Discovery of Candidate H$_2$O Disk Masers in AGN and Estimations of Centripetal Accelerations (2009)
Greenhill, Lincoln J., Kondratko, Paul T., Moran, James M., Tilak, Avanti
Based on spectroscopic signatures, about one-third of known H$_2$O maser sources in active galactic nuclei (AGN) are believed to arise in highly inclined accretion disks around central engines. These...
The Rotating Molecular Structures and the Ionized Outflow Associated with IRAS 16547-4247 (2009)
Franco-Hernandez, Ramiro, Moran, James M., Rodriguez, Luis F., Garay, Guido
We present VLA 1.3 cm radio continuum and water maser observations as well as SMA SO$_2$ (226.300 GHz) and 1.3 mm dust continuum observations toward the massive star formation region IRAS 16547-4247....
Event-horizon-scale structure in the supermassive black hole candidate at the Galactic Centre (2008)
Doeleman, Sheperd, Weintroub, Jonathan, Rogers, Alan E. E., Plambeck, Richard, Freund, Robert, Tilanus, Remo P. J., ...
The cores of most galaxies are thought to harbour supermassive black holes, which power galactic nuclei by converting the gravitational energy of accreting matter into radiation (ref 1). Sagittarius...
Weintroub, Jonathan, Moran, James M., Wilner, David J., Young, Ken, Rao, Ramprasad, Shinnaga, Hiroko
We used the Submillimeter Array to map the angular distribution of the H30α recombination line (231.9 GHz) in the circumstellar region of the peculiar star MWC 349A. The resolution was 1.2", but...
The Black Hole Accretion Disk in NGC 4258: One of Nature's Most Beautiful Dynamical Systems (2008)
In this talk I will summarize some of the work that the CfA group has done to study the structure of the water masers in the accretion disk of NGC 4258. A series of 18 epochs of VLBA data taken from...
Rodriguez, Luis F., Moran, James M., Franco-Hernandez, Ramiro, Garay, Guido, Brooks, Kate J., Mardones, Diego
The triple radio source detected in association with the luminous infrared source IRAS 16547-4247 has previously been studied with high angular resolution and high sensitivity with the Very Large...
The Parsec-scale Accretion Disk in NGC 3393 (2008)
Kondratko, Paul T., Greenhill, Lincoln J., Moran, James M.
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 position angle of $\sim...
SMA Imaging of the Maser Emission from the H30$\alpha$ Radio Recombination Line in MWC349A (2008)
Weintroub, Jonathan, Moran, James M., Wilner, David J., Young, Ken H., Rao, Ramprasad, Shinnaga, Hiroko
We used the Submillimeter Array to map the angular distribution of the H30$\alpha$ recombination line (231.9 GHz) in the circumstellar region of the peculiar star MWC349A. The resolution was...
Infall and Outflow of Molecular Gas in Sgr B2 (2008)
Qin, Sheng-Li, Zhao, Jun-Hui, Moran, James M., Marrone, Daniel P., Patel, Nimesh A., Wang, Jun-Jie, ...
Observations of two H$_2$CO ($3_{03}-2_{02}$ and $3_{21}-2_{20}$) lines and continuum emission at 1.3 mm towards Sgr B2(N) and Sgr B2(M) have been carried out with the SMA. The mosaic maps of Sgr...
Astronomical Society Of, James M. Moran
This chapter discusses the various techniques used to calibrate the amplitude and phase of VLBI data. The effect of residual calibration errors on image quality is also considered. Contents 9.1...
Kondratko, Paul T., Greenhill, Lincoln J., Moran, James M.
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, measured with the VLA,...
Infall, Fragmentation and Outflow in Sgr B2 (2006)
Qin, Sheng-Li, Zhao, Jun-Hui, Moran, James M., Marrone, Daniel, Patel, N., Liu, Sheng-Yuan, ...
Observations of H$_{2}$CO lines and continuum at 1.3 mm towards Sgr B2(N) and Sgr B2(M) cores were carried out with the SMA. We imaged H$_{2}$CO line absorption against the continuum cores and the...
The Submillimeter Polarization of Sgr A* (2006)
Marrone, Daniel P., Moran, James M., Zhao, Jun-Hui, Rao, Ramprasad
We report on the submillimeter properties of Sagittarius A* derived from observations with the Submillimeter Array and its polarimeter. We find that the spectrum of Sgr A* between 230 and 690 GHz is...
A disk of dust and molecular gas around a high-mass protostar (2005)
Patel, Nimesh A., Curiel, Salvador, Sridharan, T. K., Zhang, Qizhou, Hunter, Todd R., Ho, Paul T. P., ...
The processes leading to the birth of low-mass stars such as our Sun have been well studied, but the formation of high-mass (> 8 x Sun's mass) stars has heretofore remained poorly understood. Recent...
Probing the Magnetic Field at Sub-Parsec Radii in the Accretion Disk of NGC 4258 (2005)
Modjaz, Maryam, Moran, James M., Kondratko, Paul T., Greenhill, Lincoln J.
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 the spectrum...
Fruscione, Antonella, Greenhill, Lincoln J., Filippenko, Alexei V., Moran, James M., Herrnstein, James R., Galle, Elizabeth
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 including earlier ASCA...
ADVANCED DEVELOPMENT MODEL OF A MOBILE METEOROLOGICAL STATION. (2005)
Moran, James M., Zinchuk, Michael, Guerin, George R., Charron, Ernest A., Bagley, Dennis W.
The report furnished a description of the advanced development model of a Mobile Meteorological Station. In this report the choice of particular sensors is discussed, and the data processor, forward...
Evidence for a Geometrically Thick Self-Gravitating Accretion Disk in NGC 3079 (2004)
Kondratko, Paul T., Greenhill, Lincoln J., Moran, James M.
We have mapped, for the first time, the full velocity extent of the water maser emission in NGC 3079. The largely north-south distribution of emission, aligned with a kpc-scale molecular disk, and...
Shinnaga, Hiroko, Moran, James M., Young, Ken H., Ho, Paul T. P.
We used the Submillimeter Array to image the SiO maser emission in the $v=1$, \$J=5-4$ transition associated with the peculiar red supergiant VY Canis Majoris. We identified seven maser components...
Atmospheric Phase Correction Using Total Power Radiometry at the Submillimeter Array (2004)
Battat, James B., Blundell, Raymond, Moran, James M., Paine, Scott
Phase noise caused by an inhomogeneous, time-variable water vapor distribution in our atmosphere reduces the angular resolution, visibility amplitude and coherence time of millimeter and...
The Submillimeter Array (2004)
Ho, Paul T. P., Moran, James M., Lo, Kwok Yung
The Submillimeter Array (SMA), a collaborative project of the Smithsonian Astrophysical Observatory (SAO) and the Academia Sinica Institute of Astronomy and Astrophysics (ASIAA), has begun operation...
The Mechanics of Long Bone Fractures. (2002)
Moran,James M., Peterson,Diane L., Skraba,Joseph S., Gallagher,Joe H., Greenwald,A. Seth
Fractures of long bones are a common clinical finding in human trauma situations. These include injuries which are sustained during automotive and aircraft crashes, parachute, landings, and aircraft...
Susan Mogul: At Home in Los Angeles (1998)
Wide Angle - Volume 20, Number 3, July 1998
Water maser emission and the parsec-scale jet in NGC 3079 (1997)
Trotter, Adam S., Greenhill, Lincoln J., Moran, James M., Reid, Mark J., Irwin, Judith A., Lo, Kwok-Yung
We have conducted VLBI observations of water maser and radio continuum emission in the nucleus of NGC 3079. The 22 GHz maser emission arises in compact clumps, distributed along an axis that is...
An "unpractical man" in Vermont :--Frederick Law Olmsted and Fairholt /--by James M. Moran. (1997)
Thesis (M.A.)--University of Vermont, 1997.
Typescripts.