AAS Meeting #193 - Austin, Texas, January 1999
Session 104. The Galactic Center
Display, Saturday, January 9, 1999, 9:20am-4:00pm, Exhibit Hall 1

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[104.04] A Wide-Field 90 cm VLA Image of the Galactic Center Region

T.N. LaRosa (Kennesaw St. Univ.), N.E. Kassim, T.J.W. Lazio (NRL), S.D. Hyman (Sweet Briar College)

We present a wide-field, high dynamic range, 90 cm VLA image of the galactic center region. This image was constructed from 4-configuration VLA data using a recently developed 3D-imaging algorithm which corrects for the non-coplanarity of the VLA and allows for distortion free imaging of sources far from the field center. The image, centered on Sgr A with a resolution of 43" x 23" and covering 4 x 3 degrees, gives an unprecedented contextual view of the radio sources in the galactic center region. In addition to all the well known sources, several new extended sources of emission have been identified. In total over a hundred sources have been catalogued. We present source positions, sizes, integrated flux densities and where appropriate the spectral index between 20 and 90 cm. In particular, the spectral index as a function of length along several of the nonthermal filaments has been found to be constant. Implications for the physics of these sources will be discussed.

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