FastChem 4 adds a multidimensional Newton solver, logarithmic element densities, adaptive regularization for condensates, and an expanded database of 800 gas species and 511 condensates across 44 elements, yielding improved convergence and new condensation sequences for solar and carbon-rich cases.
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The ROXs 12 system shows 12CO/13CO ratios of 77 and 55 in the star and companion, with a C/O ratio of 0.54 in the companion.
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FastChem 4: New chemical elements and improved convergence behaviour
FastChem 4 adds a multidimensional Newton solver, logarithmic element densities, adaptive regularization for condensates, and an expanded database of 800 gas species and 511 condensates across 44 elements, yielding improved convergence and new condensation sequences for solar and carbon-rich cases.
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The ESO SupJup Survey. X. A carbon isotope contrast in the young ROXs 12 system
The ROXs 12 system shows 12CO/13CO ratios of 77 and 55 in the star and companion, with a C/O ratio of 0.54 in the companion.