SPINER: spectro-interferometry with echelle grating at high resolution

Anthony Meilland; Florentin Millour; Stéphane Lagarde; Julien Dejonghe

doi:10.1117/12.3018762

28 August 2024 SPINER: spectro-interferometry with echelle grating at high resolution

Anthony Meilland, Florentin Millour, Stéphane Lagarde, Julien Dejonghe

Proceedings Volume 13095, Optical and Infrared Interferometry and Imaging IX; 1309539 (2024) https://doi.org/10.1117/12.3018762
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

Spectro-interferometry is a powerful technique to study astrophysical objects. All modern interferometric instruments offer at least a limited spectral resolution allowing to probe geometry as the function of the wavelength. Some even offer high-enough resolutions to resolve narrow spectral features allowing to constrain physical, chemical and dynamical properties. However, due to detectors size, current instruments are either limited in term of resolution (up to 4000 for VLTI/GRAVITY to cover the full K-band) or bandwidth (20-50nm). To overcome this limitation, we started investigating the possibility of multi-order Echelle-spectro-interferometry. In such scheme, the full spectrum is divided into multiple orders dispersed perpendicularly, taking advantage of the square size of modern detectors. We are currently building a first visible prototype, allowing us to simultaneously observe the full R & I photometric bands (600-900nm) with a resolution of R=20000. We describe in this paper the instrumental concept, simulations, our first in-lab results and some driving science programs in the visible and near-infrared.

Citation Download Citation

Anthony Meilland, Florentin Millour, Stéphane Lagarde, and Julien Dejonghe "SPINER: spectro-interferometry with echelle grating at high resolution", Proc. SPIE 13095, Optical and Infrared Interferometry and Imaging IX, 1309539 (28 August 2024); https://doi.org/10.1117/12.3018762

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