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http://dx.doi.org/10.5303/JKAS.2004.37.5.355

LARGE SCALE MAGNETIC FIELDS IN LENS GALAXIES  

NARASIMHA D. (Astronomical Institute, Tohoku University and Tata Institute of Fundamental Research, Romi Bhabha Road)
CHITRE S. M. (Department of Physics, Mumbai University)
Publication Information
Journal of The Korean Astronomical Society / v.37, no.5, 2004 , pp. 355-359 More about this Journal
Abstract
Differential Faraday Rotation measurements between the images of same background source, of multiply-imaged gravitational lens systems can be effectively used to provide a valuable probe to establish the existence of large-scale ordered magnetic fields in lensing galaxies as well as galaxy clusters. Estimates of the magnetic field in lens galaxies, based on the radio polarization measurements do not appear to show any clear evidence for evolution with redhsift of the coherent large scale magnetic field between redshift of 0.9 and the present epoch. However, our method clearly establishes the presence of coherent large scale magnetic field in giant ellitpical galaxies.
Keywords
gravitation lens; magnetic fields;
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