Imaging The Exoplanets In HR8799 With A Vector Vortex Coronagraph On The Palomar 1.5 M Diameter Well-corrected Subaperture

Details Imaging The Exoplanets In HR8799 With A Vector Vortex Coronagraph On The Palomar 1.5 M Diameter Well-corrected Subaperture Imaging The Exoplanets In HR8799 With A Vector Vortex Coronagraph On The Palomar 1.5 M Diameter Well-corrected Subaperture

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21537706s&link_type=abstract

American Astronomical Society, AAS Meeting #215, #377.06; Bulletin of the American Astronomical Society, Vol. 42, p.587

Physics

Optics

2

Scientific paper

The imaging of faint planets near bright stars requires the development of high-contrast detection techniques, and we have been developing both of the necessary aspects - precise wavefront control and small IWA coronagraphs - for use on our extreme adaptive optics (ExAO) level "well-corrected subaperture” on the Palomar Hale telescope. Specifically, we have implemented the modified Gerchberg-Saxton algorithm to reduce non-common path speckles, have employed the locally optimized combination of images (LOCI) algorithm for point spread function subtraction, have implemented upgrades to the post-AO pointing and focus to stably center the starlight on our coronagraphic masks, and have implemented a vector vortex coronagraph to reach very small inner working angles. Using our upgraded system, we have recently imaged all three of HR8799's planets with a telescope subaperture only 1.5 m in diameter. Our detections illustrate the importance of all of the enabling technical advances, and also highlight the promise of future high-contrast ExAO systems, both on the ground and in space.

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