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Showing 1 to 1 of 1 for “"NGC 4258"”.
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Astrophysical maser radiation from Keplerian disks near active galactic nuclei
… of active galaxies. In at least one galaxy (NGC 4258), such maser radiation is observed and arises from a disk around a presumed massive black hole. The heating, cooling, and excitation mechanisms necessary for creating the physical conditions and pumping for the masing are investigated. The …