Achromatic Interfero Coronagraphy: a future on VLT

Details Achromatic Interfero Coronagraphy: a future on VLT Achromatic Interfero Coronagraphy: a future on VLT

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001sf2a.conf..493g&link_type=abstract

Abstracts from SF2A-2001: Semaine de l'Astrophysique Francaise, meeting held in Lyon, France, May 28-June 1st, 2001, Eds.: F. Co

Physics

Optics

Scientific paper

The Achromatic Interfero Coronagraph (AIC) developed at Observatoire de la Côte d'Azur uses a destructive interference process (nulling) on a single aperture instrument. A Pi phase difference is introduced by passing through a focal plane in one arm of the interferometer. IAC is currently used at CFHT observatory in K band. An improved version will be proposed to benefit from the potentiality of the VLT equipped with the NAOS adaptive optics and the camera CONICA, extending the extinction capabilities to L and M bands. Since the IAC works in several spectral bands at the same time, it can detect "warm Jupiter" like planets around close stars, by subtracting residual speckles with the Racine's method, only rigorous with IAC.

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