Direct Imaging of Exoplanets and Brown Dwarfs with the VLT: NACO Pupil-stabilised Lyot Coronagraphy at 4 µm

Details Direct Imaging of Exoplanets and Brown Dwarfs with the VLT: NACO Pupil-stabilised Lyot Coronagraphy at 4 µm Direct Imaging of Exoplanets and Brown Dwarfs with the VLT: NACO Pupil-stabilised Lyot Coronagraphy at 4 µm

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009msngr.137....8k&link_type=abstract

The Messenger, vol. 137, p. 8-13

Physics

Optics

4

Scientific paper

NACO is the versatile adaptive optics assisted near-infrared instrument at the VLT. Among its many modes it offers spectral differential imaging that efficiently enhances the contrast in searches for faint companions. Recently, an additional method to calibrate quasi-static speckles through angular differential imaging has been developed, offering the option to operate NACO in a pupil-tracking mode. Using this new mode, in combination with Lyot coronagraphy and an optimal choice of observing wavelength in the thermal infrared around 4 µm, allows NACO to reach unprecedented sensitivities for masses of companions for all but the hottest exoplanets, beginning to open up the mass domain targeted by future instruments such as SPHERE.

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