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Very deep spectroscopy of NGC 7009

Published online by Cambridge University Press:  05 March 2015

Xuan Fang ,
Xiaowei Liu  and
Peter J. Storey
Xuan Fang
Affiliation:
Department of Astronomy, School of Physics, Peking University, Beijing 100871, P. R. China email: fangx@pku.edu.cn
Xiaowei Liu
Affiliation:
Department of Astronomy, School of Physics, Peking University, Beijing 100871, P. R. China email: fangx@pku.edu.cn Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, P. R. China
Peter J. Storey
Affiliation:
Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK
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Abstract

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We report new calculations of the effective recombination coefficients for the nebular N ii and O ii lines and very deep spectroscopy of the bright planetary nebula (PN) NGC 7009.

Keywords

atomic dataline: formationISM: abundancesplanetary nebulae: individual
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Highlights H16: Highlights of Astronomy , August 2012 , pp. 622
Copyright
Copyright © International Astronomical Union 2015 

References

Fang, X. & Liu, X.-W. 2011, MNRAS 415, 181Google Scholar
Fang, X., Storey, P. J., & Liu, X.-W. 2011, A&A 530, A18Google Scholar
Liu, X.-W., Storey, P. J., Barlow, M. J., & Clegg, R. E. S. 1995, MNRAS 272, 369CrossRefGoogle Scholar
Liu, X.-W., Storey, P. J., Barlow, M. J., Danziger, I. J., Cohen, M., & Bryce, M. 2000, MNRAS 312, 585CrossRefGoogle Scholar