Phillips, J. P.; Reay, N. K. and White, G. J.
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A near-infrared spectrum on NGC6302 shows evidence for anomalously enhanced HeI 2'S-2'P, and the presence of H2S(1)v=1→0 emission. The S(1) line is found to be confined to the inner regions of NGC6302, and we explore two processes whereby this might arise: shock interaction between a stellar wind and neutral inclusions, and formation of shocks behind ionization fronts. The strength of the Bγ line suggests the presence of relatively high central emission measures, and indicates densities of order Ne~104 cm-3 or higher. Contour maps in the lines [NII] λ6584 and [OIII] λ4959/5007 are also presented and these reveal the possible presence of low-excitation knots within the main nebular shell.
|Item Type:||Journal Article|
|Copyright Holders:||1983 Royal Astronomical Society|
|Keywords:||astronomical maps; emission spectra; infrared spectra; near infrared radiation; nebulae; electron transitions; kinematics; shock waves; stellar winds|
|Academic Unit/Department:||Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
|Interdisciplinary Research Centre:||Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)|
|Depositing User:||G. J. White|
|Date Deposited:||07 Jun 2012 10:03|
|Last Modified:||05 Oct 2016 17:37|
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