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46 results on '"Jokipii, J.R."'

7. CIR Morphology, Turbulence, Discontinuities, and Energetic Particles

Author

Crooker, N.U., Gosling, J.T., Bothmer, V., Forsyth, R.J., Gazis, P.R., Hewish, A., Horbury, T.S., Intriligator, D.S., Jokipii, J.R., Kóta, J., Lazarus, A.J., Lee, M.A., Lucek, E., Marsch, E., Posner, A., Richardson, I.G., Roelof, E.C., Schmidt, J.M., Siscoe, G.L., Tsurutani, B.T., and Wimmer-Schweingruber, R.F.

Published
1999
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11. Corotating Interaction Regions at High Latitudes

Author

Kunow, H., Lee, M.A., Fisk, L.A., Forsyth, R.J., Heber, B., Horbury, T.S., Keppler, E., Kóta, J., Lou, Y.-Q., McKibben, R.B., Paizis, C., Potgieter, M.S., Roelof, E.C., Sanderson, T.R., Simnett, G.M., Von Steiger, R., Tsurutani, B.T., Wimmer-Schweingruber, R.F., and Jokipii, J.R.

Published
1999
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13. Anomalous Cosmic Rays

Author

Klecker, B., Mewaldt, R.A., Bieber, J.W., Cummings, A.C., Drury, L., Giacalone, J., Jokipii, J.R., Jones, F.C., Krainev, M.B., Lee, M.A., Le Roux, J.A., Marsden, R.G., Mcdonald, F.B., McKibben, R.B., Steenberg, C.D., Baring, M.G., Ellison, D.C., Lanzerotti, L.J., Leske, R.A., Mazur, J.E., Moraal, H., Oetliker, M., Ptuskin, V.S., Selesnick, R.S., and Trattner, K.J.

Published
1998
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28. The Sun from Space

Author

Jokipii, J.R.

Subjects
The Sun from Space (Nonfiction work) -- Book reviews, Books -- Book reviews, Science and technology
Abstract

The Sun from Space by Kenneth R. Lang Springer, New York, 2000. 373 pp. $64.95, DM129. ISBN 3-540-66944-2. The Sun has fascinated mankind for eons, and must surely have been [...]

Published
2001

29. Our interstellar neighborhood

Author

Jokipii, J.R.

Subjects
Magnetic fields -- Research, Interstellar matter -- Research, Solar wind -- Research, Science and technology, Research
Abstract

On page 1447 of this issue, Lallement et al. report exciting new observations of the local interstellar medium, just beyond the boundary of the heliosphere (the region influenced by our [...]

Published
2005

30. Corotating variations of cosmic rays near the south heliospheric pole

Author

Kota, J. and Jokipii, J.R.

Subjects
Ulysses (Space probe) -- Observations, Sun -- Observations, Cosmic rays -- Observations, Science and technology, Observations
Abstract

Three-dimensional simulations of the heliospheric modulation of galactic cosmic ray protons show that corotating variations in the intensity can persist to quite high heliographic latitudes. Variations are seen at latitudes considerably higher than the maximum latitude extension of the heliographic current sheet, in regions where the solar wind velocity and magnetic field show no significant variation. Similar conclusions may apply also to lower energy particles, which may be accelerated at lower latitudes. Cosmic ray variations caused by corotating interaction regions present at low heliographic latitudes can propagate to significantly higher latitudes., Observations of periodic variations of the cosmic ray intensity, associated with corotating regions in the solar wind, are a useful diagnostic of the modes of transport of cosmic rays. Kunow [...]

Published
1995

31. Origin, Injection, and Acceleration of CIR Particles: Theory Report of Working Group 7

Author

Dept. of Atmospheric and Space Sciences, University of Michigan, Ann Arbor, Michigan, USA, Astrophysikalisches Institut Potsdam, Potsdam, Germany, Institute for Problems of Mechanics, Russian Academy of Sciences, Moscow, Russia, Dept. of Astronomy and IPST, University of Maryland, College Park, Maryland, USA, Depts. of Planetary Sciences and Astronomy, University of Arizona, Tucson, Arizona, USA, International Space Science Institute, Bern, Switzerland, Max-Planck-Institut für Aeronomie, Katlenburg-Lindau, Germany, Extraterrestrische Physik, Universität Kiel, Kiel, Germany, Space Science Center, University of New Hampshire, Durham, New Hampshire, USA, Space Science Dept. of ESA ESTEC, Noordwijk, The Netherlands, Physics and Astronomy Dept., University of Birmingham, Birmingham, United Kingdom, Max-Planck-Institut für Extraterrestrische Physik, Garching, Germany, Ann Arbor, Simnett, G.M., Kóta, J., Kallenbach, R., Scholer, M., Mann, G., Chalov, S., Desai, M.I., Fisk, Len A., Jokipii, J.R., Keppler, E., Kunow, H., Lee, M.A., Sanderson, T.R., Dept. of Atmospheric and Space Sciences, University of Michigan, Ann Arbor, Michigan, USA, Astrophysikalisches Institut Potsdam, Potsdam, Germany, Institute for Problems of Mechanics, Russian Academy of Sciences, Moscow, Russia, Dept. of Astronomy and IPST, University of Maryland, College Park, Maryland, USA, Depts. of Planetary Sciences and Astronomy, University of Arizona, Tucson, Arizona, USA, International Space Science Institute, Bern, Switzerland, Max-Planck-Institut für Aeronomie, Katlenburg-Lindau, Germany, Extraterrestrische Physik, Universität Kiel, Kiel, Germany, Space Science Center, University of New Hampshire, Durham, New Hampshire, USA, Space Science Dept. of ESA ESTEC, Noordwijk, The Netherlands, Physics and Astronomy Dept., University of Birmingham, Birmingham, United Kingdom, Max-Planck-Institut für Extraterrestrische Physik, Garching, Germany, Ann Arbor, Simnett, G.M., Kóta, J., Kallenbach, R., Scholer, M., Mann, G., Chalov, S., Desai, M.I., Fisk, Len A., Jokipii, J.R., Keppler, E., Kunow, H., Lee, M.A., and Sanderson, T.R.

Abstract

On the basis of the observational picture established in the report of Mason, von Steiger et al. (1999) the status of theoretical models on origin, injection, and acceleration of particles associated with Corotating Interaction Regions (CIRs) is reviewed. This includes diffusive or first-order Fermi acceleration at oblique shocks, adiabatic deceleration in the solar wind, stochastic acceleration in Alfvén waves and oblique propagating magnetosonic waves, and shock surfing as possible injection mechanism to discriminate pickup ions from solar wind ions.

Published
2006

32. Global Processes that Determine Cosmic Ray Modulation

Author

Dept. of Atmospheric, Oceanic, and Space Sciences, Univ. of Michigan, Ann Arbor, MI, 48109, USA, Lebedev Physical Institute, Russian Academy of Sciences, Moscow, 117924, Russia, Institut für Experimentelle und Angewandte Physik, Universität Kiel, 24118, Kiel, Germany, Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya, Japan, Potchefstroom University for CHE, Potchefstroom, South Africa, Enrico Fermi Institute and Dept. of Physics, The University of Chicago, Chicago, IL, 60637, USA, California Institute of Technology, Pasadena, CA, 91125, USA, Space Science Department of ESA, ESTEC, NL-2200 AG, Noordwijk, The Netherlands, The Blackett Laboratory, Imperial College, London, SW7 2BZ, United Kingdom, Bartol Research Institute, University of Delaware, Newark, DE, 19716, USA, University of Arizona, Tucson, AZ, 85721, USA, Institute for Physical Science and Technology, Univ. of Maryland, College Park, MD, 20742, USA, NASA Marshall Space Flight Center/ES82, Huntsville, AL, 35812, USA, New Mexico State University, Las Cruces, NM, 88003-001, USA, CEA, DSM/DAPNIA/Service d'Astrophysique, CE-Saclay, F-91191, Gif-sur-Yvette Cedex, France, Space Science Center, University of New Hampshire, Durham, NH, 03842, USA, Ann Arbor, Fisk, Len A., Wenzel, K.-P., Balogh, A., Burger, R.A., Cummings, A.C., Evenson, P., Heber, B., Jokipii, J.R., Krainev, M.B., Kóta, J., Kunow, H., Le Roux, J.A., McDonald, F.B., McKibben, R.B., Potgieter, M.S., Simpson, J.A., Steenberg, C.D., Suess, S., Webber, W.R., Wibberenz, G., Zhang, M., Ferrando, P., Fujii, Z., Lockwood, J.A., Moraal, H., Stone, E.C., Dept. of Atmospheric, Oceanic, and Space Sciences, Univ. of Michigan, Ann Arbor, MI, 48109, USA, Lebedev Physical Institute, Russian Academy of Sciences, Moscow, 117924, Russia, Institut für Experimentelle und Angewandte Physik, Universität Kiel, 24118, Kiel, Germany, Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya, Japan, Potchefstroom University for CHE, Potchefstroom, South Africa, Enrico Fermi Institute and Dept. of Physics, The University of Chicago, Chicago, IL, 60637, USA, California Institute of Technology, Pasadena, CA, 91125, USA, Space Science Department of ESA, ESTEC, NL-2200 AG, Noordwijk, The Netherlands, The Blackett Laboratory, Imperial College, London, SW7 2BZ, United Kingdom, Bartol Research Institute, University of Delaware, Newark, DE, 19716, USA, University of Arizona, Tucson, AZ, 85721, USA, Institute for Physical Science and Technology, Univ. of Maryland, College Park, MD, 20742, USA, NASA Marshall Space Flight Center/ES82, Huntsville, AL, 35812, USA, New Mexico State University, Las Cruces, NM, 88003-001, USA, CEA, DSM/DAPNIA/Service d'Astrophysique, CE-Saclay, F-91191, Gif-sur-Yvette Cedex, France, Space Science Center, University of New Hampshire, Durham, NH, 03842, USA, Ann Arbor, Fisk, Len A., Wenzel, K.-P., Balogh, A., Burger, R.A., Cummings, A.C., Evenson, P., Heber, B., Jokipii, J.R., Krainev, M.B., Kóta, J., Kunow, H., Le Roux, J.A., McDonald, F.B., McKibben, R.B., Potgieter, M.S., Simpson, J.A., Steenberg, C.D., Suess, S., Webber, W.R., Wibberenz, G., Zhang, M., Ferrando, P., Fujii, Z., Lockwood, J.A., Moraal, H., and Stone, E.C.

Abstract

The global processes that determine cosmic ray modulation are reviewed. The essential elements of the theory which describes cosmic ray behavior in the heliosphere are summarized, and a series of discussions is presented which compare the expectations of this theory with observations of the spatial and temporal behavior of both galactic cosmic rays and the anomalous component; the behavior of cosmic ray electrons and ions; and the 26-day variations in cosmic rays as a function of heliographic latitude. The general conclusion is that the current theory is essentially correct. There is clear evidence, in solar minimum conditions, that the cosmic rays and the anomalous component behave as is expected from theory, with strong effects of gradient and curvature drifts. There is strong evidence of considerable latitude transport of the cosmic rays, at all energies, but the mechanism by which this occurs is unclear. Despite the apparent success of the theory, there is no single choice for the parameters which describe cosmic ray behavior, which can account for all of the observed temporal and spatial variations, spectra, and electron vs. ion behavior.

Published
2006

33. Corotating Interaction Regions at High Latitudes

Author

Dept. of Atmospheric and Space Sciences, University of Michigan, Ann Arbor, Michigan, USA, Extraterrestrische Physik, Universit??t Kiel, Kiel, Germany, Space Science Center, University of New Hampshire, Durham, New Hampshire, USA, The Blackett Laboratory, Imperial College, London, United Kingdom, Max-Planck-Institut f??r Aeronomie, Katlenburg-Lindau, Germany, The Blackett Laboratory, Imperial College, London, United Kingdom; Queen Mary and Westfield College, London, United Kingdom, Depts. of Planetary Sciences and Astronomy, University of Arizona, Tucson, Arizona, USA, Dipartimento di Fisica, Universit?? di, Milano, Milano, Italy, Enrico Fermi Institute, University of Chicago, Chicago, Illinois, USA, Potchefstroom University for CHE, Potchefstroom, South Africa, Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland, USA, Space Science Dept.,???ESA/ESTEC, Noordwijk, The Netherlands, Physics and Astronomy Dept., University of Birmingham, Birmingham, United Kingdom, International Space Science Institute, Bern, Switzerland, Jet Propulsion Laboratory, Pasadena, California, USA, Physikalisches Institut der Universit??t Bern, Bern, Switzerland, Ann Arbor, Potgieter, M.S., Von Steiger, R., Sanderson, T.R., Kunow, H., Lee, M.A., Fisk, Len A., Heber, B., Keppler, E., Lou, Y.-Q., McKibben, R.B., Paizis, C., Roelof, E.C., Simnett, G.M., Tsurutani, B.T., Wimmer-Schweingruber, R.F., Jokipii, J.R., Forsyth, R.J., Horbury, T.S., K??ta, J., Dept. of Atmospheric and Space Sciences, University of Michigan, Ann Arbor, Michigan, USA, Extraterrestrische Physik, Universit??t Kiel, Kiel, Germany, Space Science Center, University of New Hampshire, Durham, New Hampshire, USA, The Blackett Laboratory, Imperial College, London, United Kingdom, Max-Planck-Institut f??r Aeronomie, Katlenburg-Lindau, Germany, The Blackett Laboratory, Imperial College, London, United Kingdom; Queen Mary and Westfield College, London, United Kingdom, Depts. of Planetary Sciences and Astronomy, University of Arizona, Tucson, Arizona, USA, Dipartimento di Fisica, Universit?? di, Milano, Milano, Italy, Enrico Fermi Institute, University of Chicago, Chicago, Illinois, USA, Potchefstroom University for CHE, Potchefstroom, South Africa, Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland, USA, Space Science Dept.,???ESA/ESTEC, Noordwijk, The Netherlands, Physics and Astronomy Dept., University of Birmingham, Birmingham, United Kingdom, International Space Science Institute, Bern, Switzerland, Jet Propulsion Laboratory, Pasadena, California, USA, Physikalisches Institut der Universit??t Bern, Bern, Switzerland, Ann Arbor, Potgieter, M.S., Von Steiger, R., Sanderson, T.R., Kunow, H., Lee, M.A., Fisk, Len A., Heber, B., Keppler, E., Lou, Y.-Q., McKibben, R.B., Paizis, C., Roelof, E.C., Simnett, G.M., Tsurutani, B.T., Wimmer-Schweingruber, R.F., Jokipii, J.R., Forsyth, R.J., Horbury, T.S., and K??ta, J.

Abstract

Ulysses observed a stable strong CIR from early 1992 through 1994 during its first journey into the southern hemisphere. After the rapid latitude scan in early 1995, Ulysses observed a weaker CIR from early 1996 to mid-1997 in the northern hemisphere as it traveled back to the ecliptic at the orbit of Jupiter. These two CIRs are the observational basis of the investigation into the latitudinal structure of CIRs. The first CIR was caused by an extension of the northern coronal hole into the southern hemisphere during declining solar activity, whereas the second CIR near solar minimum activity was caused by small warps in the streamer belt. The latitudinal structure is described through the presentation of three 26-day periods during the southern CIR. The first at???24??S shows the full plasma interaction region including fast and slow wind streams, the compressed shocked flows with embedded stream interface and heliospheric current sheet (HCS), and the forward and reverse shocks with associated accelerated ions and electrons. The second at 40??S exhibits only the reverse shock, accelerated particles, and the 26-day modulation of cosmic rays. The third at 60??S shows only the accelerated particles and modulated cosmic rays. The possible mechanisms for the access of the accelerated particles and the CIR-modulated cosmic rays to high latitudes above the plasma interaction region are presented. They include direct magnetic field connection across latitude due to stochastic field line weaving or to systematic weaving caused by solar differential rotation combined with non-radial expansion of the fast wind. Another possible mechanism is particle diffusion across the average magnetic field, which includes stochastic field line weaving. A constraint on connection to a distant portion of the CIR is energy loss in the solar wind, which is substantial for the relatively slow-moving accelerated ions. Finally, the weaker northern CIR is compared with the southern CIR. It is weak

Published
2006

45. Cosmic rays in interplanetary magnetic fields

Author

Jokipii, J.R.

Subjects
Cosmic Rays in Interplanetary Magnetic Fields (Book), Books -- Book reviews, Science and technology
Abstract

Cosmic Rays in Interplanetary Magnetic Fields. I. N. TOPTYGIN. Reidel, Dordrecht, 1985 (U.S. distributor, Kluwer, Hingham, MA). xiv, 375 pp., illus. $64.50. Translated from the Russian edition (Moscow, 1983) by [...]

Published
1986

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