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- W2000371498 abstract "Multifrequency polarimetry with the Very Long Baseline Array telescope has revealed absolute Faraday rotation measures (RMs) in excess of 1000 rad m-2 in the central regions of the quasars 3C 273, 3C 279, and 3C 380. Beyond a projected distance of ~20 h-1 pc, however, the jets of all three sources are found to have RM < 100 rad m-2. Such sharp RM gradients cannot be produced by cluster or galactic-scale magnetic fields but rather must be the result of magnetic fields organized on scales of 1-100 pc. If associated with the region that produces the narrow optical emission lines, then magnetic fields of strength ~0.05 μG are required to be uniform over scales of ~10 pc. The direct detection of high RMs in these quasar cores can explain the low fractional-core polarizations usually observed in quasars at centimeter wavelengths as the result of irregularities in the Faraday screen on scales smaller than the telescope beam." @default.
- W2000371498 created "2016-06-24" @default.
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- W2000371498 date "1998-10-20" @default.
- W2000371498 modified "2023-09-23" @default.
- W2000371498 title "Magnetic Fields in Quasar Cores" @default.
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- W2000371498 doi "https://doi.org/10.1086/306286" @default.
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