What Determines the Boundaries of H2O Maser Emission in an X-ray Illuminated Gas Disk ?

C. Y. Kuo, F. Gao, J. A. Braatz +7

High precision mapping of H2O megamaser emission from active galaxies has revealed more than a dozen Keplerian H2O maser disks, which enable a ~4% uncertainty estimate of the Hubbl…