The list of interstellar molecules displaying maser activity has been growing rapidly in recent years. A brief description of the more prominent “other” maser molecules is provided in §3.1.4. Among those, methanol (CH3OH) and ammonia (NH3) have generated the most activity and show the promise that they soon will join the three “classical” masers OH, H2O and SiO as equally important. This chapter summarizes the current status of maser studies of these two species.
KeywordsBrightness Temperature Maser Emission Interstellar Space Methanol Maser Maser Spot
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