English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Direct detection is a very promising field in exoplanet science. It allowsthe detection of companions with large separation and allows their spectralanalysis. A few planets have already been detected and are under spectralanalysis. But the full spectral characterization of smaller and colder planetsrequires higher contrast levels over large spectral bandwidths. Coronagraphscan be used to reach these contrasts, but their efficiency is limited bywavefront aberrations. These deformations induce speckles, star lights leaks,in the focal plane after the coronagraph. The wavefront aberrations should beestimated directly in the science image to avoid usual limitations bydifferential aberrations in classical adaptive optics. In this context, weintroduce the Self- Coherent Camera (SCC). The SCC uses the coherence of thestar light to produce a spatial modulation of the speckles in the focal planeand estimate the associated electric complex field. Controlling the wavefrontwith a deformable mirror, high contrasts have already been reached inmonochromatic light with this technique. The performance of the current versionof the SCC is limited when widening the spectral bandwidth. We will present atheoretical analysis of these issues and their possible solution. Finally, wewill present test bench performance in polychromatic light.

Speckle correction in polychromatic light with the self-coherent camera for the direct detection of exoplanets