Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984aj.....89.1387h&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 89, Sept. 1984, p. 1387-1390.
Astronomy and Astrophysics
Astronomy
Infrared Astronomy, Interstellar Masers, Molecular Clouds, Orion Nebula, Stellar Evolution, Maser Outputs, Silicon Oxides
Scientific paper
A rapid variation has been observed in the amplitude of the v = -6.5 km/s feature in the v = O, J = 1 approaching SiO emission from the Orion-KL infrared nebula. The feature appeared and disappeared over an eight day period between February 11 and February 20, 1983. The variations in the feature occurred while the amplitude and shape of the broad plateau emission remained relatively constant. It is concluded that the -6.5 km/s feature is a maser source. The plateau of emission showed no significant time variation over the period of a year and it is suggested that this is mostly thermal. The size of the maser is estimated to be no greater than 5 x 10 to the 15th cm, which is much smaller than the size of the thermally emitting region.
Haschick Aubrey David
Zisk Stan H.
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