Detection of dimethyl ether in SGR B 2

Details Detection of dimethyl ether in SGR B 2 Detection of dimethyl ether in SGR B 2

Apr 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976a%26a....48..159w&link_type=abstract

Astronomy and Astrophysics, vol. 48, no. 1, Apr. 1976, p. 159-161.

Astronomy and Astrophysics

Astrophysics

5

Ethers, Interstellar Matter, Methyl Compounds, Microwave Emission, Molecular Spectra, Brightness Temperature, Electron Transitions, Galactic Nuclei, Interstellar Masers, Molecular Excitation, Radio Spectra

Scientific paper

Emission detected at 9119.7 MHz towards Sgr B 2 has been identified as the 2(02)-1(11) transition of dimethyl ether, (CH3)2O. The line, which has a peak brightness temperature of 0.05 K, agrees with the laboratory spectrum if the central velocity is 64(+ or - 4)km/s and the velocity width is 23 km/s. In Sgr B 2, the populations of the energy levels are probably inverted, and the signal is the result of maser amplification of the continuum. No line was detected towards the Orion-IR nebula, possibly because of the low continuum behind the molecular cloud.

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