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Differential Simultaneous Imaging and Faint Companions: TRIDENT First Results from CFHT

Published online by Cambridge University Press:  26 May 2016

Christian Marois ,
Daniel Nadeau ,
René Doyon ,
René Racine  and
Gordon A. H. Walker
Christian Marois
Affiliation:
Département de physique, Université de Montréal, C.P. 6128, Succ. A, Montréal, QC, Canada H3C 3J7
Daniel Nadeau
Affiliation:
Département de physique, Université de Montréal, C.P. 6128, Succ. A, Montréal, QC, Canada H3C 3J7
René Doyon
Affiliation:
Département de physique, Université de Montréal, C.P. 6128, Succ. A, Montréal, QC, Canada H3C 3J7
René Racine
Affiliation:
Département de physique, Université de Montréal, C.P. 6128, Succ. A, Montréal, QC, Canada H3C 3J7
Gordon A. H. Walker
Affiliation:
1234 Hewlett Place, Victoria, BC, Canada V8S 4P7

Abstract

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We present the first results obtained at CFHT with the TRIDENT infrared camera, dedicated to the detection of faint companions close to bright nearby stars. Its main feature is the acquisition of three simultaneous images in three wavelengths (simultaneous differential imaging) across the methane absorption bandhead at 1.6μm, that enables a precise subtraction of the primary star PSF while keeping the companion signal. Thirty-five stars have been observed in two observing missions, with no detection so far. It is shown that a faint companion with a ΔH of 10 magnitudes would be detected at 0.5″ from the primary.

Type
Part 6. Searches for Substellar Companions
Information
Symposium - International Astronomical Union , Volume 211: Brown Dwarfs , 2003 , pp. 275 - 278
Copyright
Copyright © Astronomical Society of the Pacific 2001 

References

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