[Dr. Hollweg's Photo Logo]

Dr. Joseph V. Hollweg
Professor
Astrophysics/Solar-Terrestrial Physics

Research Interests: Dynamics of the solar atmosphere and solar wind, waves in plasmas.

The Sun's atmosphere exhibits a wide range of complex dynamic phenomena. At any instant of time there are about one million high-speed jets of gas, called spicules, on the Sun. There is a continual outflow, called the solar wind, of solar plasma into interplanetary space. The region just below the Sun's visible surface is filled with sound waves. The solar corona and the underlying chromosphere are constantly in motion. And there are frequent impulsive releases of energy, such as solar flares and coronal mass ejections. The solar atmosphere contains complex configurations of magnetic field which are also in a constant state of agitation. The magnetic and kinetic energy in the Sun's atmosphere is continually being converted into heat. The corona is heated to several million Kelvins, and some of this thermal energy enables the solar wind to be accelerated to high speeds and escape the Sun's gravity. The chromosphere and spicules are also heated to more modest temperatures. But the details of these processes are not understood.

Our research is concerned with developing theoretical models for the sources of momentum and energy that are required to explain the observed motions and heating. We have emphasized the roles of waves, which transport both momentum and energy and can therefore accelerate and heat the solar plasma. Understanding the physics of waves in the solar atmosphere is challenging. The waves propagate in a very structured medium, and they undergo complicated nonlinear interactions leading to shock formation, instabilities, and turbulence.

Our program is supported by grants from NASA and the NSF. These grants have supported the research of graduate students seeking M.S. or Ph.D. degrees as well as post-doctoral research associates. We are also involved with experimental programs on SOHO mission.

Hollweg was awarded the 1992 James Arthur Prize for Solar Physics by the Harvard-Smithsonian Center for Astrophysics, and in 2002 he was elected Fellow of the American Geophysical Union "for outstanding research on topics throughout the corona and solar wind and for consistently clear elucidation of the fundamental physical processes involved".

PUBLICATIONS

  1. Heil, H. and J.V. Hollweg, 1967: Electron reflection coefficient at zero energy, 1. Experiments, Phys. Rev., 164, 881-886.
  2. Hollweg, J.V., 1968: A statistical ray analysis of the scattering of radio waves by the solar corona, Astron. J., 73, 972-982.
  3. Hollweg, J.V., 1968: Solar coronal effects on pulsar signals, Nature, 220, 771-772.
  4. Hollweg, J.V. and J.V. Harrington, 1968: Properties of solar wind turbulence deduced by radio astronomical measurements, J. Geophys. Res., 73, 7221-7230.
  5. Hollweg, J.V., 1968: Interaction of the solar wind with the moon and formation of a lunar limb shock wave, J. Geophys. Res., 73, 7269-7276.
  6. Bracewell, R.N., V.R. Eschleman, and J.V. Hollweg, 1969: The occulting disc of the sun at radio wavelengths, Astrophys. J., 155, 367-368.
  7. Hollweg, J.V., 1969: Stochastic heating of protons by fast hydromagnetic wave, J. Geophys. Res., 74, 2899-2907.
  8. Hollweg, J.V., 1970: Lunar conducting islands and formation of a lunar limb shock wave, J. Geophys. Res., 75, 1209-1216.
  9. Jokipii, J.R. and J.V. Hollweg, 1970: Interplanetary scintillations and the structure of solar-wind fluctuations, Astrophys. J., 160, 745-753.
  10. Hollweg, J.V. and H.J. Volk, 1970: Two new plasma instabilities in the solar wind, Nature, 225, 441-443.
  11. Hollweg, J.V., 1970: Collisionless solar wind, 1. Constant electron temperature, J. Geophys. Res., 75, 2403-2418.
  12. Hollweg, J.V., 1970: Angular broadening of radio sources by solar wind turbulence, J. Geophys. Res., 75, 3715-3727.
  13. Hollweg, J.V., 1970: Fluctuations in times of arrival of pulsar pulses, Astrophys. J., 161, L225-L231.
  14. Hollweg, J.V. and H.J. Volk, 1970: New plasma instabilities in the solar wind, J. Geophys. Res., 75, 5297-5309.
  15. Hollweg, J.V. and H.J. Volk, 1971: Energy and momentum exchange in transverse electromagnetic waves, J. Geophys. Res., 76, 7527-7541.
  16. Hollweg, J.V., 1971: Density fluctuations driven by Alfvén waves, J. Geophys. Res., 76, 5155-5161.
  17. Hollweg, J.V., 1971: Nonlinear Landau damping of Alfvén waves, Phys. Rev. Letters, 27, 1349-1352.
  18. Hollweg, J.V., 1971: Collisionless solar wind, 2. Variable electron temperature, J. Geophys. Res., 76, 7491-7502.
  19. Hollweg, J.V., 1972: Supergranulation-driven Alfvén waves in the solar chromosphere, and related phenomena, Cosmic Electrodynamics, 2, 423-444.
  20. Hollweg, J.V. and J.R. Jokipii, 1972: Wavelength dependence of the inter-planetary scintillation index, 494-496. in Proceedings of the 1971 Solar Wind Conference (C.P. Sonett, P.J. Coleman, Jr., and J.M. Wilcox, eds.), NASA.
  21. Hollweg, J.V., 1972: Comments on the effects of supergranulation-driven Alfvén waves in the solar wind, Ibid, 223-226.
  22. Hollweg, J.V., 1972: Comments on density fluctuations in the solar wind, Ibid. 503-505.
  23. Hollweg, J.V. and J.R. Jokipii, 1972: Heat conduction in a turbulent magnetic field with application to solar wind electrons, J. Geophys. Res., 77, 3311-3316.
  24. Hollweg, J.V., 1972: Alfvenic motions in the solar atmosphere, Astrophys. J., 177, 255-259.
  25. Hollweg, J.V., 1973: Alfvén waves in a two-fluid model of the solar wind, Astrophys. J., 181, 547, 1973.
  26. Hollweg, J.V., 1973: Alfvén waves in the solar wind: Wave pressure, Poynting flux, and angular momentum, J. Geophys. Res., 78, 3643-3652.
  27. Hollweg, J.V., 1974: Alfvenic acceleration of solar wind helium and related phenomena. 1. Theory, J. Geophys. Res., 79, 1357-1363..
  28. Hollweg, J.V., 1974: Transverse Alfvén waves in the solar wind: Arbitrary k, vo, Bo, and dB, J. Geophys. Res., 79, 1539-1541.
  29. Hollweg, J.V., 1974: Improved limit on photon rest mass, Phys. Rev. Lett., 32, 961-962.
  30. Hollweg, J.V., 1974: On electron heat conduction in the solar wind, J. Geophys. Res., 79, 3845-3850.
  31. Barnes, A. and J.V. Hollweg, 1974: Large-amplitude hydromagnetic waves, J. Geophys. Res., 79, 2302-2318
  32. Hollweg, J.V., 1975: Waves and instabilities in the solar wind, Rev. Geophys. and Space Phys., 13, 263-289.
  33. Hollweg, J.V., 1975: Hydromagnetic waves in interplanetary space, P.A.S.P., 86, 561-594.
  34. Hollweg, J.V., 1975: Alfvén wave refraction in high-speed solar wind streams, J. Geophys. Res., 80, 908-916.
  35. Hollweg, J.V. and G. Skadron, 1975: Fokker-Planck theory for cosmic ray diffusion in the presence of Alfvén waves, 1. Theory, J. Geophys. Res., 80, 2701-2707.
  36. Hollweg, J.V., 1976: Collisionless electron heat conduction in the solar wind, J. Geophys. Res., 81, 1649-1658.
  37. Chang, S.C. and J.V. Hollweg, 1976: Alfvenic acceleration of solar wind helium, 2. Model calculations, J. Geophys. Res., 81, 1659-1663.
  38. Hollweg, J.V. and D.F. Smith, 1976: Current-driven Alfvén instability, J. Plasma Physics, 15, 245-252.
  39. Skadron, G. and J.V. Hollweg, 1976: Fokker-Planck theory for cosmic ray diffusion in the presence of Alfvén waves, 2. Model stream calculations, J. Geophys. Res., 81, 5887-5899.
  40. Hollweg, J.V., 1976: Origin and physical processes in the solar wind, in Reports on Astronomy, G. Contopoulos ed., Trans. I.A.U., XVIA-Part 1, 175-180.
  41. Smith, D.F. and J.V. Hollweg, 1977: Low-frequency instabilities of a warm plasma in a magnetic field. 1. Instabilities driven by field-aligned currents, J. Plasma Phys., 17, 105-122.
  42. Hollweg, J.V. and J.M. Turner, 1978: Acceleration of solar wind He++. 3: Effects of resonant and non-resonant interactions with transverse waves, J. Geophys. Res., 83, 97-133.
  43. Hollweg, J.V., 1978: A quasilinear WKB kinetic theory for nonplanar waves in the non-homogeneous warm plasma. 1: Transverse waves propagating along axisymmetric Bo, J. Geophys. Res., 83, 563-574.
  44. Hollweg, J.V., and C. Lilliequist, 1978: Geometrical MHD wave coupling, J. Geophys. Res., 83, 2030-2036.
  45. Hollweg, J.V., 1978: Alfvén waves in the solar atmosphere, Sol. Phys., 56, 305-333.
  46. Hollweg, J.V., 1978: Some physical processes in the solar wind, Rev. Geophys. Space Phys., 16, 689-720.
  47. Hollweg, J.V., 1978: Fast wave evanescence in the solar corona, Geophys. Res. Lett., 5, 731-734.
  48. Hollweg, J.V., 1979: A new resonance in the solar atmosphere, Solar Phys., 62, 227-240.
  49. Nye, A., and J.V. Hollweg, 1980: Alfvén waves in sunspots, Solar Phys., 68, 279-295.
  50. Querfeld, C., and J.V. Hollweg, 1980: Search for coronal Alfvén waves, Bull. Amer. Astron. Soc., 10, 431.
  51. Edenhofer, P., M.K. Bird, H. Volland, and J.V. Hollweg, 1980, Indirekte Beobachtungen magnetohydrodynamischer Wellenaktivitat in der Sonnenkorona, Mitt. Astron. Ges., 50, 42-45.
  52. Hollweg, J.V., 1981: Cosmic Rays: Solar system effects, Encyclopedia of Physics, 158-160.
  53. Hollweg, J.V., 1981: Helium and heavy ions, Proceedings of the 4th Solar Wind Conference, Burghausen, Report MPAE-W-100-81-31, ed. by H. Rosenbauer, 414-424.
  54. Hollweg, J.V., 1981: Alfvén waves in the solar atmosphere. 2. Open and closed magnetic flux tubes, Solar Phys., 70, 25-66.
  55. Hollweg, J.V., 1981: Heating of the solar wind, in The Sun, ed. by S. Jordan, NASA-SP-405, 355-372.
  56. Hollweg, J.V., 1981: Solar Active Regions: Mechanisms of Energy Supply, in Proceedings of the Skylab Active RegionWorkshop, ed. by F.Q. Orrall, Colorado Associated Univ. Press, 277-318.
  57. Dusenbery, P.B., and J.V. Hollweg, 1981: Ion-Cyclotron heating and acceleration of solar wind minor ions, J. Geophys. Res., 86, 153-164.
  58. Hollweg, J.V., 1981: The physical interpretation of Alfvén wave flux in the solar corona, Mo. Not. Roy. Astron. Soc., 194, 381-382.
  59. Hollweg, J.V., and B. Roberts, 1981: Bound oscillations on thin magnetic flux tubes: convective instability and umbral oscillations, Astrophys. J., 250, 398-407.
  60. Hollweg, J.V., 1981: Minor ions in the low corona, J. Geophys. Res., 86, 8899-8905.
  61. Hollweg, J.V., and P.A. Isenberg, 1981: On rotational forces in the solar wind, J. Geophys. Res., 86, 11,463.
  62. Hollweg, J.V., S. Jackson and D. Galloway, 1982: Alfvén waves in the solar atmosphere. 3. Nonlinear waves on open flux tubes, Solar Phys., 75, 35-61.
  63. Hollweg, J.V., M. Bird, H. Volland, P. Edenhofer, C. Stelzried and B. Seidel, 1982: Possible evidence for coronal Alfvén waves, J. Geophys. Res., 87, 1-8.
  64. Isenberg, P.A. and J.V. Hollweg, 1982: Finite amplitude Alfvén waves in a multi-ion plasma: propagation, acceleration and heating, J. Geophys. Res., 87, 5023-5029.
  65. Hollweg, J.V., 1982: On the origin of solar spicules, Astrophys. J., 257, 345-353.
  66. Hollweg, J.V., 1982: Heating of the corona and solar wind by switch-on shocks, Astrophys. J., 254, 806-813.
  67. Hollweg, J.V., 1982: Surface waves on solar wind tangential discontinuities, J. Geophys. Res., 87, 8065-8076.
  68. Gordon B.E., and J.V. Hollweg, 1983: Collisional damping of surface waves in the solar corona, Astrophys. J., 266, 373-382.
  69. Isenberg, P.A., and J.V. Hollweg, 1983: On the preferential acceleration and heating of solar wind heavy ions, J. Geophys. Res., 88, 3923-3935.
  70. Hollweg, J.V., 1983: Coronal heating by waves, in Solar Wind Five, ed. by M. Neugebauer, 5-21.
  71. Hollweg, J.V., 1984: Resonances of coronal loops, Astrophys. J., 277, 392-403.
  72. Hollweg, J.V., 1984: Alfvenic resonant cavities in the solar atmosphere, simple aspects, Solar Phys., 91, 269-288.
  73. Sterling, A., and J.V. Hollweg, 1984: Alfvenic resonances on solar spicules, Astrophys. J., 285, 843-850.
  74. Hollweg, J.V., and B. Roberts, 1984: Surface solitary waves and solitons, J. Geophys. Res., 89, 9703-9710.
  75. Hollweg, J.V., and A.C. Sterling, 1984: Resonant heating: an interpretation of coronal loop data, Astrophys. J. Letters, 282, L31-L33.
  76. Hollweg, J.V., 1985: Alfvén Waves, McGraw-Hill Encyclopedia of Science and Technology.
  77. Hollweg, J.V., 1985: Alfvenic heating of the chromosphere and corona, in Proc. Sac Peak Chromospheric Workshop, ed. by B. Lites, National Solar Observatory, 235-251.
  78. Mariska, J.T., and J.V. Hollweg, 1985: Alfvenic pulses in the solar atmosphere, Astrophys. J., 296, 746-757.
  79. Hollweg, J.V., 1985: Viscosity in a magnetized plasma: physical interpretation, J. Geophys. Res., 90, 7620-7622.
  80. Hollweg, J.V., 1986: Transition region, corona, and solar wind in coronal holes, J. Geophys. Res., 91, 4111-4125.
  81. Hollweg, J.V., 1986: Energy and momentum transport by waves in the solar atmosphere, in "Advances in Space Plasma Physics", ed. by B. Buti, World Scientific, Singapore, 77-141.
  82. Hollweg, J.V., 1986: Viscosity and the CGL equations in the solar corona, Astrophys. J., 306, 730-739.
  83. Nocera, L., E.R. Priest, and J.V. Hollweg, 1986: Nonlinear development of phase-mixed Alfvén waves, Geophys. Astrophys. Fluid Dyn., 35, 111-129.
  84. Hollweg, J.V., 1986: Resonance absorption of MHD surface waves: physical discussion, Ap. J., 312, 880-885.
  85. Hollweg, J.V., 1987: Resonance absorption of MHD surface waves: viscous effects, Ap. J., 320, 875-883.
  86. Hollweg, J.V., 1987: Incompressible MHD surface waves: nonlinear aspects, Ap. J., 317, 918-925.
  87. Hollweg, J.V., 1987: Small-scale MHD wave processes in the solar atmosphere and solar wind, Proc. 21st ESLAB Symposium, ESA-SP-275, pp. 161-168.
  88. Sterling, A.C., and J.V. Hollweg, 1988: The rebound shock model for solar spicules: dynamics at long times, Ap. J., 327, 950-963.
  89. Hollweg, J.V., and G. Yang, 1988: Resonance absorption of MHD waves at thin surfaces, J. Geophys. Res., 93, 5423-5436.
  90. Hollweg, J.V. and W. Johnson, 1988: Transition region, corona, and solar wind in coronal holes: some 2-fluid models, J. Geophys. Res., 93, 9547-9554.
  91. Hollweg, J.V., 1988: Resonance absorption of solar p-modes by sunspots, Ap. J., 335, 1005-1014.
  92. Hollweg, J.V., 1988: Coronal heating: Theoretical ideas, Proc. IAU General Assembly.
  93. Sterling, A.C., and J.V. Hollweg, 1989: A rebound shock mechanism for solar fibrils, Ap. J., 343, 985-993.
  94. Hollweg, J.V., and M.A. Lee, 1989: Slow twists of solar magnetic flux tubes and the polar magnetic field of the sun, Geophys. Res. Lett., 16, 919-922.
  95. Hollweg, J.V., 1990: Resonance absorption of propagating fast waves in a cold plasma, Planetary Space Sci., 38, 1017-1030.
  96. Hollweg, J.V., G. Yang, V. Cadez and B. Gakovic, 1990: Surface waves in an incompressible fluid: resonant instability due to velocity shear, Ap. J., 349, 335-344.
  97. Hollweg, J.V., 1990: Resonant decay of global MHD modes at 'thick' interfaces, J. Geophys. Res., 95, 2319-2324.
  98. Hollweg, J.V., 1990: MHD waves on solar magnetic flux tubes: a tutorial review, in The Physics of Magnetic Flux Ropes, ed. by C.T. Russell, AGU Geophysical Monograph 58, 23-31.
  99. Hollweg, J.V., 1990: Heating of the solar corona, Computer Phys. Reports, 12, 205-232.
  100. Hollweg, J.V., 1990: On WKB expansions for Alfvén waves in the solar wind, J. Geophys. Res., 95, 14873-14880.
  101. Sakurai, T., M. Goossens, and J.V. Hollweg, 1991: Resonant behavior of MHD waves on magnetic flux tubes 1. connection formulae at the resonant surfaces, Solar Phys., 133, 227-245.
  102. Sakurai, T., M. Goossens, and J.V. Hollweg, 1991: Resonant absorption of waves by magnetic flux tubes 2. absorption of sound waves by sunspots, Solar Phys., 133, 247-262.
  103. Yang, G., and J.V. Hollweg, 1991: The effects of velocity shear on the resonance absorption of MHD surface waves: cold plasma, J. Geophys. Res., 96, 13807-13813.
  104. Hollweg, J.V., 1991: Cosmic rays: solar system effects, in Encyclopedia of Physics (2nd Edition), ed. by R.G. Lerner and G.L. Trigg, VCH Publishers, New York, 198-200.
  105. Hollweg, J.V., 1991: Alfvén waves, in ÒMechanisms of Chromospheric and Coronal HeatingÓ, ed. by P. Ulmschneider, E.R. Priest and R. Rosner, Springer-Verlag, Berlin, pages 423-434.
  106. Hollweg, J.V., 1991: The still enigmatic solar wind, Physics World, Nov. 1991.
  107. Hollweg, J.V., 1992: Wave-particle interactions in the solar wind, in The Astronomy and Astrophysics Encyclopedia, ed. by S.P. Maran, Van Nostrand Reinhold, New York, 338-340.
  108. Goossens, M., J.V. Hollweg, and T. Sakurai, 1992: Resonant behavior of MHD waves on magnetic flux tubes 3. effect of equilibrium flow, Solar Phys., 138, 233-255.
  109. Hollweg, J.V., 1992: Alfvenically-driven slow shocks in the solar chromosphere and corona, Astrophys. J., 389, 731-738.
  110. Hollweg, J.V., 1992: Status of solar wind modeling from the transition region outwards, in ÒSolar Wind SevenÓ, ed. by E. Marsch and R. Schwenn, Pergamon Press, Oxford, pp. 53-60.
  111. Hollweg, J.V., R. Esser, and V. Jayanti, 1993: Modulational and decay instabilities of Alfvén waves: effects of streaming He++, J. Geophys. Res., 98, 3491-3500.
  112. Jayanti, V., and J.V. Hollweg, 1993: On the dispersion relations for parametric instabilities of parallel-propagating Alfvén waves, J. Geophys. Res., 98, 13247-13252.
  113. Goossens, M., and J.V. Hollweg, 1993: Resonant behavior of MHD waves on magnetic flux tubes 4. total resonant absorption and MHD radiating eigenmodes, Solar Phys., 145, 19-44.
  114. Jayanti, V., and J.V. Hollweg, 1993: Parametric instabilities of parallel-propagating Alfvén waves: some analytical results, J. Geophys. Res., 98, 19049-19063.
  115. Jayanti, V., and J.V. Hollweg, 1994: Growth rates of new parametric instabilities occurring in a plasma with streaming He++, J. Geophys. Res., 99, 23449-23459.
  116. Hollweg, J.V., 1994: Beat, modulational, and decay instabilities of a circularly-polarized Alfvén wave, J. Geophys. Res., 99, 23431-23447.
  117. Hollweg, J.V., 1994: Alfvén Waves, revised for the 8th edition of The McGraw-Hill Encyclopedia of Science and Technology.
  118. Goossens, M., M. Ruderman, and J.V. Hollweg, 1995: Dissipative MHD solutions for resonant Alfvén waves in 1-dimensional magnetic flux tubes, Solar Physics, 157, 75-102.
  119. Hollweg, J.V., 1995: Comment on "Nonlinear studies of coronal heating by the resonant absorption of Alfvén waves" by Ofman et al., Geophys. Res. Lett., 22, 2677-2678.
  120. Hollweg, J. V., 1996: "Non-WKB Alfvén waves in the solar wind: propagation and reflection of pulses", in Solar Wind Eight, edited by D. Winterhalter, D. McComas, J. Phillips and N. Murphy, AIP, New York, p.327-330.
  121. Vasquez, B. J., and J. V. Hollweg, 1996: Formation of arc-shaped Alfvén waves and rotational discontinuities from oblique linearly polarized wave trains, J. Geophys. Res., 101, 13527-13540.
  122. Vasquez, B. J., and J. V. Hollweg, 1996: "The making of an Alfvenic fluctuation: resolution of a second-order analysis", in Solar Wind Eight, edited by D. Winterhalter, D. McComas, J. Phillips and N. Murphy, AIP, New York, p.331-335.
  123. Ruderman, M., J.V. Hollweg, and M. Goossens, 1997: Nonlinear theory of resonant slow waves in dissipative layers, Phys. of Plasmas, 4, 75-90.
  124. Ruderman, M., M. Goossens, and J.V. Hollweg, 1997: Nonlinear theory of the interaction of sound waves with an inhomogeneous magnetized plasma in the resonant slow wave layer, Phys. of Plasmas, 4, 91-100.
  125. Hollweg, J.V., and R. Esser, 1997: "The solar corona and solar wind: theoretical issues", in Robotic Exploration Close to the Sun: Scientific Basis, AIP Conference Proceedings 385, ed. by S.R. Habbal, AIP, New York, p.169-183.
  126. Esser, R., S.R. Habbal, W.A. Coles, and J.V. Hollweg, 1997: Hot protons in the inner corona and their effect on the flow properties of the solar wind, J. Geophys. Res., 102, 7063-7074.
  127. Hollweg, J.V., 1997: A simple mechanical model for resonance absorption: the Alfvén resonance, J. Geophys. Res., 102, 24127-24137.
  128. Hollweg, J. V., 1997: Comment on "Gravitational damping of Alfvén waves in stellar atmospheres and winds", Astrophys. J., 488, 895-897.
  129. Ruzmaikin, A., J.D. Anderson, S. Asmar, M. Bird, A. Cacciani, W. Coles, J. Feynman, J. Harvey, K. Harvey, J. Hollweg, J. Linker, Z. Mikic, M. PŠtzold, and E.J. Smith, 1997: A spacecraft going behind the sun will support SOHO, Proc. Fifth SOHO Workshop, ESA SP-404, 653-656, 1997.
  130. Vasquez, B. J., and J. V. Hollweg, 1998: Formation of spherically polarized Alfvén waves and imbedded rotational discontinuities from a small number of entirely oblique waves, J. Geophys. Res., 103, 335-347.
  131. Vasquez, B. J., and J. V. Hollweg, 1998: Formation of imbedded rotational discontinuities with nearly field-aligned normals, J. Geophys. Res., 103, 349-365.
  132. Hollweg, J.V., 1998: Alfvén Waves, revised for the 9th edition of The McGraw-Hill Encyclopedia of Science and Technology.
  133. Hollweg, J.V., 1999: Potential wells, the cyclotron resonance, and ion heating in coronal holes, J. Geophys. Res., 104, 505-520.
  134. Hollweg, J.V., 1999: The kinetic Alfvén wave revisited, J. Geophys. Res, 104, 14811-14819.
  135. Vasquez, B.J., and J.V. Hollweg, 1999: Formation of pressure-balanced structures and fast waves from nonlinear Alfvén waves, J. Geophys. Res., 104, 4681-4696.
  136. Li, X., S.R. Habbal, J.V. Hollweg, and R. Esser, 1999: Heating and cooling of protons by turbulence driven ion cyclotron waves in the fast solar wind, J. Geophys. Res., 104, 2521-2535.
  137. Vasquez, B. J., and J. V. Hollweg, 1999: Nonlinear evolution of Alfvén waves and RDs - hybrid simulations, in Solar Wind Nine, edited by S. R. Habbal, R. Esser, J.V. Hollweg, and P.A. Isenberg, pp.167-172, AIP, Woodbury NY.
  138. Hollweg, J.V., 1999: The cyclotron resonance: heating of protons and oxygen in coronal holes, in Solar Wind Nine, edited by S. R. Habbal, R. Esser, J.V. Hollweg, and P.A. Isenberg, pp.369-372, AIP, Woodbury NY.
  139. Li, X., S.R. Habbal, J.V. Hollweg, and R. Esser, 1999: Proton temperture anisotropy in the fast solar wind: turbulence-driven dispersive ion-cyclotron waves, in Solar Wind Nine edited by S. R. Habbal, R. Esser, J.V. Hollweg, and P.A. Isenberg, pp.531-534, AIP, Woodbury NY.
  140. Edited Book: S. R. Habbal, R. Esser, J.V. Hollweg, and P.A. Isenberg, 1999: editors of "Solar Wind Nine", AIP, Woodbury NY.
  141. Hollweg, J.V., 1999: The cyclotron resonance in coronal holes 1. heating and acceleration of protons, O+5, and Mg+9, J. Geophys. Res., 104, 24781-24791.
  142. Hollweg, J.V., 1999: The cyclotron resonance in coronal holes 2. a two-proton description, J. Geophys. Res., 104, 24793-24805.
  143. Hollweg, J.V., 1999: Resonant heating of protons and ions in coronal holes: two-proton closure, in Proc. 8th SOHO Workshop, ESA SP-446, pp. 357-362.
  144. Hollweg, J.V., 2000: Compressibility of ion-cyclotron and whistler waves: can radio measurements detect high-frequency waves of solar origin in the corona?, J. Geophys. Res., 105, 7573-7581.
  145. Isenberg, P.A., M.A. Lee, and J.V. Hollweg, 2000: A kinetic model of coronal heating and acceleration by ion-cyclotron waves: preliminary results, Solar Phys., 193, 247-257.
  146. Hollweg, J. V., 2000: The cyclotron resonance in coronal holes. 3. a five-beam turbulence-driven model, J. Geophys. Res., 105, 15699-15713.
  147. Isenberg, P. A., M. A. Lee, and J. V. Hollweg, 2001: The kinetic shell model of coronal heating and acceleration by ion-cyclotron waves. 1. outward-propagating waves, J. Geophys. Res., 106, 5649-5660.
  148. Vasquez, B.J., and J.V. Hollweg, 2001: Evolution and dissipation of imbedded rotational discontinuities and Alfven waves in nonuniform plasma and the resultant proton heating, J. Geophys. Res., 106, 5661-5681.
  149. Vasquez, B.J. and eight others including J.V. Hollweg, 2001: The nature of fluctuations on directional discontinuities inside a solar ejection: Wind and IMP-8 observations, J. Geophys. Res., 106, 29283-29298.
  150. Hollweg, J.V., and P.A. Isenberg, 2002: Generation of the fast solar wind: A review with emphasis on the resonant cyclotron interaction, (Invited by the editor of JGR), J. Geophys. Res., 107(A7), 10.1029/2001JA000270.
  151. Hollweg, J.V., and S.A. Markovskii, 2002: Cyclotron resonances of ions with obliquely-propagating waves in coronal holes and the fast solar wind, J. Geophys. Res., 107(A6), 10.1029/2001JA000205.
  152. Markovskii, S.A., and J.V. Hollweg, 2002: Parametric cross-field current instability in solar coronal holes, J. Geophys. Res., 107(A10), 10.1029/2001JA009140.
  153. Markovskii, S.A., and J.V. Hollweg, 2002: Electron heat flux instabilities in coronal holes: implications for ion heating, Geophys. Res. Lett., 29(17), 10.1029/2002GL015189.
  154. Kaghashvili, E. Kh., B.J. Vasquez, and J.V. Hollweg, 2003: Deceleration of streaming alpha particles interacting with waves and imbedded rotational discontinuities, J. Geophys. Res., 108, 10.1029/2002JA009623.
  155. Markovskii, S.A., and J.V. Hollweg, 2003: Ion heating due to plasma microinstabilities in coronal holes and the fast solar wind, in Solar Wind Ten, edited by M. Velli, Amer. Inst. Phys., New York, pp. 307-310.
  156. Hollweg, J.V., 2003: Origin of the fast solar wind: from an electron - driven wind to cyclotron resonances, in Solar Wind Ten, edited by M. Velli, Amer. Inst. Phys., New York, pp. 14-20.
  157. Vasquez, B.J., and J.V. Hollweg, 2003: Nonlinear Alfve\ n waves. I. Interactions between outgoing and ingoing waves according to an amplitude expansion, J. Geophys. Res., in press.
  158. Vasquez, B.J., S.A. Markovskii, and J.V. Hollweg, 2003: Nonlinear Alfve\ n waves. II. The influence of wave advection and finite wavelength effects, J. Geophys. Res., in press.
  159. Markovskii, S.A., and J.V. Hollweg, 2004: Intermittent heating of the solar corona by heat flux generated ion cyclotron waves, Astrophys. J., in press.
  160. Vasquez, B.J., and J.V. Hollweg, 2004: Cross-field energy transfer of a body Alfven wave propagating along and across a pressure-balanced structure, Geophys. Res. Lett., submitted.
  161. Kaghashvili, E.Kh., B.J. Vasquez, G.P. Zank, and J.V. Hollweg, 2004: Deceleration of relative streaming between proton components among nonlinear low-frequency Alfven waves, J. Geophys. Res., submitted.

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