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Experimental validation of Lyot stop apodization in ground-based coronagraphy

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.

 Autoría: Cagigas M.A., Valle P.J., Cagigal M.P., Prieto-Blanco X., Pérez-Garrido A., Villo-Pérez I., Femenía B., Pérez-Prieto J.A., Rodríguez L.F., López R., Oscoz A., Rebolo R.,

 Fuente: Monthly notices of the Royal Astronomical Society, vol. 446, iss. 1, Pp 627–632 (2015)

 Editorial: Oxford University Press

 Fecha de publicación: 01/01/2015

 Nº de páginas: 6

 Tipo de publicación: Artículo de Revista

 DOI: 10.1093/mnras/stu2071

 ISSN: 0035-8711,1365-2966

 Proyecto español: FIS2012-31079

 Url de la publicación: https://doi.org/10.1093/mnras/stu2071

Autoría

MIGUEL ANGEL CAGIGAS GARCIA

PRIETO-BLANCO, XESÚS

PÉREZ-GARRIDO, ANTONIO

VILLO-PÉREZ, ISIDRO

FEMENÍA, B.

PÉREZ-PRIETO, J. A.

RODRÍGUEZ, L. F.

LÓPEZ, R.

OSCOZ, A.

REBOLO, R.