88 citations · 251 across the 4 of their papers we have counts for
3 papers · 1 filter
Toward a New Distance to the Active Galaxy NGC 4258: II. Centripetal Accelerations and Investigation of Spiral Structure
E. M. L. Humphreys, M. J. Reid, L. J. Greenhill +2
We report measurements of centripetal accelerations of maser spectral components of NGC 4258 for 51 epochs spanning 1994 to 2004. This is the second paper of a series, in which the…
The structure of the accretion disk in NGC 4258 derived from observations of its water vapor masers
Jim Moran, Liz Humphreys, Lincoln Greenhill +2
A wealth of new information about the structure of the maser disk in NGC 4258 has been obtained from a series of 18 VLBA observations spanning three years, as well as from 32 addit…
Imaging the Ionized Disk of the High-Mass Protostar Orion-I
M. J. Reid, K. M. Menten, L. J. Greenhill +1
We have imaged the enigmatic radio source-I (Orion-I) in the Orion-KL nebula with the VLA at 43 GHz with 34 mas angular resolution. The continuum emission is highly elongated and i…