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Recent work has made it clear that the ``standard model of pulsar radio emission cannot be the full answer. Some fundamental assumptions about the magnetic field and plasma flow in the radio-loud region have been called into question by recent observational and theoretical work, but the solutions to the problems posed are far from clear. It is time to formulate and carry out new observational campaigns designed to address these problems; sensitive low-frequency observations will an important part of such a campaign. Because pulsars are strong at low frequencies, we believe there will be a good number of candidates even for high-time-resolution single pulse work, as well as mean profile and integrated spectrum measurements. Such data can push the envelope of current models, test competing theories of the radio loud region, and possibly provide direct measures of the state of the emitting plasma.
Interstellar scattering is known to broaden distant objects spatially and temporally. The latter aspect is difficult to analyse, unless the signals carry their own time stamps. Pulsars are so kind to do us this favour. Typically the signature is a br
The rare intermittent pulsars pose some of the most challenging questions surrounding the pulsar emission mechanism, but typically have relatively minimal low-frequency ($lesssim$ 300 MHz) coverage. We present the first low-frequency detection of the
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 lo
We present new, low-frequency images of the powerful FR I radio galaxy Hydra A (3C 218). Images were made with the Very Large Array (VLA) at frequencies of 1415, 330, and 74 MHz, with resolutions on the order of 20. The morphology of the source is se
The LWA will be well suited to address many important questions about the physics and astrophysics of extragalactic synchrotron sources. Good low-frequency data will enable major steps forward in our understanding of radio galaxy physics, of the plas