High Resolution Imaging of the Galactic Center at Low Frequencies

Details High Resolution Imaging of the Galactic Center at Low Frequencies High Resolution Imaging of the Galactic Center at Low Frequencies

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...201.3101n&link_type=abstract

American Astronomical Society, 201st AAS Meeting, #31.01; Bulletin of the American Astronomical Society, Vol. 34, p.1151

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We present a wide field, high resolution image of the Galactic Center region at 327 MHz. With a resolution of 7'' and an RMS noise of ~ 1.7 mJy beam-1, this image represents a significant increase in resolution and in sensitivity over previously published VLA images at comparable frequencies. Using this new image, we have detected Nearly 100 previously unknown radio sources, at least a dozen non-thermal filament candidates which can be used to trace the Galactic Center magnetic field, A radio transient, and several steep spectrum sources that are pulsar candidates. A low resolution version of a simultaneously obtained image at 74 MHz will also be presented, and will be reported on in further detail in a separate talk by C.L. Brogan. Further discussion of non-thermal filament morphology and orientation will be discussed in a seperate talk by T.N. LaRosa. Basic research in radio astronomy at the Naval Research Laboratory is supported by the Office of Naval Research. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities,Inc.

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