[Fe iii] lines in the planetary nebula NGC 2392

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. Se...

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Bibliographic Details
Published in:Proceedings of the International Astronomical Union
Main Authors: Fang, X, Hsia, CH, Liu, XW, Chau, WC, Kwok, S, Zhang, Y
Format: Conference Object
Language:English
Published: Cambridge University Press. The Journal's web site is located at http://journals.cambridge.org/action/displayJournal?jid=IAU 2011
Subjects:
line: identification
planetary nebulae: individual (NGC 2392
Mz 3)
eskimo*
Online Access:https://doi.org/10.1017/S1743921312012288
http://hdl.handle.net/10722/165696
Description
Summary: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. © 2012 International Astronomical Union. published_or_final_version

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