Today's standard textbooks treat the theoretical structure of electric
and magnetic fields, but their emphasis is on electromagnetic radiation
and static-electric and magnetic fields. In this book, Eugene Parker
provides advanced graduate students and researchers with a much-needed
complement to existing texts, one that discusses the dynamic
electromagnetism of the cosmos--that is, the vast magnetic fields that
are carried bodily in the swirling ionized gases of stars and galaxies
and throughout intergalactic space.
Parker is arguably the world's leading authority on solar wind and the
effects of magnetic fields in the heliosphere, and his originality of
thought and distinctive approach to physics are very much in evidence
here. Seeking to enrich discussions in standard texts and correct
misconceptions about the dynamics of these large-scale fields, Parker
engages readers in a series of "conversations" that are at times
anecdotal and even entertaining without ever sacrificing theoretical
rigor. The dynamics he describes represents the Maxwell stresses of the
magnetic field working against the pressure and inertia of the bulk
motion of ionized gases, characterized in terms of the magnetic field
and gas velocity. Parker shows how this dynamic interaction cannot be
fully expressed in terms of the electric current and electric field.
Conversations on Electric and Magnetic Fields in the Cosmos goes back
to basics to explain why classical hydrodynamics and
magnetohydrodynamics are inescapable, even in the deepest reaches of
space.