Issue |
A&A
Volume 367, Number 1, February III 2001
|
|
---|---|---|
Page(s) | 371 - 380 | |
Section | Numerical methods and codes | |
DOI | https://doi.org/10.1051/0004-6361:20000342 | |
Published online | 15 February 2001 |
Dark-speckle coronagraphic detection of binary stars in the near-IR*
1
GPS - CalTech Pasadena, CA, USA e-mail: boccalet@gps.caltech.edu
2
ESO Santiago, Chile e-mail: cmoutou@eso.org
3
LAOG, Laboratoire d'Astrophysique de Grenoble, France e-mail: mouillet@obs.ujf-grenoble.fr; lagrange@obs.ujf-grenoble.fr; augereau@obs.ujf-grenoble.fr
A. Boccaletti
Received:
13
June
2000
Accepted:
28
November
2000
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 stars, which is about for angular separations ranging from to .
Key words: methods: data analysis / techniques: interferometric / instrumentation: adaptives optics / binaries: close / planetary systems
© ESO, 2001
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