Imaging spectrophotometry of the Orion Nebula core. I - Emission-line mapping and physical conditions

Details Imaging spectrophotometry of the Orion Nebula core. I - Emission-line mapping and physical conditions Imaging spectrophotometry of the Orion Nebula core. I - Emission-line mapping and physical conditions

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...399..147p&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 399, no. 1, p. 147-158.

Astronomy and Astrophysics

Astrophysics

63

Emission Spectra, H Ii Regions, Orion Nebula, Abundance, Astrometry, Calibrating, Charge Coupled Devices, Fabry-Perot Interferometers, H Lines

Scientific paper

The results of a Fabry-Perot imaging spectrophotometric study of the core of the Orion Nebula H II region are presented. H-alpha, H-beta, forbidden O III 5007 A, forbidden N II 6548, 6583 AA, forbidden S II 6716, 6731 AA, and He I 6678A emission-line flux maps have been derived from low-resolution (5 A FWHM) Fabry-Perot CCD interferograms of the inner 6' surrounding the exciting star Theta 1 C Ori. Using two methods we find a helium ionic abundance of 0.088 +/- 0.008, consistent with previous single-point spectroscopic determinations.

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