Experimental validation of Lyot stop apodization in ground-based coronagraphy

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URI: http://hdl.handle.net/10902/10543
ISSN: 0035-8711
ISSN: 1365-2966
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Autoría
Cagigas García, Miguel ÁngelAutoridad Unican; Valle Herrero, Pedro JoséAutoridad Unican; Pérez Cagigal, ManuelAutoridad Unican; Prieto-Blanco, Xesús; Pérez-Garrido, Antonio; Villó Pérez, Isidro; Femenía, B.; Pérez-Prieto, J. A.; Rodríguez, L. F.; López, R.; Oscoz, A.; Rebolo López, Rafael
Fecha
2015-01
Derechos
This article has been accepted for publication in Monthly notices of the Royal Astronomical Society. © 2014 The authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
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Monthly notices of the Royal Astronomical Society, vol. 446, iss. 1, Pp 627–632 (2015)
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Oxford University Press
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Resumen/Abstract
ABSTRACT We show that the use of apodizing functions at the coronagraph Lyot plane may be useful for improving the image contrast of ground-based coronagraphs. An experimental set-up consisting of a tip–tilt mirror, a coronagraph and a low-noiseEMCCDcamerawas implemented at theWilliam Herschel Telescope. Images were taken in the I band, which meant that the D/r0 value was around 10. Experimental results confirm that, for moderately aberrated wavefronts, our instrument works as theoretically expected, and that the contrast value attained is high enough to provide direct detection of faint companions.
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