integrated-optics; exoplanets; wavefront control; infrared; high contrast imaging; high angular resolution; optical fibers; long baseline interferometry
Abstract :
[en] The Very Large Telescope Interferometer is one of the most proficient observatories in the world for high angular resolution. Since its first observations, it has hosted several interferometric instruments operating in various bandwidths in the infrared. As a result, the VLTI yields countless discoveries and technological breakthroughs. We introduce to the VLTI the new concept of Asgard: an instrumental suite including four natively collaborating instruments: BIFROST, a stellar interferometer dedicated to the study of the formation of multiple systems; Hi- 5, a nulling interferometer dedicated to imaging young nearby planetary systems in the M band; HEIMDALLR, an all-in-one instrument performing both fringe tracking and stellar interferometry with the same optics; Baldr, a fibre-injection optimiser. These instruments share common goals and technologies. Thus, the idea of this suite is to make the instruments interoperable and complementary to deliver unprecedented sensitivity and accuracy from J to M bands. The interoperability of the Asgard instruments and their integration in the VLTI are the main challenges of this project. In this paper, we introduce the overall optical design of the Asgard suite, the different modules, and the main challenges ahead.
Research Center/Unit :
CSL - Centre Spatial de Liège - ULiège STAR - Space sciences, Technologies and Astrophysics Research - ULiège
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Martinod, Marc-Antoine
Defrere, Denis ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Planetary & Stellar systems Imaging Laboratory
Ireland, Michael J.
Kraus, Stefan
Martinache, Frantz
Tuthill, Peter
Bigioli, Azzurra
Bryant, Julia
Chhabra, Sorabh
Courtney-Barrer, Benjamin
Crous, Fred
Cvetojevic, Nick
Dandumont, Colin ; Université de Liège - ULiège > Unités de recherche interfacultaires > Space sciences, Technologies and Astrophysics Research (STAR)
ERC - European Research Council EU - European Union
Funding number :
866070
Funding text :
D.D. acknowledges support from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (grant agreement No. CoG - 866070). M-A.M. has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 101004719. SK and DM acknowledge support from STFC Consolidated Grant (ST/V000721/1). S.K. and S.C. acknowl- edge support from an ERC Consolidator Grant (“GAIA-BIFROST”, grant agreement No. 101003096). D.J.M. acknowleges funding from an STFC Consolidated Grant (ST/V000721/1).
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