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PLANETARY ATMOSPHERES

Renovation by late nebular accretion

Secondary gas disks around main sequence stars may regenerate planetary atmospheres, potentially transforming desiccated rocky worlds into gas-enveloped sub-Neptunes that feature high metallicities and enhanced atmospheric C/O ratios.

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Fig. 1: The expected C/O ratio of secondary atmospheres accrued from gas disks generated by planetesimal collisions.

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Correspondence to Eve J. Lee.

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Lee, E.J. Renovation by late nebular accretion. Nat Astron 4, 737–738 (2020). https://doi.org/10.1038/s41550-020-1122-3

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