Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.211..267m&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 211, Nov. 15, 1984, p. 267-276.
Astronomy and Astrophysics
Astronomy
11
Astronomical Spectroscopy, Fabry-Perot Spectrometers, Line Shape, Nebulae, High Resolution, Lens Design, Neutral Gases, Plasma Dynamics, Radial Velocity, Signal To Noise Ratios, Spectral Resolution, Stellar Evolution, Velocity Distribution
Scientific paper
Profiles of the [O III] 5007 Å line have been obtained with an insect-eye Fabry-Perot with high signal-to-noise ratios, a high spectral resolution (≅50000), but low spatial resolution (≅3 arcmin) along two lines 34 and 74 pc long respectively, over the Carina nebula. Very large-scale, separate velocity components are found over a range of 84 km s-1. There is some evidence that a radially expanding shell about 70 pc in diameter is present. However, it is possible that some of these large-scale motions are those which were present in the neutral clouds before the ionizing stars were formed. Evidence of the merger of two adjacent spiral features is also considered.
Keir Derek
Lopez Jose Alberto
Meaburn John
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