Thermal instability triggers cyclic MRI activity in protoplanetary disks, enabling dust self-accumulation and planetesimal formation near 1 au with enough mass for multiple super-Earths.
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Planets of 0.8 Earth radii and larger retain atmospheres over multi-gigayear timescales in the habitable zone under default stagnant-lid conditions, while smaller ones lose them, with initial carbon inventory as the dominant control.
citing papers explorer
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Thermal instability and rocky planetesimal formation in the inner regions of protoplanetary disks
Thermal instability triggers cyclic MRI activity in protoplanetary disks, enabling dust self-accumulation and planetesimal formation near 1 au with enough mass for multiple super-Earths.
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Smaller Than Earth Habitability Model (STEHM): The Lower Size Limit for Atmosphere Retention in the Habitable Zone
Planets of 0.8 Earth radii and larger retain atmospheres over multi-gigayear timescales in the habitable zone under default stagnant-lid conditions, while smaller ones lose them, with initial carbon inventory as the dominant control.