New constraints on the delivery of cometary water and nitrogen to Earth from the 15N/14N isotopic ratio

  title={New constraints on the delivery of cometary water and nitrogen to Earth from the 15N/14N isotopic ratio},
  author={D. Hutsem'ekers and J. Manfroid and E. Jehin and C. Arpigny},
  • D. Hutsem'ekers, J. Manfroid, +1 author C. Arpigny
  • Published 2009
  • Environmental Science, Physics
  • Icarus
  • Abstract New independent constraints on the amount of water delivered to Earth by comets are derived using the 15N/14N isotopic ratio, measured to be roughly twice as high in cometary CN and HCN as in the present Earth. Under reasonable assumptions, we find that no more than a few percent of Earth’s water can be attributed to comets, in agreement with the constraints derived from D/H. Our results also suggest that a significant part of Earth’s atmospheric nitrogen might come from comets. Since… CONTINUE READING
    18 Citations

    Figures from this paper.

    Late Delivery of Nitrogen to the Earth
    • 2
    • PDF
    Isotopic constraints on the source of Pluto’s nitrogen and the history of atmospheric escape
    • 4
    A compound model for the origin of Earth's water
    • 51
    • PDF
    Isotopic ratios of H, C, N, O, and S in comets C/2012 F6 (Lemmon) and C/2014 Q2 (Lovejoy)
    • 39
    • PDF
    2.4 – Planet Formation
    • 3
    Degassing History of Earth
    • 9


    Isotopic abundances of carbon and nitrogen in jupiter-family and oort cloud comets
    • 42
    • PDF
    The CN isotopic ratios in comets
    • 78
    • PDF
    Large Excess of Heavy Nitrogen in Both Hydrogen Cyanide and Cyanogen from Comet 17P/Holmes
    • 102
    • PDF
    A determination of the HDO/H2O ratio in comet C/1995 O1 (Hale-Bopp).
    • 219
    Anomalous Nitrogen Isotope Ratio in Comets
    • 103
    The Late Asteroidal and Cometary Bombardment of Earth as Recorded in Water Deuterium to Protium Ratio
    • 90
    • Highly Influential
    • PDF
    Isotopic Compositions of Cometary Matter Returned by Stardust
    • 303
    • PDF
    From the interstellar medium to planetary atmospheres via comets
    • 12
    • Highly Influential
    Origin of the ocean on the Earth : Early evolution of water D/H in a hydrogen-rich atmosphere
    • 76
    • Highly Influential
    • PDF
    Origin of water in the terrestrial planets
    • 122
    • Highly Influential
    • PDF