Physics
Scientific paper
Jan 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001iaus..205..418j&link_type=abstract
Galaxies and their Constituents at the Highest Angular Resolutions, Proceedings of IAU Symposium #205, held 15-18 August 2000 at
Physics
Scientific paper
At sufficiently low frequencies, no ground-based radio array will be able to produce high resolution images while looking through the ionosphere. A space-based array will be needed to explore the objects and processes which dominate the sky at the lowest radio frequencies. An imaging radio interferometer based on a large number of small, inexpensive satellites would be able to track solar radio bursts associated with coronal mass ejections out to the distance of Earth, determine the frequency and duration of early epochs of nonthermal activity in galaxies, detect the very extended remnants of ancient galactic supernovae and gamma-ray bursts, and provide unique information about the interstellar medium. Angular resolution would be limited by interstellar and interplanetary scattering to much worse than an arcsecond at frequencies below 10-30 MHz, but this still represents an orders-of-magnitude improvement over existing imaging capabilities at these frequencies. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the U.S. National Aeronautics and Space Administration.
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