Excitation of Far-Infrared Lines of OH and Maser Pumping Efficiency in Circumstellar Envelopes
Bujarrabal, V.; Nguyen-Q-Rieu; Le Bertre, T.; Thai-Q-Tung; Dinh-v-Trung; Gerard, E.
France, Spain
Abstract
We present the results obtained with a radiative transfer model to investigate the excitation of OH molecules. Maser pumping efficiencies are estimated from the model and compared to the value calculated using recent OH far-infrared (FIR) observations with ISO and OH maser data.