471 citations · 1.9k across the 15 of their papers we have counts for
14 papers
The Geometry of and Mass Accretion Rate through the Maser Accretion Disk in NGC 4258
J. R. Herrnstein, J. M. Moran, L. J. Greenhill +1
A maximum likelihood analysis of the NGC 4258 maser positions and velocities reveals a ~2 sigma deviation from Keplerian motion in the projected rotation curve of the high-velocity…
X-ray Luminosity and Absorption Column Fluctuations in the H2O Maser Galaxy NGC 4258 from Weeks to Years
Antonella Fruscione, Lincoln J. Greenhill, Alexei V. Filippenko +3
We report monitoring of the 0.3-10 keV spectrum of NGC4258 with XMM over 1.5 years.We als o report reprocessing of an overlapping series of archival Chandra observations. By includ…
A Warped Accretion Disk and Wide Angle Outflow in the Inner Parsec of the Circinus Galaxy
L. J. Greenhill, R. S. Booth, S. P. Ellingsen +7
We present the first VLBI maps of H2O maser emission (lambda 1.3cm) in the nucleus of the Circinus Galaxy, constructed from data obtained with the Australia Telescope Long Baseline…
Outflow 20--2000 AU from a High-Mass Protostar in W51-IRS2
J. A. Eisner, L. J. Greenhill, J. R. Herrnstein +2
We present the results of the first high angular resolution observations of SiO maser emission towards the star forming region W51-IRS2 made with the Very Large Array (VLA) and Ver…
A Search for Water Maser Emission in Southern AGN and Star Forming Galaxies -- Discovery of a Maser in the Edge-on Galaxy IRASF01063-8034
L. J. Greenhill, S. P. Ellingsen, R. P. Norris +7
We report the cumulative results of five surveys for water maser emission at 1.35 cm wavelength in 131 active galactic nuclei (AGNs) and star-forming galaxies, conducted at the Par…
A Binary Millisecond Pulsar in Globular Cluster NGC6544
Scott M. Ransom, Lincoln J. Greenhill, James R. Herrnstein +4
We report the detection of a new 3.06 ms binary pulsar in the globular cluster NGC6544 using a Fourier-domain ``acceleration'' search. With an implied companion mass of ~0.01 solar…