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Refining the M_BH-V_c scaling relation with HI rotation curves of water megamaser galaxies
Ai-Lei Sun, Jenny E. Greene, C. M. Violette Impellizzeri +3
Black hole - galaxy scaling relations provide information about the coevolution of supermassive black holes and their host galaxies. We compare the black hole mass - circular veloc…
Using Megamaser Disks to Probe Black Hole Accretion
Jenny E. Greene, Anil Seth, Mark den Brok +7
We examine the alignment between H_2O megamaser disks on sub-pc scales with circumnuclear disks and bars on <500 pc scales observed with HST/WFC3. The HST imaging reveals young sta…
Mrk 1419 - a new distance determination
C. M. Violette Impellizzeri, James A. Braatz, Cheng-Yu Kuo +4
Water vapor megamasers from the center of active galaxies provide a powerful tool to trace accretion disks at sub-parsec resolution and, through an entirely geometrical method, mea…
Cosmology and the Hubble Constant: On the Megamaser Cosmology Project (MCP)
C. Henkel, J. A. Braatz, M. J. Reid +4
The Hubble constant Ho describes not only the expansion of local space at redshift z ~ 0, but is also a fundamental parameter determining the evolution of the universe. Recent meas…
Long term Arecibo monitoring of the water megamaser in MG J0414+0534
P. Castangia, M. C. V. Impellizzeri, J. P. McKean +4
We monitored the 22 GHz maser line in the lensed quasar MG J0414+0534 at z=2.64 with the 300-m Arecibo telescope for almost two years to detect possible additional maser components…