An OH maser in the Large Magellanic Cloud

Astronomy and Astrophysics – Astronomy

Scientific paper

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Circular Polarization, Hydroxyl Emission, Interstellar Masers, Magellanic Clouds, Emission Spectra, H Ii Regions, Radio Telescopes, Water Masers

Scientific paper

An OH maser has been discovered in the direction of the H II region N159 in the Large Magellanic Cloud. The maser emits on the 1665-MHz transition, with two narrow velocity features (less than 0.5 km/s) separated by about 4 km/s, each having a peak intensity of about 0.1 Jy but displaying opposite senses of circular polarization. These properties indicate that it is similar to the hundred or so galactic Type I masers found near H II regions (believed to be sites of star formation); it is the first such maser found outside the Galaxy.

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