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Magnetic fields in dwarfs versus early-type galaxies

Published online by Cambridge University Press:  21 October 2010

Krzysztof T. Chyży
Krzysztof T. Chyży*
Affiliation:
Astronomical Observatory, Jagiellonian University, ul. Orla 171, 30-244 Kraków, Poland; email: chris@oa.uj.edu.pl
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Abstract

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According to a recent systematic study of dwarf irregular galaxies the production of their magnetic fields appears to be regulated mainly by the surface density of the galactic star-formation rate. Magnetic fields in nearby dwarfs are typically weak, with the mean value of the total field strength three times smaller than in the normal spirals. Dwarfs with stronger fields reveal vivid star-forming activity, have clear signs of current or recent gravitational interactions, are more massive and evolved systems. Recently discovered strong regular fields in an early-type ringed galaxy NGC 4736 also indicates that even without spiral density waves an effective generation of strong magnetic fields is possible in any type of galaxy if only starburst characteristics are reached.

Keywords

galaxies: irregulargalaxies: dwarfgalaxies: starburstgalaxies: magnetic fields
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Highlights H15: Highlights of Astronomy , November 2009 , pp. 454 - 455
Copyright
Copyright © International Astronomical Union 2010

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