Computer Science – Performance
Scientific paper
Dec 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...116..101g&link_type=abstract
Astronomy and Astrophysics, vol. 116, no. 1, Dec. 1982, p. 101-110.
Computer Science
Performance
19
Astronomical Models, Gas Temperature, Hydrogen Clouds, Hydroxyl Emission, Interstellar Masers, Kinetic Energy, Water Masers, Brightness Temperature, Gas Heating, Molecular Excitation, Performance Prediction, Stellar Evolution
Scientific paper
The predictions of the collisional thermal-overlap pumping model for H II/OH maser regions are compared with 18-cm, other radio, and IR observations of the W3(OH) maser region. Maser brightness temperatures, relative intensities, line widths, and total luminosities are derived in the framework of the model and are found to be in excellent agreement with the observations. It is shown that strong excited-state masers should occur in molecular clouds with a radius of the order of 10 to the 15th cm, an H2 density of approximately 20 million per cu cm, an OH abundance of at least 0.001 percent, a kinetic temperature of 100-200 K, and a dust temperature that is slightly lower than the kinetic temperature of the gas.
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