On the Provenance of Pluto's Nitrogen (N2)

@article{Singer2015OnTP,
  title={On the Provenance of Pluto's Nitrogen (N2)},
  author={Kelsi N. Singer and Sharon A. Stern},
  journal={The Astrophysical Journal},
  year={2015},
  volume={808}
}
N2 is abundant in Pluto’s atmosphere and on its surface, but the supply is depleted by prodigious atmospheric escape. We demonstrate that cometary impacts could not have delivered enough N mass to resupply Pluto’s N2 atmospheric escape over time; thus Pluto’s N2 is likely endogenous, and therefore was either acquired early in its history or created by chemistry inside Pluto. We find that cratering could excavate a considerable amount of N2 to resupply the atmosphere against escape if the near… 
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