An interferometric and multi-transitional study of the Orion methanol masers

Details An interferometric and multi-transitional study of the Orion methanol masers An interferometric and multi-transitional study of the Orion methanol masers

Dec 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978phdt........14m&link_type=abstract

Ph.D. Thesis California Univ., Berkeley.

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3

Interstellar Masers, Methyl Alcohol, Orion Constellation, Brightness Temperature, Emission, Interferometry, Mapping, Molecular Excitation, Transition Probabilities

Scientific paper

The methanol source in the Orion was interferometrically mapped in two masing transitions of a wavelength of 1 cm: the 62 yields 61 (E) and the (72 yields 71)E. The source was found to consist of 10 components, with different Doppler velocities. Most of the components radiate in both of the mapped transitions, and have brightness temperatures or limits of 1000 to 4000 K. The molecular excitation was studied with a series of single-dish measurements, and a methanol transition, the 102 yields 101 (E), was detected. It was found that the temperature rotation temperature of the centimeter lines of methanol was around 110 K. It is concluded that the methanol masers are being excited by infrared emission from other objects in the vicinity.

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