Abstract
The results of observations of water maser emission in the star-forming region G43.8-0.1, performed at a wavelength of 1.35 cm with the 22-m radio telescope of the Pushchino Radio Astronomy Observatory are presented. The integrated intensity of the maser emission in G43.8-0.1 varies quasi-periodically on characteristic time scales between 3.9 and 12.1 yr, possibly related to variations of the activity of the central star during its formation. Nine strong flares with maximum fluxes exceeding 3000 Jy were detected, and were identified with maser spots in high-resolution maps. It is argued that a shell model for the H2O maser in G43.8-0.1 is preferred.
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