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dc.contributor.authorDefrère, D
dc.contributor.authorAbsil, O
dc.contributor.authorBerger, JP
dc.contributor.authorBoulet, T
dc.contributor.authorDanchi, WC
dc.contributor.authorErtel, S
dc.contributor.authorGallenne, A
dc.contributor.authorHénault, F
dc.contributor.authorHinz, P
dc.contributor.authorHuby, E
dc.contributor.authorIreland, M
dc.contributor.authorKraus, S
dc.contributor.authorLabadie, L
dc.contributor.authorLe Bouquin, JB
dc.contributor.authorMartin, G
dc.contributor.authorMatter, A
dc.contributor.authorMérand, A
dc.contributor.authorMennesson, B
dc.contributor.authorMinardi, S
dc.contributor.authorMonnier, JD
dc.contributor.authorNorris, B
dc.contributor.authorde Xivry, GO
dc.contributor.authorPedretti, E
dc.contributor.authorPott, JU
dc.contributor.authorReggiani, M
dc.contributor.authorSerabyn, E
dc.contributor.authorSurdej, J
dc.contributor.authorTristram, KRW
dc.contributor.authorWoillez, J
dc.date.accessioned2018-10-08T13:51:15Z
dc.date.issued2018-06-20
dc.description.abstractThe development of high-contrast capabilities has long been recognized as one of the top priorities for the VLTI. As of today, the VLTI routinely achieves contrasts of a few 10− 3in the near-infrared with PIONIER (H band) and GRAVITY (K band). Nulling interferometers in the northern hemisphere and non-redundant aperture masking experiments have, however, demonstrated that contrasts of at least a few 10− 4are within reach using specific beam combination and data acquisition techniques. In this paper, we explore the possibility to reach similar or higher contrasts on the VLTI. After reviewing the state-of-the-art in high-contrast infrared interferometry, we discuss key features that made the success of other high-contrast interferometric instruments (e.g., integrated optics, nulling, closure phase, and statistical data reduction) and address possible avenues to improve the contrast of the VLTI by at least one order of magnitude. In particular, we discuss the possibility to use integrated optics, proven in the near-infrared, in the thermal near-infrared (L and M bands, 3-5 (Formula presented.)m), a sweet spot to image and characterize young extra-solar planetary systems. Finally, we address the science cases of a high-contrast VLTI imaging instrument and focus particularly on exoplanet science (young exoplanets, planet formation, and exozodiacal disks), stellar physics (fundamental parameters and multiplicity), and extragalactic astrophysics (active galactic nuclei and fundamental constants). Synergies and scientific preparation for other potential future instruments such as the Planet Formation Imager are also briefly discussed. This project is called Hi-5 for High-contrast Interferometry up to 5 μm.en_GB
dc.description.sponsorshipThe authors acknowledge the support from the H2020 OPTICON Joint Research Network. DD and OA thank the Belgian national funds for scientific research (FNRS). SK acknowledges support from an ERC Starting Grant (Grant Agreement No. 639889) and STFC Rutherford Fellowship (ST/J004030/1).en_GB
dc.identifier.citationPublished online 20 June 2018en_GB
dc.identifier.doi10.1007/s10686-018-9593-2
dc.identifier.urihttp://hdl.handle.net/10871/34227
dc.language.isoenen_GB
dc.publisherSpringer Verlagen_GB
dc.rights.embargoreasonUnder embargo until 20 June 2019 in compliance with publisher policyen_GB
dc.rights© Springer Science+Business Media B.V., part of Springer Nature 2018en_GB
dc.subjectInfrared interferometryen_GB
dc.subjectIntegrated opticsen_GB
dc.subjectVLTIen_GB
dc.subjectHi-5en_GB
dc.subjectPFIen_GB
dc.subjectExoplaneten_GB
dc.subjectExozodiacal dusten_GB
dc.subjectAGNen_GB
dc.titleThe path towards high-contrast imaging with the VLTI: the Hi-5 projecten_GB
dc.typeArticleen_GB
dc.identifier.issn0922-6435
dc.descriptionThis is the author accepted manuscript. The final version is available from Springer Verlag via the DOI in this recorden_GB
dc.identifier.journalExperimental Astronomyen_GB


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