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[en] We report the first near-IR polar-interferometric observations, performed at the IOTA array using its integrated optics combiner IONIC. Fringes have been obtained on calibration stars and resolved late-type giants. Optical modeling of the array and dedicated laboratory measures allowed us to confirm the good accuracy obtained on the calibrated polarized visibilities and closure phases. However, no evidences for polarimetric features at high angular resolution have been detected. The simulations and the results presented here open several perspectives for polar-interferometry, especially in the context of fibered, single-mode combiners.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Le Bouquin, Jean-Baptiste; European Southern Observatory (Chile)
Rousselet-Perraut, Karine; Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Berger, Jean-Philippe; Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Herwats, Emilie ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Benisty, Myriam; Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Absil, Olivier ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Defrere, Denis ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe d'astrophysique des hautes énergies (GAPHE)
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