Magnetic fields in dwarfs versus early-type galaxies

Details Magnetic fields in dwarfs versus early-type galaxies Magnetic fields in dwarfs versus early-type galaxies

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010hia....15..454c&link_type=abstract

Highlights of Astronomy, Volume 15, p. 454-455

Astronomy and Astrophysics

Astronomy

1

Galaxies: Irregular, Galaxies: Dwarf, Galaxies: Starburst, Galaxies: Magnetic Fields

Scientific paper

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.

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