Alexander Mead
Post-doctoral research fellow

Alexander Mead

About Me

My name is Alexander Mead and I am a cosmologist currently holding a CITA post-doctoral fellowship. At the moment I am working with Ludo van Waerbeke at the University of British Columbia in Vancouver. I completed an undergraduate-Masters degree at The University of Oxford where I worked on mass transfer between stars in binary systems. I completed my Ph.D. at the University of Edinburgh under the supervision of John Peacock and also did a short post-doctoral position there with Catherine Heymans. My main interest is how non-linear cosmological structure formation is influenced by 'beyond-standard-model' physics, such as baryonic feedback, massive neutrinos, dark energy and modified gravitational physics.


I am interested in how non-linear structure formation can be understood using inspiration from cosmological n-body simulations. These simulations are extremely useful, but are too expensive to be run for every possible cosmological model under consideration. I have worked on 'rescaling' methods to alter the cosmology of a previously run simulation by remapping length and time units and modifying the internal structure of haloes. More recently, I have looked at using the halo model to produce accurate matter power spectra, which will be useful for analyising weak lensing data sets; the publicly available HMcode is the culmination of this work and provides non-linear density power spectra. HMcode is incorporated within CAMB.


You can email me at

My CV can be found here.

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