High-speed flows in the vicinity of the Trapezium stars

Details High-speed flows in the vicinity of the Trapezium stars High-speed flows in the vicinity of the Trapezium stars

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994ap%26ss.216..263m&link_type=abstract

Astrophysics and Space Science, vol. 216, no. 1-2, p. 263-265

Astronomy and Astrophysics

Astrophysics

Interstellar Matter, Light (Visible Radiation), Orion Nebula, Stellar Envelopes, Stellar Spectra, Stellar Winds, Visible Spectrum, Astronomical Spectroscopy, Echelle Gratings

Scientific paper

The (OIII) 5007 A line profiles at high spectral and spatial resolution have been obtained at a single slit position near the Trapezium cluster in the Orion Nebula (M42, NGC1976) using the Manchester Echelle Spectrometer (MES). The very long integration time at this position confirms the earlier tentative identification of a shell on the nearside of the Trapezium cluster with a relative velocity of -100 km/s and a radius of 1 arcminute. No receding counterpart is found. We believe this is the first detection of this feature at optical wavelengths, previous spectroscopic work (O'Dell et al., 1993), (Baldwin et al., 1991), (Castaneda, 1988) having concentrated on the main nebular material at relatively low velocities.

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