Evolution of magnetic fields in galaxies and future observational tests with the Square Kilometre Array

Evolution of magnetic fields in galaxies and future observational tests with the Square Kilometre Array

Aims. We investigate the cosmological evolution of largeand small-scale magnetic fields in galaxies in the light of present models of formation and evolution of galaxies. Methods. We use the dynamo theory to derive the timescales of amplification and ordering of magnetic fields in disk and puffy galaxies. Turbulence in protogalactic halos generated by thermal virialization can drive an efficien...

The origin of magnetic fields in galaxies: observational tests with the Square Kilometre Array

The all-sky survey of Faraday rotation, a Key Science Project of the planned Square Kilometre Array, will accumulate tens of millions of rotation measure measurements toward background radio sources and will provide a unique database for characterizing the overall magnetic geometry of magnetic fields in galaxies and in the intergalactic medium. Deep imaging of the polarized synchrotron emission...

Observations of Magnetic Fields in the Milky Way and in Nearby Galaxies with a Square Kilometre Array

The role of magnetic fields in the dynamical evolution of galaxies and of the interstellar medium (ISM) is not well understood, mainly because such fields are difficult to directly observe. Radio astronomy provides the best tools to measure magnetic fields: synchrotron radiation traces fields illuminated by cosmic-ray electrons, while Faraday rotation and Zeeman splitting allow us to detect fie...

Galaxy Evolution and Cosmology with the Square Kilometre Array

X iv :a st ro -p h/ 04 09 47 9v 1 2 0 Se p 20 04 Galaxy Evolution and Cosmology with the Square Kilometre Array S. Rawlings, F.B. Abdalla, S.L. Bridle, C.A. Blake, C.M. Baugh L.J. Greenhill, J.M. van der Hulst Astrophysics, Department of Physics, Keble Road, Oxford, OX1 3RH, UK Department of Physics and Astronomy, University College London, London, WC1E 6BT, UK School of Physics, University of ...

Cloud Computing and the Square Kilometre Array