Observations of the new OH maser source G43.2-0.1

Astronomy and Astrophysics – Astronomy

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Astronomical Spectroscopy, Emission Spectra, Hydrogen Clouds, Hydroxyl Emission, Interstellar Masers, Radio Sources (Astronomy), Centimeter Waves, Circular Polarization

Scientific paper

Emission in the 1612-MHz OH line has been recorded with the Nancay radio telescope in the new maser source G43.2-0.1, which is located in the same direction as the radio complex W49. The emission is weakly circularly polarized and peaks at two radial velocities, 35.8 and 62.6 km/sec. No emission has been detected in the other three 18-cm OH lines or in the 1.35-cm H2O line. The maser G43.2-0.1 has characteristics resembling type II OH/IR sources. It cannot be identified with any known variable or infrared star.

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