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[Fe iii] lines in the planetary nebula NGC 2392

Published online by Cambridge University Press:  30 August 2012

Yong Zhang ,
Xuan Fang ,
Wayne Chau ,
Chin-Hao Hsia ,
Xiao-Wei Liu  and
Sun Kwok
Yong Zhang
Affiliation:
Department of Physics, The University of Hong Kong, Hong Kong email: zhangy96@hku.hk
Xuan Fang
Affiliation:
Department of Astronomy, School of Physics, Peking University, Beijing, China
Wayne Chau
Affiliation:
Department of Physics, The University of Hong Kong, Hong Kong email: zhangy96@hku.hk
Chin-Hao Hsia
Affiliation:
Department of Physics, The University of Hong Kong, Hong Kong email: zhangy96@hku.hk
Xiao-Wei Liu
Affiliation:
Department of Astronomy, School of Physics, Peking University, Beijing, China Kavli Institute for Astronomy and Astrophysics at Peking University, Beijing, China
Sun Kwok
Affiliation:
Department of Physics, The University of Hong Kong, Hong Kong email: zhangy96@hku.hk
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Abstract

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The Eskimo Nebula (NGC 2392) is a young double-shell planetary nebula (PN). Its intrinsic structure and the responsible shaping mechanism are still not fully understood. We present new optical spectroscopy of NGC 2392 at two different locations to obtain the spectra of the inner and outer shells. Several [Fe iii] lines are clearly detected. We find that these [Fe iii] lines mostly originate from the inner shell. Therefore, we suggest that NGC 2392 might have an intrinsic structure similar to the Ant Nebula Mz 3, which exhibits a number of [Fe iii] lines from the central dense regions. In this scenario, the inner and outer shells correspond to the central emission core and the outer lobes of Mz 3, respectively.

Keywords

line: identificationplanetary nebulae: individual (NGC 2392, Mz 3)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S283: Planetary Nebulae: An Eye to the Future , July 2011 , pp. 532 - 533
Copyright
Copyright © International Astronomical Union 2012