47 citations · 60 across the 2 of their papers we have counts for
10 papers
Massive Star Formation in the Molecular Ring Orbiting the Black Hole at the Galactic Center
F. Yusef-Zadeh, J. Braatz, M. Wardle +1
A ring of dense molecular gas extending 2-7 pc orbits the supermassive black hole Sgr A* at the center of our Galaxy. Using the Green Bank Telescope, we detected water maser lines…
The innermost region of the water megamaser radio galaxy 3C403
A. Tarchi, A. Brunthaler, C. Henkel +3
The standard unified scheme of active galactic nuclei requires the presence of high column densities of gas and dust potentially obscuring the central engine. So far, few direct su…
Extragalactic H_2O masers and X-ray absorbing column densities
J. S. Zhang, C. Henkel, M. Kadler +4
Having conducted a search for the 22 GHz water vapor line towards galaxies with nuclear activity, large nuclear column densities or high infrared luminosities, we present H_2O spec…
New H2O masers in Seyfert and FIR bright galaxies
C. Henkel, A. B. Peck, A. Tarchi +4
Extragalactic water vapor masers with 50, 1000, 1, and 230 solar (isotropic) luminosities were detected toward Mrk1066 (UGC2456), Mrk34, NGC3556 and Arp299, respectively. The inter…
A Green Bank Telescope Search for Water Masers in Nearby Active Galactic Nuclei
J. A. Braatz, C. Henkel, L. J. Greenhill +2
Using the Green Bank Telescope, we have conducted a survey for 1.3 cm water maser emission toward the nuclei of nearby active galaxies, the most sensitive large survey for H2O mase…
H2O megamasers: Accretion disks, jet interaction, outflows or massive star formation?
C. Henkel, J. A. Braatz, A. Tarchi +5
The 25 years following the serendipitous discovery of megamasers have seen tremendous progress in the study of luminous extragalactic HO emission. Single-dish monitoring and hi…