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

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

2002-11-28

arxiv.org/abs/astro-ph/0211635v1

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure, to appear in IAU Symposium, Vol. 211, E. L. Martin, ed

Scientific paper

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 1.6 micron, 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 DeltaH of 10 magnitudes would be detected at 0.5 arcsec from the primary.

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