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High Resolution, High Sensitivity Imaging of the Galactic Center at 330 MHz
Author(s) -
Nord Michael E.,
Brogan Crystal L.,
Hyman Scott D.,
Lazio T. Joseph W.,
Kassim Namir E.,
LaRosa T.N.,
Anantharamaiah K.,
Duric Neboja
Publication year - 2003
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.200385077
Subject(s) - physics , galactic center , resolution (logic) , sensitivity (control systems) , center (category theory) , astrophysics , high resolution , image resolution , center frequency , noise (video) , optics , astronomy , image (mathematics) , remote sensing , galaxy , geology , chemistry , artificial intelligence , electronic engineering , computer science , engineering , crystallography , band pass filter
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*.