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The 12C/13C ratio as a chemistry indicator

Eva Wirström ; Wolf D. Geppert ; Carina M. Persson (Institutionen för rymd- och geovetenskap, Radioastronomi och astrofysik) ; S. Charnley
The Molecular Universe, Posters from the proceedings of the 280th Symposium of the International Astronomical Union held in Toledo, Spain, May 30-June 3, 2011, #384 Vol. 280 (2011), 384,
[Konferensbidrag, poster]

Isotopic ratios of elements are considered powerful tools, e.g. in tracing the origin of solar system body materials, or the degree of nucleosynthesis processing throughout the Galaxy. In interstellar molecules, some isotopic ratios like H/D and 12C/13C can also be used as indicators of their chemical origin. Isotope fractionation in gas-phase chemical reactions and gas-dust interaction makes observations of the ratio between 12C and 13C isotopologues suitable to distinguish between different formation scenarios. We will present observations of the 12C/13C ratio in methanol (CH3OH) and formaldehyde (CH2O) towards a sample of embedded, massive young stellar objects. In relation to this we also present results from theoretical modeling showing the usefulness of the 12C/13C ratio as a chemistry indicator.

Denna post skapades 2011-11-08. Senast ändrad 2014-09-02.
CPL Pubid: 148268


Institutioner (Chalmers)

Institutionen för rymd- och geovetenskap, Radioastronomi och astrofysik (2010-2017)



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