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Interstellar nitrogen isotope ratios

Published online by Cambridge University Press:  04 August 2017

R. Güsten  and
H. Ungerechts
R. Güsten
Affiliation:
Max-Planck-Institut für Radioastronomie, Bonn
H. Ungerechts
Affiliation:
I. Physikalisches Institut der Universität Köln

Extract

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We report first results of a systematic study of the galactic interstellar nitrogen isotope ratios, based upon measurements of the (J,K) = (1,1) and (2,2) lines of the 14NH3 and 15NH3 molecules. We find significant deviations of the [14N]/[15N3] abundance ratio from the solar-system value (~270), with the most extreme enrichment in the galactic-center region, where [14N]/[15N] ~ 1500. This value is consistent with a nitrogen nuclear-synthesis scheme in which 14N is the main product of normal secondary CNO-burning, whereas 15N is depleted by the same process.

Type
PART III: Dynamics and Evolution
Information
Symposium - International Astronomical Union , Volume 106: The Milky Way Galaxy , 1985 , pp. 585 - 586
Copyright
Copyright © Reidel 1985 

References

Güsten, R., Mezger, P.G. 1983, Vistas in Astronomy, in press Google Scholar
Pagel, B.E.J., Edmunds, M.G. 1981, Ann. Rev. Astron. Astrophys. 19, 77 CrossRefGoogle Scholar
Renzini, A., Voli, M. 1981, Astron. Astrophys. 94, 175 Google Scholar
Wannier, P.G., Linke, R.A., Penzias, A.A. 1981, Astrophys. J. 247, 522 CrossRefGoogle Scholar
Wilson, T.L., Pauls, T. 1979, Astron. Astrophys. 73, L10 Google Scholar