Ravitational Magnetism: An Update

  • Saul-Paul Sirag
Part of the Fundamental Theories of Physics book series (FTPH, volume 126)


Gravitational magnetism (or the Blackett effect) is the generation of a magnetic field by an electrically neutral rotating mass, whose magnitude is determined by analogy with the magnetic field generated by a rotating electric charge. Since 1947, there is increasing evidence for this effect by the measurements of the magnetic fields of the solar planets, the sun, other stars, and even pulsars, as well as the galactic magnetic field. However, the attempt to measure this effect in the laboratory depends on the ability to measure extremely weak magnetic fields and the shielding of extraneous magnetic fields. Early attempts to measure this effect in the laboratory depended on ad hoc extensions of the simple rotational version of gravitational magnetism. Recently there have been more sophisticated laboratory approaches. Also the extended observational evidence has generated a plethora of theoretical attempts to derive the Blackett equation in a larger context. Of particular interest is the work of R.I. Gray, who performed an advanced version of Blackett’s static experiment, and also related the Blackett effect to several other theoretical and empirical relations particularly the Wesson effect--the constancy of the ratio of spin to mass-squared for planetary, stellar, and galactic bodies. Pauli’s anomalous magnetic moment (as a Blackett effect) is also considered as a bridge to the gravitomagnetic field generated by superconductors.


Anomalous Magnetic Moment Gravitational Magnetism Astronomical Object Nonminimal Coupling Macroscopic Body 
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  1. 1.
    Schuster, A. (1912) A Critical Examination of the Possible Causes of Terrestrial Magnetietism, Proc Lond. Phys. Soc. 24, 121–137(1911–1912).CrossRefGoogle Scholar
  2. 2.
    Wilson, H.A. (1923) An Experiment on the Origin of the Earth’s Magnetic Field, Proc. Roy.Soc. A, 104, 451–455ADSCrossRefGoogle Scholar
  3. 3.
    Swann, W.F.G, and Longacre, A. (1928) J. Franklin Inst. 206, 421.CrossRefGoogle Scholar
  4. 4.
    Blackett, P.M.S. (1947) The Magnetic Field of Massive Rotating Bodies, Nature 159, 658–666.ADSCrossRefGoogle Scholar
  5. 5.
    Sirag, S.-P. (1979) Gravitational Magnetism, Nature 278, 535–538.CrossRefADSGoogle Scholar
  6. 6.
    Braginsky, V., Polnarev, A. and Thorne, K. (1984) Foucalt Pendulum at the South Pole, Phys. Rev. Lett. 53, 863.CrossRefADSGoogle Scholar
  7. 7.
    Ciufolini, I. and Wheeler, J.A. (1995) Gravitation and Inertia, Princeton U.P., Princeton.zbMATHGoogle Scholar
  8. 8.
    Morrison, P. (1976) The Scientific and Public Life of P.M.S. Blackett, Scientific American 235:4, 138–139.ADSMathSciNetCrossRefGoogle Scholar
  9. 9.
    Smith, P.J. (1981) The Earth as a Magnet, in D. Smith (ed.), The Cambridge Encyclopedia Of Earth Sciences, Cambridge U.P., New York.Google Scholar
  10. 10.
    Blackett, P.M.S. (1952) A Negative Experiment Relating to Magnetism and the Earth’s Rotation, Phil. Trans. R. Soc. Lond. Series A, 897, 309–370.ADSCrossRefGoogle Scholar
  11. 11.
    Sagan, C. (1975) The Solar System, Scientific American, 233:3, 23–31.ADSCrossRefGoogle Scholar
  12. 12.
    Surdin, M, (1979) The Magnetic Field of the Planets, Il Nuovo Cimento,2C:5, 527–53.ADSGoogle Scholar
  13. 13.
    Surdin, M. (1977) Magnetic Field of the Planets, J. Franklin Inst., 303:6, 493–510.CrossRefGoogle Scholar
  14. 14.
    Harasim, A., v. Ludwiger, I., Kroy, W. and Auerbach, H. T. (1988) Laboratory Experiment for Testing Gravi-Magnetic Hypothesis with Squid-Magnetometers, in H.D. Hahlbohm and H. Lubbig (eds.), SQUID’ 85, Superconcuctiong Quantum Interference Devices and their Applications, de Gruyter, Berlin.Google Scholar
  15. 15.
    Gray, R.I. (1988) Unified Physics, Naval Surface Warfare Center, Dahlgren, Virginia.Google Scholar
  16. 16.
    Wesson, P.S. (1981) Clue to the Unification of Gravitation and Particle Physics, Phys. Rev. D,23:8, 1730–1734.CrossRefADSMathSciNetGoogle Scholar
  17. 17.
    Salam, A. (1989) Overview of Particle Physics, in P. Davies (ed.) The New Physics, Camb.U.P., New York.Google Scholar
  18. 18.
    Brosche, P. (1980) The Mass-Angular Momentum Diagram of Astronomical Objects, in P.G. Bergmann and V. De Sabbata (eds.) Cosmology and Gravitation, Plenum, New York.Google Scholar
  19. 19.
    De Sabbata, V. and Gasperini, M. (1983) The Angular Momentum of Celestial Bodies and the Fundamental Dimensionless Constants of Nature, Lett. Al Nuovo Cimento 38, 93–95.ADSCrossRefGoogle Scholar
  20. 20.
    De Sabbata, V. and Sivaram, C. (1994) Spin and Torsion in Gravitation, World Scientific, Singapore.zbMATHGoogle Scholar
  21. 21.
    Woodward, J.F. (1989) On Nonminimal Coupling of the Electromagnetic and Gravitational Fields, Foundations of Phyhsics 19:11, 1345–1361.ADSMathSciNetCrossRefGoogle Scholar
  22. 22.
    Barut, A.O. and Gornitz, T. (1985) On the Gyromagnetic Ratio in the Kaluza-Klein Theories and the Schuster-Blackett Law, Foundations of Physics 15:4, 433–437.CrossRefMathSciNetADSGoogle Scholar
  23. 23.
    Pauli, W. (1933) Annalen der Phyusik 18, 305 & 337.zbMATHCrossRefADSGoogle Scholar
  24. 24.
    Li, N. and Torr, D. (1991) Effects of a Gravitomagnetic Field on Pure Superconductors, Phys. Rev D 43:2 457.ADSGoogle Scholar
  25. 25.
    Li, N. and Torr, D. (1992) Gravitational Effects on the Magnetic Attenuation of Superconductors, Phys. Rev. B, 64:9, 5489.ADSCrossRefGoogle Scholar
  26. 26.
    Torr, D. and Li, N. (1993) Gravitoelectric-Electric Coupling via Superconductivity, Found.of Phys. Lett 6:4,71.Google Scholar
  27. 27.
    Stirniman, R. (1999) The Wallace Inventions, Spin Aligned Nuclei, the Gravitomagnetic Field, and the Tampere “Gravity-Shielding” Experiment: Is There a Connection? Frontier Perspectives 8:1, 20–25.Google Scholar
  28. 28.
    Wilson, J. (2000) Taming Gravity, Popular Mechanics 177:10, 40–42.Google Scholar
  29. 29.
    Bennett, J.G., Brown, R.L. and Thring, M.W. (1949) Unified Field Theory in a Curvature-Free Five Dimensional Manifold, Proc. R. Soc. London Ser. A 198, 39–61.ADSMathSciNetzbMATHCrossRefGoogle Scholar
  30. 30.
    Ahluwalia, D.V. and Wu, T.-Y. (1978) On the Magnetic Field of Cosmological Bodies, Lett. Nuovo Cimento 23:11, 406–408.CrossRefADSGoogle Scholar
  31. 31.
    McCrea, W.H. (1978) Magnetism and Rotation: Blackett’s Speculation of 1947, Speculations in Science and Technology, 1:4, 329–338.Google Scholar
  32. 32.
    Massa, C. (1989) On the Generalized Gravi-Magnetic Hypothesis, Annalen der Physik 7:46:2, 159–160.CrossRefADSGoogle Scholar
  33. 33.
    Muller-Hoissen, F. (1990) Gravity Actions, Boundary Terms and Second-Order Field Equations, Nucl. Phys. B 337, 709–736.ADSMathSciNetCrossRefGoogle Scholar
  34. 34.
    Srivastava, Y. and Widom, A. (1992) Gravitational Diamagentism, Phys. Lett. B 280, 52–54.ADSMathSciNetGoogle Scholar
  35. 35.
    Opher, R. and Wichoski, U.F. (1997) Origin of Magnetic Fields in the Universe due to Nonminimal Gravitational-Electromagnetic Coupling, Phys. Rev. Letters 78, 787–790.CrossRefADSGoogle Scholar

Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  • Saul-Paul Sirag
    • 1
  1. 1.International Space Sciences Organization (ISSO)San Francisco

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