A dual-mask coronagraph for observing faint companions to binary stars

Eric Cady; Michael McElwain; N. Jeremy Kasdin; Christian Thalmann

doi:10.1086/659038

A dual-mask coronagraph for observing faint companions to binary stars

Eric Cady, Michael McElwain, N. Jeremy Kasdin, Christian Thalmann

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Observations of binary stars for faint companions with conventional coronagraphic methods are challenging, as both targets will be bright enough to obscure any nearby faint companions if their scattered light is not suppressed. We propose coronagraphic examination of binary stars using an apodized-pupil Lyot coronagraph and a pair of actively controlled image-plane masks to suppress both stars simultaneously. The performance is compared with imaging with a band-limited mask, a dual-mask Lyot coronagraph, and no coronagraph at all. An imaging procedure and control system for the masks are also described.

Original language	English (US)
Pages (from-to)	333-340
Number of pages	8
Journal	Publications of the Astronomical Society of the Pacific
Volume	123
Issue number	901
DOIs	https://doi.org/10.1086/659038
State	Published - Mar 2011

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/659038

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abstract = "Observations of binary stars for faint companions with conventional coronagraphic methods are challenging, as both targets will be bright enough to obscure any nearby faint companions if their scattered light is not suppressed. We propose coronagraphic examination of binary stars using an apodized-pupil Lyot coronagraph and a pair of actively controlled image-plane masks to suppress both stars simultaneously. The performance is compared with imaging with a band-limited mask, a dual-mask Lyot coronagraph, and no coronagraph at all. An imaging procedure and control system for the masks are also described.",

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AU - Thalmann, Christian

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AB - Observations of binary stars for faint companions with conventional coronagraphic methods are challenging, as both targets will be bright enough to obscure any nearby faint companions if their scattered light is not suppressed. We propose coronagraphic examination of binary stars using an apodized-pupil Lyot coronagraph and a pair of actively controlled image-plane masks to suppress both stars simultaneously. The performance is compared with imaging with a band-limited mask, a dual-mask Lyot coronagraph, and no coronagraph at all. An imaging procedure and control system for the masks are also described.

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A dual-mask coronagraph for observing faint companions to binary stars

Abstract

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