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Cosmic Ray Electrons

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Abstract

Modulation of cosmic electrons is similar to that of nuclei, but there are clear differences. At energies below 100 MeV the electron spectrum has a negative slope, which may in some way be related to electrons released from the magnetosphere of the planet Jupiter. If there is such a relationship, its nature is not established, and alternative explanations for the upturn exist. At higher energies, electrons are predominantly negatively charged, and it is probable that the difference in net charge sign from that of nuclei is responsible for many of the observed differences in the behavior of electrons and nuclei under modulation. A consistent picture of the cosmic positron abundance and its time variation may be emerging from the world dataset.

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References

  • Agrinier, B. et al.: 1969, 'East-West Asymmetry and Charge Sign Ratio of Primary Cosmic-Ray Electrons at 8.3 GV Rigidity Cutoff', Lettere al Nuovo Cimento 1, 53-56.

    Google Scholar 

  • Babcock, H.D.: 1959, 'The Sun's Polar Magnetic Field', Astrophys. J. 130, 364-366.

    Google Scholar 

  • Barbiellini, G. et al.: 1996, 'The Cosmic-Ray Positron to Electron Ratio in the Energy Range 0.85 to 14 GeV', Astron. Astrophys. 309, L15-L18.

    Google Scholar 

  • Barwick, S.W. et al.: 1995, 'Cosmic Ray Positrons at High Energies: A New Measurement', Phys. Rev. Lett. 75, 390-393.

    Google Scholar 

  • Bland, C.J.: 1979, 'Cosmic Ray Electrons With Energies from 0.1 to 1.5 GeV Measured Above Churchill in 1977', Proc. 16th Internat. Cosmic Ray Conf. (Kyoto) 1, 467-469.

    Google Scholar 

  • Bleeker, J.A.M. et al.: 1968, 'Energy Spectrum of Primary Electrons in the Range 0.5-30 GeV', Can. J. Phys. 46, S522-S526.

    Google Scholar 

  • Bieber, J., Evenson, P., and Matthaeus, W.: 1987, 'Magnetic Helicity of the IMF and the Solar Modulation of Cosmic Rays', Geophys. Res. Lett. 14, 864-867.

    Google Scholar 

  • Bieber, J.W. et al.: 1994, 'Proton and Electron Mean Free Paths: The Palmer Consensus Revisited', Astrophys. J. 420, 294-306.

    Google Scholar 

  • Buffington, A., Orth, C.D., and Smoot, G.F.: 1975, 'Measurement of Primary Cosmic-Ray Electrons and Positrons from 4 to 50 GeV', Astrophys. J. 199, 669-679.

    Google Scholar 

  • Burger, J.J., Swanenburg, B.N.: 1973, 'Energy Dependent Time Lag in the Long-Term Modulation of Cosmic Rays', J. Geophys. Res. 78, 292-305.

    Google Scholar 

  • Clem, J.M. et al.: 1996, 'Solar modulation of cosmic electrons', Astrophys. J. 464, 507-515.

    Google Scholar 

  • Daniel, R.R., and Stephens, S.A.: 1974, 'Cosmic-Ray Produced Electrons and Gamma-Rays in the Atmosphere', Rev. Geophys. Space Phys. 12, 233-258.

    Google Scholar 

  • Daugherty, J.K, Hartman, R.C. and Schmidt, P.J.: 1975, 'A Measurement of Cosmic-Ray Positron and Negatron Spectra Between 50 and 800 MV', Astrophys. J. 198, 493-505.

    Google Scholar 

  • Earl, J.A.: 1961, 'Cloud-Chamber Observations of Primary Cosmic-Ray Electrons', Phys. Rev. Lett. 6, 125-128.

    Google Scholar 

  • Earl, J.A., Neely, D.E., and Rygg, T.A.: 1972, 'Balloon Measurements of the Energy Spectrum of Cosmic Electrons Between 1 and 25 GeV', J. Geophys. Res. 77, 1087-1102.

    Google Scholar 

  • Evenson, P. et al.: 1979, 'The Solar Modulation of Cosmic Ray Electrons 1969-1977', J. Geophys. Res. 84, 5361-5365.

    Google Scholar 

  • Evenson, P. et al.: 1983, 'A Quantitative Test of Solar Modulation Theory: The Proton, Helium, and Electron Spectra from 1965 through 1979', Astrophys. J. 275, L15-L18.

    Google Scholar 

  • Evenson, P. and Meyer, P.: 1984, 'Solar Modulation of Cosmic Ray Electrons 1978-1983', J. Geophys. Res. 89, 2647-2654.

    Google Scholar 

  • Evenson, P. et al.: 1995, 'Cosmic electron spectra 1987-1994', J. Geophys. Res. 100, 7873-7875.

    Google Scholar 

  • Fanselow, J.L. et al.: 1969, 'Charge Composition and Energy Spectrum of Primary Cosmic-Ray Electrons', Astrophys. J. 158, 771-780.

    Google Scholar 

  • Fanselow, J.L. et al.: 1971, 'The Energy Spectrum of Primary Cosmic Ray Electrons from 2 GeV to 200GeV', Astrophysics and Space Science 14, 301-313.

    Google Scholar 

  • Ferrando, P. et al.: 1995, 'Evolution of the Electron/Proton Ratios Between 1 and 7 GV Measured at Ulysses as a Function of Time and Latitude', Proc. 24th Internat. Cosmic Ray Conf. (Rome) 4, 752-755.

    Google Scholar 

  • Freier, P.S., and Waddington, C.J.: 1965, 'Electrons, Hydrogen Nuclei, and Helium Nuclei Observed in the Primary Cosmic Radiation During 1963', J. Geophys. Res. 70, 5753-5768.

    Google Scholar 

  • Fulks, G.J.: 1975, 'Solar Modulation of Galactic Cosmic Ray Electrons, Protons, and Alphas', J. Geophys. Res. 80, 1701-1714.

    Google Scholar 

  • Fulks, G., Meyer, P., and L'Heureux, J.: 1973, 'The Cosmic Ray Electron Spectrum and its Modulation from 1968 through 1972', Proc. 13th Internat. Cosmic Ray Conf. (Denver) 2, 753-758.

    Google Scholar 

  • Garcia-Munoz, M. et al.: 1986, 'The Dependence of Solar Modulation on the Sign of the Cosmic Ray Particle Charge', J. Geophys. Res. 91, 2858-2866.

    Google Scholar 

  • Garcia-Munoz, M. et al.: 1991, 'The Dependence of Solar Modulation on the Sign of the Cosmic Ray Particle Charge During the 22 Year Solar Magnetic Cycle', Proc. 22nd Internat. Cosmic Ray Conf. (Dublin) 3, 497-500.

    Google Scholar 

  • Golden, R.L. et al.: 1987, 'Observation of Cosmic Ray Positrons in the Region from 5 to 50 GeV', Astron. Astrophys. 188, 145-154.

    Google Scholar 

  • Golden, R.L. et al.: 1994, 'Observation of Cosmic-Ray Electrons and Positrons Using and Imaging Calorimeter', Astrophys. J. 436, 769-775.

    Google Scholar 

  • Golden, R.L. et al.: 1996, 'Measurement of the Positron to Electron Ratio in the Cosmic Rays Above 5 GeV', Astrophys. J. 457, L103-L106.

    Google Scholar 

  • Hartman, R.C., and Pellerin, C.J.: 1976, 'Cosmic-Ray Positron and Negatron Spectra between 20 and 800 MeV Measured in 1974', Astrophys. J. 204, 927-933.

    Google Scholar 

  • Howard, R.: 1974, 'Studies of Solar Magnetic Fields', Solar Phys. 38, 283-299.

    Google Scholar 

  • Hovestadt, D.P., Meyer, P., and Schmidt, P.J.: 1970, 'A Detector System for Cosmic Ray Electrons', Nuc. Inst. Meth. 85, 93-100.

    Google Scholar 

  • Jokipii, J.R., L'Heureux, J.J., and Meyer, P.: 1967, 'Diurnal Intensity Variation of Low-Energy Electrons Observed near the Polar Cap', J. Geophys. Res. 72, 4375-4382.

    Google Scholar 

  • Jokipii, J.R., and Levy, E.H.: 1977, 'Effects of Particle Drifts on the Solar Modulation of Galactic Cosmic Rays', Astrophys. J. 213, L85-L88.

    Google Scholar 

  • L'Heureux, J., and Meyer, P.: 1976, 'Quiet-time increases of low-energy electrons: The Jovian origin', Astrophys. J. 209, 955-960.

    Google Scholar 

  • L'Heureux, J., and Meyer, P.: 1968, 'The Primary Cosmic-Ray Electron Spectrum in the Energy Range 300 MeV to 4 BeV from 1964 to 1966', Can. J. Phys. 46, S892-S895.

    Google Scholar 

  • Lin, H., Varsik, J., and Zirin, H.: 1994, 'High-Resolution Observations of the Polar Magnetic Fields of the Sun', Solar Phys. 155, 243-256.

    Google Scholar 

  • Marar, T.M.K., Freier, P.S., and Waddington, C.J.: 1971, 'Intensity and Energy Spectrum of Energetic Cosmic Ray Electrons', J. Geophys. Res. 76, 1625-1636.

    Google Scholar 

  • Meegan, C.A., and Earl, J.A.: 1975, 'The Spectrum of Cosmic Electrons with Energies Between 6 and 100 GeV', Astrophys. J. 197, 219-233.

    Google Scholar 

  • Meyer, P., and Vogt, R.: 1961, 'Electrons in the Primary Cosmic Radiation', Phys. Rev. Lett. 6, 193-196.

    Google Scholar 

  • Meyer, P., and Evenson, P.: 1978, 'The University of Chicago Cosmic Ray Electrons and Nuclei Experiment on the H Spacecraft', IEEE Trans. Geosci. Elect. GE-16, 180-185.

    Google Scholar 

  • Moraal, H. et al.: 1989, 'Neutron Monitor Latitude Survey of Cosmic Ray Intensity During the 1986/1987 Solar Minimum', J. Geophys. Res. 94, 1459-1464.

    Google Scholar 

  • Moraal, H., Jokipii, J.R., and Mewaldt, R.A.: 1991, 'Heliospheric Effects on Cosmic-Ray Electrons', Astrophys. J. 367, 191-201.

    Google Scholar 

  • Moses, D.: 1987, 'Jovian Electrons at 1 AU: 1978-1984', Astrophys. J. 313, 471-486.

    Google Scholar 

  • Müller, D., and Tang, K.K.: 1987, 'Cosmic-Ray Positrons from 10 to 20 GeV: A Balloon-Borne Measurement using the Geomagnetic East-West Asymmetry', Astrophys. J. 312, 183-194.

    Google Scholar 

  • Oran, W.A., Frye, G.M. Jr., and Wang, C.P.: 1969, 'Flux and Energy Spectrum of Cosmic-Ray Electrons at 42 North Geomagnetic Latitude in October 1967', J. Geophys. Res. 74, 53-58.

    Google Scholar 

  • Popielawska, B., and Simpson, J.A.: 1990, 'Neutron Monitor Investigations relating Modulated Cosmic Ray Spectra with Heliospheric Magnetic Field Polarity Reversals', in Physics of the Outer Heliosphere, ed. S. Grzeszielski and D. E. Page, 133-138, Pergamon Press, Oxford.

    Google Scholar 

  • Potgieter, M.S.: 1996, 'Heliospheric Modulation of Galactic Electrons: Consequences of New Calculations for the Mean Free Path of Electrons between 1 MeV and 10 GeV', J. Geophys. Res. 101, 24411-24422.

    Google Scholar 

  • Protheroe, R.: 1982, 'On the Nature of the Cosmic Ray Positron Spectrum', Astrophys. J. 254, 391-397.

    Google Scholar 

  • Rastoin, C. et al.: 1996, 'Time and Space Variations of the Galactic Electron Spectrum in the 3-D Heliosphere Explored by Ulysses', Astron. Astrophys. 307, 981-995.

    Google Scholar 

  • Rockstroh, J.M.: 1977, 'A New and Precise Construction of the Local Interstellar Electron Spectrum from the Radio Background and an Application to the Solar Modulation of Cosmic Rays Showing an Incompatibility of the Electron and Nuclei Modulation Using the Spherically Symmetric Fokker Plank Equation', PhD Thesis, University of New Hampshire, Durham.

    Google Scholar 

  • Rockstroh, J., and Webber, W.R.: 1969, 'A Measurement of the Spectrum of Cosmic-Ray Electrons between 20 MeV and 3 BeV in 1968 — Further Evidence for Extensive Time Variations of this Component', J. Geophys. Res. 74, 5041-5053.

    Google Scholar 

  • Schmidt, P.J.: 1972, 'Cosmic-Ray Electron Spectrum and its Modulation near Solar Maximum', J. Geophys. Res. 77, 3295-3310.

    Google Scholar 

  • Simpson, J.A., Fonger, W., and Treiman, S.B.: 1953, 'Cosmic Radiation Intensity-Time Variations and their Origin, I, Neutron Intensity Variation Method and Meteorological Factors', Phys. Rev. 90, 934.

    Google Scholar 

  • Strong, A. W. et al.: 1994, 'Diffuse Continuum Gamma Rays from the Galaxy Observed by COMPTEL, Astron. Astrophys. 292, 82-91.

    Google Scholar 

  • Tang, K.K.: 1984, 'The Energy Spectrum of Electrons and Cosmic-Ray Confinement: A New Measurement and Its Interpretation', Astrophys. J. 278, 881-892.

    Google Scholar 

  • Tuska, E.B.: 1990, 'Charge Sign Dependent Solar Modulation of 1-10 GV Cosmic Rays', Ph.D. Thesis, University of Delaware.

  • Tuska, E.B., Evenson, P., and Meyer, P.: 1991, 'Solar Modulation of Cosmic Electrons: Evidence for Dynamic Regulation', Astrophys. J. 373, L27-30.

    Google Scholar 

  • Webb, D.F., Davis, J.M., and McIntosh, P.S.: 1984, 'Observations of the Reappearance of Polar Coronal Holes and the Reversal of the Polar Magnetic Field', Solar Phys. 92, 109-132.

    Google Scholar 

  • Webber, W.R., Kish, J.C., and Rockstroh, J.M.: 1973, 'Measurements of the Primary Cosmic Ray Electron Spectrum from 1965 to 1972', Proc. 13th Internat. Cosmic Ray Conf. (Denver) 2, 760-764.

    Google Scholar 

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  1. Bartol Research Institute, University of Delaware, Newark, Delaware, 19716, USA

    Paul Evenson

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  1. Paul Evenson
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Evenson, P. Cosmic Ray Electrons. Space Science Reviews 83, 63–73 (1998). https://doi.org/10.1023/A:1005065211219

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