Mann, G.; Classen, H. T.; Keppler, E.; Roelof, E. C.: On electron acceleration at CIR related shock waves. Astronomy and Astrophysics 391, pp. 749 - 756 (2002)
Heber, B.; Keppler, E.; Marsden, R.; Tranquille, C.; Blake, B. J.; Fränz, M.: The Evolution of the anomalous cosmic ray oxygen spectra during U}lysses slow descent in 1995 to 1998: {COSPIN/LET} and {EPAC observations. Space Science Reviews 97, pp. 363 - 366 (2001)
Heber, B.; Keppler, E.; Marsden, R.-G.; Tranquille, C.; Blake, B.; Fränz, M.: The evolution of the anomalous cosmic ray oxygen spectra from 1995 to 1998: Ulysses observations. Space Science Reviews 97, pp. 363 - 366 (2001)
Classen, H.-T.; Mann, G.; Forsyth, R. J.; Keppler, E.: Low frequency plasma turbulence and higher energy particles at CIR-related shock waves. Astronomy and Astrophysics 347, pp. 313 - 320 (1999)
Fränz, M.; Keppler, E.; Lauth, U.; Reuss, M. K.; Mason, G. M.; Mazur, J. E.: Energetic particle abundances at CIR shocks. Geophysical Research Letters 26 (1), pp. 17 - 20 (1999)
Kunow, H.; Lee, M. A.; Forsyth, R. J.; Heber, B.; Horbury, T. S.; Keppler, E.; Kota, J.; Lou, Y.-Q.; McKibben, R. B.; Paizis, C.et al.; Potgieter Roelof, E. C.; Sanderson, T. R.; Simnett, G. M.; von Steiger, R.; Tsurutani, B. T.; Wimmer-Schweingruber, R. F.; Jokipii, J. R.: Corotating Interaction Regions at high latitudes. Space Science Reviews 89, pp. 221 - 268 (1999)
Mason, G. M.; Gloeckler, G.; Hilchenbach, M.; Kallenbach, R.; Keppler, E.: Origin, Injection and Acceleration of CIR Particles: Observations - Composition: Averages, Time Variations; Radial and Latitude Variations. Space Science Reviews 89 (1-2), pp. 351 - 359 (1999)
Mason, G. M.; von Steiger, R.; Decker, R. B.; Desai, M. I.; Dwyer, J. R.; Fisk, L. A.; Gloeckler, G.; Gosling, J. T.; Hilchenbach, M.; Kallenbach, R.et al.; Keppler, E.; Klecker, B.; Kunow, H.; Mann, G.; Richardson, I. G.; Sanderson, T. R.; Simnett, G. M.; Wang, Y.-M.; Wimmer-Schweingruber, R. F.; Fränz, M.; Mazur, J. E.: Origin, injection, and acceleration of CIR particles: Observations. Space Science Reviews 89, pp. 327 - 367 (1999)
Classen, H. T.; Mann, G.; Keppler, E.: Particle acceleration efficiency and MHD characteristics of CIR-related shocks. Astronomy and Astrophysics 335, pp. 1101 - 1110 (1998)
Keppler, E.: What causes the variations of the peak intensity of CIR accelerated energetic ion fluxes? Annales Geophysicae 16 (12), pp. 1552 - 1556 (1998)
Keppler, E.: The acceleration of charged particles in Corotating Interaction Regions (CIR) - A review with particular emphasis on the Ulysses mission. Surveys in Geophysics 19, pp. 211 - 278 (1998)
Keppler, E.: The acceleration of charged particles in Corotating Interaction Regions (CIR) - A review with particular emphasis on the ULYSSES mission -. Mitt. a.d. MPI für Aeronomie (MPAE-W-813-98-04) (1998)
Blake, J. B.; Looper, M. D.; Keppler, E.; Heber, B.; Kunow, H.; Quenby, J. J.: Ulysses observations of short-period (( 30 days) modulation of the galactic cosmic rays. Geophysical Research Letters 24, pp. 671 - 674 (1997)
Fränz, M.; Burgess, D.; Keppler, E.; Reuss, M. K.; Blake, J. B.: Energetic particle anisotropies and remote magnetic connection at high solar latitudes. Advances in Space Research 19, pp. 855 - 858 (1997)
Krupp, N.; Keppler, E.; Seidel, R.; Woch, J.; Korth, A.; Cheng, A. F.; Hawkins III, S. E.; Lanzerotti, L. J.; Maclennan, C. G.; Dougherty, M. K.: Field-aligned particle streaming in the duskside high latitude Jovian magnetosphere. Advances in Space Research 20, pp. (2)225 - (2)228 (1997)
Seidel, R.; Keppler, E.; Krupp, N.; Woch, J.; Hawkins III, S. E.; Lanzerotti, L. J.; Dougherty, M. K.: Energetic electron beams in the duskside Jovian magnetosphere: Ulysses EPAC and HI-SCALE measurements. Planetary and Space Science 45, pp. 1473 - 1480 (1997)
First Light for Sunrise III: the first tests with real sunlight were successful. The balloon-borne solar observatory should be ready for launch at the end of May.
First icy cold, then midnight sun: at the Arctic Circle, the team will prepare the next flight of the balloon-borne solar observatory - and hopes for solar fireworks.
Astronomical teamwork: By combining data from Solar Orbiter and SDO, a group of researchers has unambiguously determined the magnetic field at the solar surface.
The magnetic field in the solar atmosphere exceeds the geomagnetic field strength by four orders of magnitude. It greatly influences the processes of energy transport within the solar atmosphere, and dominates the morphology of the solar chromosphere and corona. Kinetic energy from convective motions in the Sun can be efficiently stored in magnetic fields and subsequently released - to heat the solar corona to several million degrees or to blast off coronal mass ejections.