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Upper Limit to the Deuterium Abundance in Planetary Nebulae

Published online by Cambridge University Press:  26 May 2016

G. Hébrard ,
D. Péquignot ,
J. R. Walsh ,
C. Morisset ,
A. Vidal-Madjar  and
R. Ferlet
G. Hébrard
Affiliation:
1Institut d'Astrophysique de Paris, CNRS, 98 bis boulevard Arago, F-75014 Paris, Prance
D. Péquignot
Affiliation:
2 Observatoire de Paris-Meudon, F-92195 Meudon Cedex, France
J. R. Walsh
Affiliation:
3ST-ECF, European Southern Observatory, Karl-Schwarzschild Strasse, D-85748 Garching, Germany
C. Morisset
Affiliation:
4Institut d'Astrophysique de Marseille, Traverse du Siphon, BP 8, F-13376 Marseille Cedex 12, France
A. Vidal-Madjar
Affiliation:
1Institut d'Astrophysique de Paris, CNRS, 98 bis boulevard Arago, F-75014 Paris, Prance
R. Ferlet
Affiliation:
1Institut d'Astrophysique de Paris, CNRS, 98 bis boulevard Arago, F-75014 Paris, Prance

Extract

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We recently reported the first detection of the deuterium Balmer series in emission in H II regions, performed at the CFHT (Hébrard et al. 2000a) and at the VLT (Hébrard et al. 2000b). These narrow lines are excited by UV continuum fuorescence and arise at the atomic interface between H II regions and molecular clouds.

Following this discovery, we used the CFHT with the Gecko spectrograph to observe Balmer lines in planetary nebulae. The non-detection of the deuterium Balmer lines in planetary nebulae represents the first observational evidence that this isotope was, as expected, destroyed in the parent stars.

Type
Part VI: The Ionized Gas in Planetary Nebulae
Information
Symposium - International Astronomical Union , Volume 209: Planetary Nebulae: Their Evolution and Role in the Universe , 2003 , pp. 371
Copyright
Copyright © Astronomical Society of the Pacific 2003 

References

Hébrard, G., Péquignot, D., Vidal-Madjar, A., Walsh, J. R., Ferlet, R., 2000a, A&A, 354, L79 Google Scholar
Hébrard, G., Péquignot, D., Walsh, J. R., Vidal-Madjar, A., Ferlet, R., 2000b, A&A, 364, L31 Google Scholar