Hydrodynamic escape of nitrogen from Pluto

Details Hydrodynamic escape of nitrogen from Pluto Hydrodynamic escape of nitrogen from Pluto

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3218201t&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 18, CiteID L18201

Physics

8

Atmospheric Composition And Structure: Evolution Of The Atmosphere (1610, 8125), Atmospheric Composition And Structure: Planetary Atmospheres (5210, 5405, 5704), Planetary Sciences: Solid Surface Planets: Atmospheres (0343, 1060), Planetary Sciences: Solar System Objects: Pluto And Satellites

Scientific paper

Hydrodynamic escape of nitrogen from Pluto is studied by solving time-dependent hydrodynamic escape equations that treat the spatial distribution of EUV energy deposition realistically. Simulations show that the N2 hydrodynamic escape rate is ~1 × 1028 molecules s-1 when Pluto is at 40 AU (its average orbital location) and solar activity level is at minimum. The N2 hydrodynamic escape rate is ~2 × 1028 molecules s-1 when Pluto is at its perihelion (30 AU) and solar activity level is at maximum. Through hydrodynamic escape, Pluto may have lost ~0.5% of its total mass over the age of the solar system. Comet-like interactions may occur between Pluto's atmosphere and the solar wind flow, which may be observed by the New Horizon mission.

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