Magnetic field in galaxies, galaxy clusters, and intergalactic space | Zendy

Ar Dar | Zendy; A. De Rújula | Zendy

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Magnetic field in galaxies, galaxy clusters, and intergalactic space

Author(s) -

Ar Dar,

A. De Rújula

Publication year - 2005

Publication title -

physical review. d. particles, fields, gravitation, and cosmology/physical review. d, particles, fields, gravitation, and cosmology

Language(s) - English

Resource type - Journals

eISSN - 1550-7998

pISSN - 1550-2368

DOI - 10.1103/physrevd.72.123002

Subject(s) - physics , astrophysics , intergalactic travel , galaxy cluster , supernova , intergalactic dust , astronomy , galaxy , intracluster medium , cosmic ray , galaxy groups and clusters , radio galaxy , redshift

Magnetic fields of debated origin appear to permeate the Universe on alllarge scales. There is mounting evidence that supernovae produce not onlyroughly spherical ejecta and winds, but also highly relativistic jets ofordinary matter. These jets, which travel long distances, slow down byaccelerating the matter encountered on their path to cosmic-ray energies. Weshow that, if the turbulent motions induced by the winds and the cosmic raysgenerate magnetic fields in rough energy equipartition, the predictedmagnetic-field strengths coincide with the ones observed not only in galaxies(5 $\mu$G in the Milky Way) but also in galaxy clusters (6 $\mu$G in Coma). Theprediction for the intergalactic (or inter-cluster) field is 50 nG.Comment: 9 pages. No figure

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