Dark-speckle coronagraphic detection of binary stars in the near-IR

Details Dark-speckle coronagraphic detection of binary stars in the near-IR Dark-speckle coronagraphic detection of binary stars in the near-IR

Feb 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...367..371b&link_type=abstract

Astronomy and Astrophysics, v.367, p.371-380 (2001)

Physics

Optics

11

Methods: Data Analysis, Techniques: Interferometric, Instrumentation: Adaptives Optics, Binaries: Close, Planetary Systems

Scientific paper

In this paper, we present the first attempt to obtain images of binary stars in the near IR using the dark-speckle method on the 3.6 m telescope at La Silla. Promising results are presented, despite the effect of the detector high read-out noise affecting the efficiency of speckle observations. We give some comparisons with the long exposure method. We derive in these data a reliable limit of detection for binary star companions, around mK<4 stars, which is about <~ mK~ 6-7 for angular separations ranging from 0.5'' to 0.9''. Based on observations collected at the European Southern Observatory, La Silla, Chile.

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