Bio & contact

Hi! I’m Ellis. I am an astroparticle physicist at RIKEN in Japan. My research focuses on how cosmic rays propagate through structured, magnetised environments, how this determines their coupling to different phases of gas, and how these processes influence galaxy evolution. My work lies at the interface of cosmic-ray physics, theoretical astrophysics and high-energy multimessenger observations.

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Much of my recent work asks how local transport physics — set by magnetic fields, turbulence and gas structure — connects to larger-scale behaviour in molecular clouds, galactic outflows, accreting gas and circumgalactic environments. I combine theoretical and computational modelling with gamma-ray, neutrino, radio and other observational diagnostics to test these ideas across astrophysical scales.​

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I grew up near Leicester, UK, and did my undergraduate studies at Cambridge University in Natural Sciences, specialising in Astrophysics in my final year. I then obtained my Masters degree from University College London (UCL) before working in gamma-ray astronomy at the Max-Planck-Institute for Nuclear Physics in Heidelberg, Germany for a year. I completed my PhD in Astrophysics at UCL's Mullard Space Science Laboratory. Since then, I have been working as an independent post-doctoral fellow - 3 years in Taiwan (National Tsing Hua University), now in Japan (2 years as a JSPS fellow at The University of Osaka, and now at RIKEN's Pioneering Research Institute, near Tokyo, since December 2024).