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- W2012183783 abstract "Effects which may possibly make the magnetic field measured in the Zeeman experiment less than that of the general magnetic field in the interstellar medium are discussed. It is shown that the magnetic field inside clouds is unlikely to be much less than that outside the clouds ; indeed the cloud field may well be greater than the general field if the clouds have experienced gravitational contraction. Thus on the basis of the present results the general field cannot be ∼ 3 × 10 −5 gauss as required by some authors. With a general galactic magnetic field of 7 × 10 −6 gauss the polarization of starlight can be adequately explained by the Davis–Greenstein theory if the uncertainties of that theory are taken into account. Such a field can also produce the required stabilization of the galactic spiral arm structure. On the other hand the synchrotron radio emission from the disk of the Galaxy would require a general field of ∼ 3 × 10 −5 gauss, and an alternative picture is proposed in which the emission comes from localized regions of enhanced magnetic field and perhaps also of high cosmic ray electron flux. A field of 7 × 10 −6 gauss in the disk and 2 × 10 −6 gauss in the halo is insufficient to hold the most energetic cosmic ray particles with energies ≽ 2 × 10 18 eV in the Galaxy. Fields as high as this are an embarrassment to theories of star formation unless some way is found of effectively removing the charged particles from the contracting cloud." @default.
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- W2012183783 date "1963-08-01" @default.
- W2012183783 modified "2023-10-17" @default.
- W2012183783 title "An Experiment to Measure the Magnetic Field of the Galaxy: III. Discussion of the Magnetic Field Measurements" @default.
- W2012183783 doi "https://doi.org/10.1093/mnras/126.4.369" @default.
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