Detecting Changing Polarization Structures in Sagittarius A* with High Frequency VLBI (2009)
Fish, Vincent L., Doeleman, Sheperd S., Broderick, Avery E., Loeb, Abraham, Rogers, Alan E. E.
Sagittarius A* is the source of near infrared, X-ray, radio, and (sub)millimeter emission associated with the supermassive black hole at the Galactic Center. In the submillimeter regime, Sgr A*...
Observing a Black Hole Event Horizon: (Sub)Millimeter VLBI of Sgr A* (2009)
Fish, Vincent L., Doeleman, Sheperd S.
Very strong evidence suggests that Sagittarius A*, a compact radio source at the center of the Milky Way, marks the position of a super massive black hole. The proximity of Sgr A* in combination with...
The Murchison Widefield Array: Design Overview (2009)
Lonsdale, Colin J., Cappallo, Roger J., Morales, Miguel F., Briggs, Frank H., Benkevitch, Leonid, Bowman, Judd D., ...
The Murchison Widefield Array (MWA) is a dipole-based aperture array synthesis telescope designed to operate in the 80-300 MHz frequency range. It is capable of a wide range of science...
Approaching the event horizon: 1.3mm VLBI of SgrA* (2008)
Advances in VLBI instrumentation now allow wideband recording that significantly increases the sensitivity of short wavelength VLBI observations. Observations of the super-massive black hole...
Using Millimeter VLBI to Constrain RIAF Models of Sagittarius A* (2008)
Fish, Vincent L., Broderick, Avery E., Doeleman, Sheperd S., Loeb, Abraham
The recent detection of Sagittarius A* at lambda = 1.3 mm on a baseline from Hawaii to Arizona demonstrates that millimeter wavelength very long baseline interferometry (VLBI) can now spatially...
Estimating the Parameters of Sgr A*'s Accretion Flow Via Millimeter VLBI (2008)
Broderick, Avery E., Fish, Vincent L., Doeleman, Sheperd S., Loeb, Abraham
Recent millimeter-VLBI observations of Sagittarius A* (Sgr A*) have, for the first time, directly probed distances comparable to the horizon scale of a black hole. This provides unprecedented access...
Methods for detecting flaring structures in Sagittarius A* with high frequency VLBI (2008)
Doeleman, Sheperd S., Fish, Vincent L., Broderick, Avery E., Loeb, Abraham, Rogers, Alan E. E.
The super massive black hole candidate, Sagittarius A*, exhibits variability from radio to X-ray wavelengths on time scales that correspond to < 10 Schwarzschild radii. We survey the potential of...
Detecting Flaring Structures in Sagittarius A* with (Sub)Millimeter VLBI (2008)
Fish, Vincent L., Doeleman, Sheperd S., Broderick, Avery E., Loeb, Abraham, Rogers, Alan E. E.
Multiwavelength monitoring observations of Sagittarius A* exhibit variability on timescales of minutes to hours, indicating emission regions localized near the event horizon....
Bowman, Judd D., Barnes, David G., Briggs, Frank H., Corey, Brian E., Lynch, Merv J., Bhat, Narayana D. R., ...
Experiments were performed with prototype antenna tiles for the Mileura Widefield Array Low Frequency Demonstrator (MWA LFD) to better understand the wide-field, wide-band properties of their design...
Bowman, Judd D., Barnes, David G., Briggs, Frank H., Corey, Brian E., Lynch, Merv J., Bhat, N. D. Ramesh, ...
Experiments were performed with prototype antenna tiles for the Mileura Widefield Array Low Frequency Demonstrator (MWA LFD) to better understand the wide-field, wide-band properties of their design...
Bowman, Judd D., Barnes, David G., Briggs, Frank H., Corey, Brian E., Lynch, Merv J., Bhat, N. D. Ramesh, ...
Experiments were performed with prototype antenna tiles for the Mileura Widefield Array Low Frequency Demonstrator (MWA LFD) to better understand the wide-field, wide-band properties of their design...
Bowman, Judd D., Barnes, David G., Briggs, Frank H., Corey, Brian E., Lynch, Merv J., Bhat, N. D. Ramesh, ...
Experiments were performed with prototype antenna tiles for the Mileura Widefield Array Low Frequency Demonstrator (MWA LFD) to better understand the wide-field, wide-band properties of their design...
Bowman, Judd D., Barnes, David G., Briggs, Frank H., Corey, Brian E., Lynch, Merv J., Bhat, N. D. Ramesh, ...
Experiments were performed with prototype antenna tiles for the Mileura Widefield Array Low Frequency Demonstrator (MWA LFD) to better understand the wide-field, wide-band properties of their design...
Bowman, Judd D., Barnes, David G., Briggs, Frank H., Corey, Brian E., Lynch, Merv J., Bhat, N. D. R., ...
Experiments were performed with prototype antenna tiles for the Mileura Widefield Array Low Frequency Demonstrator (MWA LFD) to better understand the wide-field, wide-band properties of their design...
Bowman, Judd D., Barnes, David G., Briggs, Frank H., Corey, Brian E., Lynch, Merv J., Bhat, N. D. Ramesh, ...
Experiments were performed with prototype antenna tiles for the Mileura Widefield Array--Low Frequency Demonstrator (MWA-LFD) to better understand the widefield, wideband properties of their design...
Using VLBI to Probe the Orion-KL Outflow on AU Scales (2004)
Doeleman, Sheperd S., Lonsdale, Colin J., Kondratko, Paul T., Predmore, C. Read
We present the first contemporaneous 43GHz and 86GHz VLBI images of the v=1 J=2-1 and J=1-0 SiO masers in the Orion-KL nebula. Both maser species exhibit the same general morphology of earlier J=1-0...
Imagining active galactic nuclei with 3mm-VLBI (1995)
Doeleman, Sheperd S. (Sheperd Samuel)
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1995.
Imagining active galactic nuclei with 3mm-VLBI (1995)
Doeleman, Sheperd S. (Sheperd Samuel)
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1995.