Free Access
Issue
A&A
Volume 523, November-December 2010
Article Number A73
Number of page(s) 41
Section Stellar structure and evolution
DOI https://doi.org/10.1051/0004-6361/201014763
Published online 18 November 2010

Online material

Appendix A: Companion candidates motions on the sky

The astrometric measurements for all point sources detected at several observing epochs are represented in Fig. A.1. The background/comoving probabilities defined in Sect. 4.2 are given over each panel.

thumbnail Fig. A.1

Motions of companion candidates measured on the sky relatively to their respective primary stars (at (Δα,Δδ) = (0,0)). The theoretical motion of an object is calculated from its initial first epoch measurement (black filled circle) assuming it is a background contaminant and given the proper and parallactic motions of the primary star (black curve), for the different epochs where measurements have been recorded (empty circles). The measured positions for these different epochs are reported (filled circles) for comparison. When the measurements (filled circles) agree with the theoretical motion path, the companion candidate is likely a background contaminant.

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Appendix B: Detection limits for all stars

thumbnail Fig. B.1

Detection limits in the Ks band.

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thumbnail Fig. B.2

Detection limits in the H band.

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thumbnail Fig. B.3

Detection limits in the J band.

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Appendix C: The HD 49095 triple system

thumbnail Fig. C.1

Orbit of the binary companion to HD 49095 resolved over 3.5 yr. The blue and red dots mark the positions of CC1 and CC2, respectively, as retrieved by the deconvolution algorithm. The axes give the projected separations with respect to CC1.

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Appendix D: HD 32743 motion over 49 years

thumbnail Fig. D.1

Motion of HD 32743 (η1 Pic) CC1 on the sky considering the 1946 archive values for ρ and θ in the CCDM with arbitrary uncertainties. The filled red dot indicates the position measured in 2005. This companion candidate is considered as a probable background object.

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© ESO, 2010

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