Coincidence of maser emission from OH at 6.035 GHz and methanol at 6.668 GHz

Abstract

Massive newly formed stars are obscured by dust, and their clearest signature is often at radio frequencies from strong molecular maser emission. In some cases, both hydroxyl and methanol masers are present. Maser position measurements of both species are then especially useful for exploring the immediate surroundings of the new-born star.