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Near-infrared spectroscopy and monochromatic isophotometry of NGC 6302

Phillips, J. P.; Reay, N. K. and White, G. J. (1983). Near-infrared spectroscopy and monochromatic isophotometry of NGC 6302. Monthly Notices of the Royal Astronomical Society, 203 pp. 977–985.

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URL: http://adsabs.harvard.edu/full/1983MNRAS.203..977P
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Abstract

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: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 33782
Depositing User: Glenn White
Date Deposited: 07 Jun 2012 10:03
Last Modified: 08 Jun 2012 08:38
URI: http://oro.open.ac.uk/id/eprint/33782
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