European Southern Observatory (ESO)]
  • Brandner, Wolfgang [Max Planck Institute for Astronomy, Heidelberg, Germany]
  • Vigan, Arthur [Laboratoire d’Astrophysique de Marseille, Aix Marseille Université, CNRS, CNES, France]

Section
Telescopes and Instrumentation
Abstract

Various structures are visible within Spectro-Polarimetric High-contrast Exoplanet REsearch instrument (SPHERE) images that are not always straightforward to interpret. In this article we present a review of these features and demonstrate their origin using simulations. We also identify which expected or unexpected features are limiting the contrast reached by the instrument and how they may be tackled. This vision paves the way to designing a future upgrade of the SPHERE instrument and the next generation of high-contrast instruments such as those planned for the Extremely Large Telescope (ELT).


Dates
Created: 2019-06-01/2019-06-30
Length
7 pages

Cite this article:

F. Cantalloube, K. Dohlen, J. Milli, W. Brandner, A. Vigan; Peering through SPHERE Images: A Glance at Contrast Limitations. The Messenger 176 (June 2019): 25–31. https://doi.org/10.18727/0722-6691/5138