Communication Dans Un Congrès Année : 2024

SPINER: spectro-interferometry with echelle grating at high resolution

Résumé

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
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hal-04797228 , version 1 (22-11-2024)

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Anthony Meilland, Florentin Millour, Stéphane Lagarde, Julien Dejonghe. SPINER: spectro-interferometry with echelle grating at high resolution. Optical and Infrared Interferometry and Imaging IX, Jun 2024, YOKOHAMA, Japan. pp.116, ⟨10.1117/12.3018762⟩. ⟨hal-04797228⟩
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