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Coronagraphs adapted to atmosphere conditions

Abstract: In this paper we show new ways to improve the performance of ground-based coronagraphy. We introduce adaptive coronagraphic masks whose profile is a binary version of the instantaneous atmospherically degraded star image. We also propose the hyper-Gaussian profile masks obtained by averaging adaptive masks. In addition, adaptive Lyot stops and hyper-Gaussian Lyot stops are analyzed. Computer simulations show that all these masks outperform the circular hard-edged mask and that a proper mask and stop combination significantly reduces the angular separation at which a faint companion can be detected.

 Autoría: Cagigas M.A., Valle P.J., Cagigal M.P.,

 Fuente: Optics Express Vol. 20, Issue 4, pp. 4574-4582 (2012)

 Año de publicación: 2012

 Nº de páginas: 9

 Tipo de publicación: Artículo de Revista

 DOI: 10.1364/OE.20.004574

 ISSN: 1094-4087

 Proyecto español: AYA2010-19506

 Url de la publicación: https://doi.org/10.1364/OE.20.004574