19th of January 2016 |
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An Empirical Relation Between The Large-Scale Magnetic Field And The Dynamical Mass In Galaxies |
by Fatemeh Tabatabaei (IAC, Spain) |
Abstract. The origin and evolution of
cosmic magnetic fields as well as the influence of the magnetic fields on the
evolution of galaxies are unknown. Though not without challenges, the dynamo
theory can explain the large-scale coherent magnetic fields which govern
galaxies, but observational evidence for the theory is so far very scarce.
Putting together the available data of non-interacting, non-cluster galaxies
with known large-scale magnetic fields, Tabatabei et al. (2016) find a tight correlation
between the integrated polarized flux density and the rotation speed, v(rot),
of galaxies. Reference: Tabatabaei, Martinsson, Knapen, Beckman, Koribalski, and Elmegreen 2016, ApJ Letters, in press |