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M. Chella

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Open access Oct 2026

High-resolution transmission spectroscopy of KELT-18b. Metastable helium detection at 1083 nm

Exoplanets orbiting near their host stars experience intense irradiation, which can drive the expansion and escape of their upper atmospheres. The near-infrared metastable helium triplet at 1083.3 nm has emerged as a powerful diagnostic to probe these mass-loss processes. We present the first high-resolution transmissi...

M. Chella, M. Monticelli, F. Biassoni et al. · 0 citations

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