Physics – Plasma Physics
Scientific paper
Apr 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...406..407p&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 406, no. 2, p. 407-419.
Physics
Plasma Physics
24
Dynamo Theory, H I Regions, Interstellar Magnetic Fields, Magnetic Flux, Quasars, Red Shift, Calcium, Energy Absorption, Faraday Effect, Magnesium, Plasma Physics
Scientific paper
The hypothesis that the population of strong H I absorption systems is responsible for a significant excess Faraday rotation measure in quasars is discussed, and it is concluded that the case is unproved, in contrast to a recent analysis by Wolfe et al. (1991). The limitations and pitfalls inherent in attempts to derive firm magnetic field strengths from the existing integrated rotation measures of quasars are discussed, and it is shown that although it is premature to use integrated quasar rotation measures to either confirm or rule out particular mechanisms of magnetic field amplification in galaxy disks, the present observations may call for reexamination of current theories of large-scale magnetic field generation. The sources of rotation measure in the double quasar 0957+561 are also discussed.
Kronberg Philipp P.
Perry Judith J.
Watson Alan M.
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