{
  "id": "1706.10095",
  "version": "v1",
  "published": "2017-06-30T10:02:56.000Z",
  "updated": "2017-06-30T10:02:56.000Z",
  "title": "Direct evidence of multiple reservoirs of volatile nitrogen in a protosolar nebula analogue",
  "authors": [
    "Pierre Hily-Blant",
    "Victor Magalhães",
    "Joel Kastner",
    "Alexandre Faure",
    "Thierry Forveille",
    "Chunhua Qi"
  ],
  "comment": "16 pages, 25 figures, accepted for publication in Astronomy and Astrophysics Letters",
  "categories": [
    "astro-ph.GA",
    "astro-ph.EP"
  ],
  "abstract": "Isotopic ratios are keys to understanding the origin and early evolution of the solar system in the context of Galactic nucleosynthesis. The large range of measured $^{14}$N/$^{15}$N isotopic ratios in the solar system reflects distinct reservoirs of nitrogen whose origins remain to be determined. We have directly measured a C$^{14}$N/C$^{15}$N abundance ratio of 323$\\pm$30 in the disk orbiting the nearby young star TW Hya. This value, which is in good agreement with nitrogen isotopic ratios measured for prestellar cores, likely reflects the primary present-day reservoir of nitrogen in the solar neighbourhood. These results support models invoking novae as primary $^{15}$N sources as well as outward migration of the Sun over its lifetime, and suggest that comets sampled a secondary, $^{15}$N-rich reservoir during solar system formation.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-06-30T10:02:56.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "protosolar nebula analogue",
      "direct evidence",
      "multiple reservoirs",
      "support models invoking novae",
      "volatile nitrogen"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 16,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}