Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.207..127n&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 207, March 1, 1984, p. 127-138.
Astronomy and Astrophysics
Astronomy
31
Hydroxyl Emission, Interstellar Masers, Orion Nebula, Radio Astronomy, Stellar Evolution, Flow Velocity, Interstellar Magnetic Fields, Radio Interferometers
Scientific paper
Observations are presented of the OH masers in Orion-KL made both with a single-baseline interferometer and with MERLIN. The masers show evidence of a rotating torus around IRc2 together with a hitherto undetected population of weak, widely distributed masers which probably correspond to the 'low velocity' H2O masers. The characteristics of the OH maser emission indicate that IRc2 is more likely to represent a stage of star formation than to represent a late stage of stellar evolution. The high central mass which is required for stability of the rotating torus is considered unlikely, and so it is suggested that the rotation is unstable and is associated with the mass loss from IRc2.
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