Near-infrared spectroscopy and monochromatic isophotometry of NGC 6302

Details Near-infrared spectroscopy and monochromatic isophotometry of NGC 6302 Near-infrared spectroscopy and monochromatic isophotometry of NGC 6302

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.203..977p&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 203, June 1983, p. 977-985.

Astronomy and Astrophysics

Astronomy

14

Astronomical Maps, Emission Spectra, Infrared Spectra, Near Infrared Radiation, Nebulae, Electron Transitions, Kinematics, Shock Waves, Stellar Winds

Scientific paper

A near-infrared spectrum of NGC 6302 shows evidence for anomalously enhanced He I 2arcminS-2arcminP, and the presence of H2S(1)ν = 1→0 emission. The S(1) line is found to be confined to the inner regions of NGC 6302, and the authors 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 [N II] λ6584 and [O III] λ4959/5007 are also presented and these reveal the possible presence of low-excitation knots within the main nebular shell.

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