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Observational Tests of Sgr A*'s State of the Accretion Flow
F. Yusef-Zadeh, R. G. Arendt, H. Bushouse +4
General relativistic magneto-hydrodynamic (GRMHD) simulations of the possibly magnetically arrested disk (MAD) of the accretion flow of Sgr A* predict short and long time variabili…
Non-stop Variability of Sgr A* using JWST at 2.1 and 4.8 micron Wavelengths: Evidence for Distinct Populations of Faint and Bright Variable Emission
F. Yusef-Zadeh, H. Bushouse, R. G. Arendt +3
We present first results of JWST Cycle 1 and 2 observations of Sgr A* using NIRCam taken simultaneously at 2.1 and 4.8 micron for a total of ~48 hours over seven different epochs i…
Sgr A* and its Environment: Low Mass Star Formation, the Origin of X-ray Gas and Collimated Outflow
F. Yusef-Zadeh, M. Wardle, R. Schödel +5
We present high-resolution multiwavelength radio continuum images of the region within 150 of Sgr A*, revealing a number of new extended features and stellar sources in this reg…
Compact Radio Sources within 30" of Sgr A*: Proper Motions, Stellar Winds and the Accretion Rate onto Sgr A*
F. Yusef-Zadeh, H. Bushouse, R. Schödel +5
Recent broad-band 34 and 44 GHz radio continuum observations of the Galactic center have revealed 41 massive stars identified with near-IR counterparts, as well as 44 proplyd candi…
The Discovery of Radio Stars within 10 arcseconds of Sgr A* at 7mm
F. Yusef-Zadeh, D. A. Roberts, H. Bushouse +4
Very Large Array observations of the Galactic Center at 7 mm have produced an image of the 30 arcseconds surrounding Sgr A* with a resolution of 82x42 milliarcseconds (mas). A comp…
ALMA Observations of the Galactic Center: SiO Outflows and High Mass Star Formation near Sgr A*
F. Yusef-Zadeh, M. Royster, M. Wardle +7
ALMA observations of the Galactic center with spatial resolution resulted in the detection of 11 SiO (5-4) clumps of molecular gas within 0.6pc (15) of Sgr A*…
Massive Star Formation of the Sgr A East HII Regions Near the Galactic Center
F. Yusef-Zadeh, J. H. Lacy, M. Wardle +4
A group of four compact HII regions associated with the well-known 50 km/s molecular cloud is the closest site of on-going star formation to the dynamical center of the Galaxy, at…
Simultaneous Multi-Wavelength Observations of Sgr A* during 2007 April 1-11
F. Yusef-Zadeh, H. Bushouse, M. Wardle +18
We report the detection of variable emission from Sgr A* in almost all wavelength bands (i.e. centimeter, millimeter, submillimeter, near-IR and X-rays) during a multi-wavelength o…