Joint speckle-atmosphere retrievals on JWST spectra of HD 19467 B and a field T dwarf detect H2O, CH4, CO, CO2 and NH3, yield carbon isotopic ratios of 154 and 85 respectively, and show near-solar metallicity with subsolar C/O.
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Simulations show LIFE could use 25-80 m baselines or discrete values with under 10% loss in planet yield and fringe tracking.
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JWST high-contrast spectroscopy with speckle modelling: Atmospheric retrievals of the T dwarf companion HD 19467 B
Joint speckle-atmosphere retrievals on JWST spectra of HD 19467 B and a field T dwarf detect H2O, CH4, CO, CO2 and NH3, yield carbon isotopic ratios of 154 and 85 respectively, and show near-solar metallicity with subsolar C/O.
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A preliminary exploration of the effects of baseline length for the LIFE space mission
Simulations show LIFE could use 25-80 m baselines or discrete values with under 10% loss in planet yield and fringe tracking.