IS THE SUN LIGHTER THAN THE EARTH? ISOTOPIC CO IN THE PHOTOSPHERE, VIEWED THROUGH THE LENS OF THREE-DIMENSIONAL SPECTRUM SYNTHESIS

@article{Ayres2013ISTS,
  title={IS THE SUN LIGHTER THAN THE EARTH? ISOTOPIC CO IN THE PHOTOSPHERE, VIEWED THROUGH THE LENS OF THREE-DIMENSIONAL SPECTRUM SYNTHESIS},
  author={Thomas R. Ayres and James R Lyons and Hans-G. Ludwig and Elisabetta Caffau and Sven Wedemeyer-B{\"o}hm},
  journal={The Astrophysical Journal},
  year={2013},
  volume={765}
}
We consider the formation of solar infrared (2–6 μm) rovibrational bands of carbon monoxide (CO) in CO5BOLD 3D convection models, with the aim of refining abundances of the heavy isotopes of carbon (13C) and oxygen (18O, 17O), to compare with direct capture measurements of solar wind light ions by the Genesis Discovery Mission. We find that previous, mainly 1D, analyses were systematically biased toward lower isotopic ratios (e.g., R23 ≡ 12C/13C), suggesting an isotopically “heavy” Sun contrary… 

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