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Aris Karastergiou

Physics Lecturer

  • Visiting Professor at the University of the Western Cape and Rhodes University, South Africa
  • Senior Research Fellow at St Edmund Hall at the University of Oxford

I specialize in astrophysical problems related to pulsars, as well as observational and computational techniques to achieve pulsar science goals with next generation telescopes.

Please have a look at the project website for the Square Kilometre Array, a large international collaboration to build a huge radio telescope across southern Africa and Western Australia.

I also spend a lot of my time working on pulsars and fast transient sources using LOFAR, the most sensitive radio telescope at low frequencies.

I am the principal investigator of ARTEMIS, a project aimed at real-time discovery of pulsars and fast radio bursts.

I teach Special Relativity and Symmetry, and General Relativity and Cosmology for St Edmund Hall, Oxford

Pulsars, fast transients, and next generation radio telescopes

Next generation radio telescopes are providing opportunities to study extreme, highly energetic phenomena that occur on very short timescales. Pulsars constitute a well known source of such events, ranging from the highly variable pulse-to-pulse radio emission, to giant pulses, extremely sporadic pulses and rare emission events that even temporarily disrupt their stable rotational properties. The observed characteristics of these events are also modulated by propagation through the ionised and magnetised medium of interstellar space. In this project, the student will work with radio data from current and emerging next generation telescopes, to construct physical models of newly observed pulsar variability and improve observational techniques, understand the relationship between the pulsar population and the growing population of isolated Fast Radio Bursts, and establish the role of propagation in the interstellar medium in newly observed properties of pulsar phenomenology. This project aims at developing models that will directly contribute to the pulsar science goals with the Square Kilometre Array, and the student will have access to data from pathfinder and precursor instruments to the SKA.