Other
Scientific paper
Oct 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982nyasa.395..216s&link_type=abstract
(NASA, National Science Foundation, New York Academy of Sciences, et al., Symposium on the Orion Nebula to Honor Henry Draper, N
Other
2
Interstellar Masers, Late Stars, Nebulae, Silicon Oxides, Molecular Spectra, Variable Stars
Scientific paper
The presence of an SiO maser in the region of the Kleimann-Low (KL) nebula near IRc2 and IRc4 is investigated in regard to its resemblance to other SiO masers and to whether one of the objects within this nebula, perhaps IRc2, might be a late-type star associated with the region either in a true spatial sense or perhaps as a foreground or background object. It is determined that the set of conditions exciting the SiO J = 1-0 and J = 2-1 masers near late-type long-period variables also exists in the KL nebula. However, the conditions responsible for excitation of the higher J maser transitions are absent or modified sufficiently in the KL region to result in a modified J = 3.2 velocity structure and not to result in bright J = 4.-3 masers. It is concluded that KL appears to the SiO maser region to be very much like but not exactly like the region near a late-type star, and in this respect appears to be an almost totally unique object completely unlike other star-formation maser regions.
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