High Resolution, High Sensitivity Imaging of the Galactic Center at 330 MHz

Authors

Michael E. Nord, Naval Research Laboratory, Washington DC
Crystal L. Brogan, National Radio Astronomy Observatory, Socorro NM
Scott D. Hyman, Sweet Briar College
T. Joseph W. Lazio, Naval Research Laboratory, Washington DC
Namir E. Kassim, Naval Research Laboratory, Washington DC
Ted N. LaRosa, Kennesaw State UniversityFollow
K. Anantharamaiah, Raman Research Institute, Bangalore India
Nebojsa Duric, University of New Mexico - Main Campus

Document Type

Article

Publication Date

9-2003

Abstract

We present results derived from a wide field, sub-arcminute resolution VLA image of the Galactic Center region at 330 MHz (λ = 90 cm). With a resolution of ∼7″ × 12″ and an rms noise of 1.6 mJy beam⁻¹, this image represents a significant increase in resolution and sensitivity over the previously published VLA image at this frequency (eg. LaRosa et al. 2000). The improvement in sensitivity has significantly increased the census of small diameter sources in the region, resulted in the detection of two new Non-Thermal Filaments (NTFs) and 18 new NTF candidates, and resulted in the lowest frequency (tentative) detection of Sgr A*.

Journal Title

The Astronomical Journal

Journal ISSN

0004-637X

Volume

128

Issue

4

Digital Object Identifier (DOI)

10.1086/424001