27 June 2023 High-angular resolution and high contrast observations from Y to L band at the Very Large Telescope Interferometer with the Asgard Instrumental suite
Author Affiliations +
Abstract

European Southern Observatory (ESO)’s Very Large Telescope Interferometer (VLTI), Paranal, Chile, is one of the most proficient observatories in the world for high angular resolution astronomy. It has hosted several interferometric instruments operating in various bandwidths in the infrared. As a result, the VLTI has yielded countless discoveries and technological breakthroughs. We propose to ESO a new concept for a visitor instrument for the VLTI: Asgard. It is an instrumental suite comprised of four natively collaborating instruments: High-Efficiency Multiaxial Do-it ALL Recombiner (HEIMDALLR), an all-in-one instrument performing both fringe tracking and stellar interferometry with the same optics; Baldr, a Strehl optimizer; Beam-combination Instrument for studying the Formation and fundamental paRameters of Stars and planeTary systems (BIFROST), a combiner whose main science case is studying the formation processes and properties of stellar and planetary systems; and Nulling Observations of dusT and planeTs (NOTT), a nulling interferometer dedicated to imaging young nearby planetary systems in the L band. The overlap between the science cases across different spectral bands yields the idea of making the instruments complementary to deliver sensitivity and accuracy from the J to L bands. Asgard is to be set on the former AMBER optical table. Its control architecture is a hybrid between custom and ESO-compliant developments to benefit from the flexibility offered to a visitor instrument and foresee a deeper long-term integration into VLTI for an opening to the community.

© 2023 Society of Photo-Optical Instrumentation Engineers (SPIE)
Marc-Antoine Martinod, Denis Defrère, Michael J. Ireland, Stefan Kraus, Frantz Martinache, Peter G. Tuthill, Azzurra Bigioli, Emilie Bouzerand, Julia Bryant, Sorabh Chhabra, Benjamin Courtney-Barrer, Fred Crous, Nick Cvetojevic, Colin Dandumont, Steve Ertel, Tyler Gardner, Germain Garreau, Adrian M. Glauser, Lucas Labadie, Tiphaine Lagadec, Romain Laugier, Alexandra Mazzoli, Daniel J. Mortimer, Barnaby R. M. Norris, Gert Raskin, Gordon Robertson, Ahmed Sanny, and Adam Taras "High-angular resolution and high contrast observations from Y to L band at the Very Large Telescope Interferometer with the Asgard Instrumental suite," Journal of Astronomical Telescopes, Instruments, and Systems 9(2), 025007 (27 June 2023). https://doi.org/10.1117/1.JATIS.9.2.025007
Received: 6 December 2022; Accepted: 6 June 2023; Published: 27 June 2023
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CITATIONS
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KEYWORDS
Equipment

L band

Stars

Exoplanets

Astronomical interferometers

Nulling interferometry

Imaging systems

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