Correlation of Supernova Remnant Masers and Gamma-Ray Sources (2009)
Hewitt, John W., Yusef-Zadeh, Farhad, Wardle, Mark
Supernova remnants interacting with molecular clouds are potentially exciting systems in which to detect evidence of cosmic ray acceleration. Prominent gamma-ray emission is produced via the decay of...
Discovery of New Interacting Supernova Remnants in the Inner Galaxy (2009)
Hewitt, John W., Yusef-Zadeh, Farhad
OH(1720 MHz) masers are excellent signposts of interaction between supernova remnants(SNRs) and molecular clouds. Using the GBT and VLA we have surveyed 75 SNRs and six candidates for maser emission....
On the Formation of Compact Stellar Disks Around Sgr A* (2008)
Wardle, Mark, Yusef-Zadeh, Farhad
The recent identification of one or two sub-parsec disks of young, massive stars orbiting the ~4e6 solar mass black hole Sgr A* has prompted an "in-situ" scenario for star formation in disks of gas...
Point sources from a Spitzer IRAC survey of the Galactic Center (2008)
Ramírez, Solange V., Arendt, Richard G., Sellgren, Kris, Stolovy, Susan R., Cotera, Angela, Smith, Howard A., ...
We have obtained Spitzer IRAC observations of the central 2.0° × 1.4° (~280 × 200 pc) of the Galaxy at 3.6-8.0 μm. A point-source catalog of 1,065,565 objects is presented. The catalog includes...
Point Sources from a Spitzer IRAC Survey of the Galactic Center (2007)
Ramirez, Solange V., Arendt, Richard G., Sellgren, Kris, Stolovy, Susan R., Cotera, Angela, Smith, Howard A., ...
We have obtained Spitzer/IRAC observations of the central 2.0 x 1.4 degrees (~280 x 200 pc) of the Galaxy at 3.6-8.0 microns. A point source catalog of 1,065,565 objects is presented. The catalog...
Yusef-Zadeh, Farhad, Seiradakis, John H.
Abstract can be found in the full text link
Diffuse, Non-Thermal X-ray Emission from the Galactic Star Cluster Westerlund 1 (2006)
Muno, Michael P., Law, Casey, Clark, J. Simon, Dougherty, Sean M., De Grijs, Richard, Zwart, Simon Portegies, ...
We present the diffuse X-ray emission identified in Chandra observations of the young, massive Galactic star cluster Westerlund 1. After removing point-like X-ray sources down to a completeness limit...
GBT Observations of IC 443: the Nature of OH(1720 MHz) Masers and OH Absorption (2006)
Hewitt, John W., Yusef-Zadeh, Farhad, Wardle, Mark, Roberts, Douglas A., Kassim, Namir E.
We present results of spectral line observations of the ground state transitions of hydroxyl(OH) toward supernova remnant IC 443 carried out with the Green Bank Telescope. At a spatial resolution of...
Turbulent Origin of the Galactic-Center Magnetic Field: Nonthermal Radio Filaments (2005)
Boldyrev, Stanislav, Yusef-Zadeh, Farhad
A great deal of study has been carried out over the last twenty years on the origin of the magnetic activity in the Galactic center. One of the most popular hypotheses assumes milli-Gauss magnetic...
A Radio Transient 0.1 pc from Sagittarius A* (2005)
Bower, Geoffrey C., Roberts, Doug A., Yusef-Zadeh, Farhad, Backer, Donald C., Cotton, W. D., Goss, W. M., ...
We report the discovery of a transient radio source 2.7 arcsec (0.1 pc projected distance) South of the Galactic Center massive black hole, Sagittarius A*. The source flared with a peak of at least...
OH(1720 MHz) Masers at the Galactic Centre (1998)
Wardle, Mark, Yusef-Zadeh, Farhad, Geballe, T. R.
OH(1720 MHz) masers permit direct measurements of the magnetic field strength at the Galactic Centre, and their angular broadening constrains models for the medium that scatters radio waves in the...
Melia, Fulvio, Yusef-Zadeh, Farhad, Fatuzzo, Marco
Continuum low-frequency radio observations of the Galactic Center reveal the presence of two prominent radio sources, Sgr A East and its surrounding Halo, containing non-thermal particle...
Wardle, Mark, Yusef-Zadeh, Farhad, Geballe, T. R.
OH(1720 MHz) masers unaccompanied by 1665/7 MHz line masers have recently been proposed as indicators of the interaction of supernova remnants (SNRs) and molecular clouds. We present a model for the...
Radio study of the arc and the Sgr A complex near the galactic center / (1986)
Thesis (Ph. D.)--Columbia University, 1986.