Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2011-12-12
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
To appear in the special issue of the Bulletin of the Astronomical Society of India on Transients at different wavelengths, ed
Scientific paper
We are at the dawn of a new golden age for radio astronomy, with a new generation of facilities under construction and the global community focussed on the Square Kilometre Array as its goal for the next decade. These new facilities offer orders of magnitude improvements in survey speed compared to existing radio telescopes and arrays. Furthermore, the study of transient and variable radio sources, and what they can tell us about the extremes of astrophysics as well as the state of the diffuse intervening media, have been embraced as key science projects for these new facilities. In this paper we review the studies of the populations of radio transients made to date, largely based upon archival surveys. Many of these radio transients and variables have been found in the image plane, and their astrophysical origin remains unclear. We take this population and combine it with sensitivity estimates for the next generation arrays to demonstrate that in the coming decade we may find ourselves detecting 10^5 image plane radio transients per year, providing a vast and rich field of research and an almost limitless set of targets for multiwavelength follow up.
Bell Maria E.
Fender Rob P.
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