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Instrumentation, Mesure, Métrologie

1631-4670
Revue des Systèmes
 

 ARTICLE VOL 6/1-4 - 2006  - pp.271-276
TITLE
MATISSE. Interferometric Imaging in the Mid-Infrared

RÉSUMÉ

MATISSE est un projet d'instrument de deuxième génération pour le VLTI. Il offrira la combinaison de 4 faisceaux/télescopes dans les bandes N, L, M et Q, simultanément, et la mesure de clôture de phase qui permettra l'imagerie. L'étude des environnements circumstellaires et des poussières chaudes et de leur minéralogie seront les principaux programmes.

ABSTRACT

MATISSE ­ the Multi AperTure Mid-Infrared SpectroScopic Experiment ­ is foreseen as a mid-infrared spectro-interferometer combining the beams of up to 4 UTs/ATs of the Very Large Telescope Interferometer (VLTI). MATISSE will measure closure phase relations and thus offer an efficient capability for image reconstruction. In addition to the N band, MATISSE will open 3 new observing windows at the VLTI : the L, M, and Q band which all belong to the mid-infrared domain. Simultaneous observations in separate bands will also be possible. MATISSE will also provide several spectroscopic modes. In summary, MATISSE can be seen as a successor of MIDI by providing imaging capabilities in the entire mid-infrared accessible from the ground. The extension of MATISSE down to 2.7 µm as well as its generalisation of the use of closure phases make it also a successor of AMBER. MATISSE will overcome the ambiguities often existing in the interpretation of visibility measurements. The performance of MATISSE is partly related to the four UTs that permits to push the sensitivity limits to values required by programs such as the study of Active Galactic Nuclei and extrasolar planets. The performance of MATISSE is also linked to the availability of ATs which are relocatable in 30 different stations allowing the exploration of the Fourier plane with up to 200 meters baseline length. Key science programs using the ATs cover for example the formation and evolution of planetary systems, the birth of massive stars as well as the observation of the high-contrast environment of hot and evolved stars.

AUTEUR(S)
Sebastian WOLF, Bruno LOPEZ, MATISSE CONSORTIUM

MOTS-CLÉS
MATISSE, interférométrie, infrarouge, imagerie, spectroscopie.

KEYWORDS
MATISSE, interferometry, infrared, imaging, spectroscopy.

LANGUE DE L'ARTICLE
Anglais

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