139 citations · 591 across the 9 of their papers we have counts for
9 papers
Discovery of Candidate HO Disk Masers in AGN and Estimations of Centripetal Accelerations
Lincoln J. Greenhill, Paul T. Kondratko, James M. Moran +1
Based on spectroscopic signatures, about one-third of known HO maser sources in active galactic nuclei (AGN) are believed to arise in highly inclined accretion disks around cen…
The Parsec-scale Accretion Disk in NGC 3393
Paul T. Kondratko, Lincoln J. Greenhill, James M. Moran
We present a Very Long Baseline Interferometry image of the water maser emission in the nuclear region of NGC3393. The maser emission has a linear distribution oriented at a positi…
Discovery of Water Maser Emission in Five AGN and a Possible Correlation Between Water Maser and Nuclear 2-10 keV Luminosities
Paul T. Kondratko, Lincoln J. Greenhill, James M. Moran
We report the discovery of water maser emission in five active galactic nuclei (AGN) with the 100-m Green Bank Telescope (GBT). The positions of the newly discovered masers, measur…
First Detection of Millimeter/Submillimeter Extragalactic H2O Maser Emission
E. M. L. Humphreys, L. J. Greenhill, M. J. Reid +5
We report the first detection of an extragalactic millimeter wavelength H2O maser at 183 GHz towards NGC 3079 using the Submillimeter Array (SMA), and a tentative submillimeter wav…
Discovery of Water Maser Emission in Eight AGN with 70-m Antennas of NASA's Deep Space Network
P. T. Kondratko, L. J. Greenhill, J. M. Moran +9
We report the discovery of water maser emission in eight active galactic nuclei (AGN) with the 70-m NASA Deep Space Network (DSN) antennas at Tidbinbilla, Australia and Robledo, Sp…
Probing the Magnetic Field at Sub-Parsec Radii in the Accretion Disk of NGC 4258
Maryam Modjaz, James M. Moran, Paul T. Kondratko +1
We present an analysis of polarimetric observations at 22 GHz of the water vapor masers in NGC 4258 obtained with the VLA and the GBT. We do not detect any circular polarization in…