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Isotopes of nitrogen on Mars: Atmospheric measurements by Curiosity's mass spectrometer.
Wong, Michael H; Atreya, Sushil K; Mahaffy, Paul N; Franz, Heather B; Malespin, Charles; Trainer, Melissa G; Stern, Jennifer C; Conrad, Pamela G; Manning, Heidi L K; Pepin, Robert O; Becker, Richard H; McKay, Christopher P; Owen, Tobias C; Navarro-González, Rafael; Jones, John H; Jakosky, Bruce M; Steele, Andrew.
Afiliação
  • Wong MH; Department of Atmospheric, Oceanic, and Space Sciences, University of Michigan Ann Arbor, Michigan, USA ; Astronomy Department, University of California Berkeley, California, USA.
  • Atreya SK; Department of Atmospheric, Oceanic, and Space Sciences, University of Michigan Ann Arbor, Michigan, USA.
  • Mahaffy PN; Code 699, NASA Goddard Space Flight Center Greenbelt, Maryland, USA.
  • Franz HB; Code 699, NASA Goddard Space Flight Center Greenbelt, Maryland, USA.
  • Malespin C; Code 699, NASA Goddard Space Flight Center Greenbelt, Maryland, USA.
  • Trainer MG; Code 699, NASA Goddard Space Flight Center Greenbelt, Maryland, USA.
  • Stern JC; Code 699, NASA Goddard Space Flight Center Greenbelt, Maryland, USA.
  • Conrad PG; Code 699, NASA Goddard Space Flight Center Greenbelt, Maryland, USA.
  • Manning HL; Department of Physics, Concordia College Moorhead, Minnesota, USA.
  • Pepin RO; School of Physics and Astronomy, University of Minnesota Minneapolis, Minnesota, USA.
  • Becker RH; School of Physics and Astronomy, University of Minnesota Minneapolis, Minnesota, USA.
  • McKay CP; NASA Ames Research Center Moffet Field, California, USA.
  • Owen TC; Institute for Astronomy, University of Hawai'i at Manoa Honolulu, Hawaii, USA.
  • Navarro-González R; Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México México City, México.
  • Jones JH; NASA Johnson Space Center Houston, Texas, USA.
  • Jakosky BM; LASP, University of Colorado Boulder Colorado, USA.
  • Steele A; Geophysical Laboratory, Carnegie Institution of Washington Washington, District of Columbia, USA.
Geophys Res Lett ; 40(23): 6033-6037, 2013 Dec 16.
Article em En | MEDLINE | ID: mdl-26074632
ABSTRACT
[1] The Sample Analysis at Mars (SAM) instrument suite on the Mars Science Laboratory (MSL) measured a Mars atmospheric14N/15N ratio of 173 ± 11 on sol 341 of the mission, agreeing with Viking's measurement of 168 ± 17. The MSL/SAM value was based on Quadrupole Mass Spectrometer measurements of an enriched atmospheric sample, with CO2 and H2O removed. Doubly ionized nitrogen data at m/z 14 and 14.5 had the highest signal/background ratio, with results confirmed by m/z 28 and 29 data. Gases in SNC meteorite glasses have been interpreted as mixtures containing a Martian atmospheric component, based partly on distinctive14N/15N and40Ar/14N ratios. Recent MSL/SAM measurements of the40Ar/14N ratio (0.51 ± 0.01) are incompatible with the Viking ratio (0.35 ± 0.08). The meteorite mixing line is more consistent with the atmospheric composition measured by Viking than by MSL.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2013 Tipo de documento: Article
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2013 Tipo de documento: Article