First Detection of 28Si18O Maser and Thermal Emission from Orion KL

Details First Detection of 28Si18O Maser and Thermal Emission from Orion KL First Detection of 28Si18O Maser and Thermal Emission from Orion KL

Mar 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005apj...622..390c&link_type=abstract

The Astrophysical Journal, Volume 622, Issue 1, pp. 390-392.

Astronomy and Astrophysics

Astronomy

3

Ism: Individual: Name: Orion Kleinmann-Low, Line: Identification, Masers

Scientific paper

We present the first astronomical detection of 28Si18O maser and thermal emission toward Orion KL by using the laboratory-measured line frequencies of 28Si18O. The simple model of a 28Si18O maser condition adopting a line overlap mechanism leads us to confirm a maser action in spite of its lowest relative abundance, i.e., 28Si16O/28Si18O~500. Now the 28Si18O lines can be used to investigate interstellar physics and chemistry, especially when the optical depths of the spectral lines of the main species are high.

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