J
J. Geiss
Researcher at University of Bern
Publications - 191
Citations - 9683
J. Geiss is an academic researcher from University of Bern. The author has contributed to research in topics: Solar wind & Ion. The author has an hindex of 56, co-authored 191 publications receiving 9427 citations. Previous affiliations of J. Geiss include International Space Science Institute & Goddard Space Flight Center.
Papers
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Journal ArticleDOI
Ion composition and dynamics at comet Halley
Hans Balsiger,Kathrin Altwegg,F. Bühler,J. Geiss,A. G. Ghielmetti,Bruce E. Goldstein,Raymond Goldstein,Wesley T. Huntress,Wing-Huen Ip,Alan J. Lazarus,A. Meier,Marcia Neugebauer,U. Rettenmund,H. Rosenbauer,Rainer Schwenn,R. D. Sharp,E. G. Shelley,E. Ungstrup,D. T. Young +18 more
TL;DR: The Giotto space probe's ion mass spectrometer has obtained data on the composition and velocity distributions of cometary ions at distances of between 7.5 million and 1300 km from the comet Halley nucleus as mentioned in this paper.
Journal ArticleDOI
Correlations of magnetospheric ion composition with geomagnetic and solar activity
TL;DR: In this article, a large ion composition data set consisting of 1-month averages has been assembled for the energy per charge range 0.9 -15.9 keV/e. Data were obtained during the rising and maximum phases of the current solar cycle from May 1977 through November 1981 inclusive.
Book ChapterDOI
Origin of the solar wind from composition data
TL;DR: In this paper, the authors used a superposed-epoch method to investigate the changes in solar wind speed and composition measured during the 9-month period in 1992/93 when Ulysses regularly passed into and out of the southern HSST.
Journal ArticleDOI
Detection of interstellar pick-up hydrogen in the solar system.
George Gloeckler,Antoinette B. Galvin,F. M. Ipavich,J. Geiss,Hans Balsiger,R. von Steiger,Lennard A. Fisk,K. W. Ogilvie,B. Wilken +8 more
TL;DR: From the measured fluxes of pick-up protons and singly charged helium, the number densities of neutral hydrogen and helium in the distant regions of the solar system are estimated to be 0.077 � 0.015 and 0.013 per cubic centimeter, respectively.
Journal ArticleDOI
CELIAS — Charge, Element and Isotope Analysis System for SOHO
D. Hovestadt,Martin Hilchenbach,A. Bürgi,Berndt Klecker,P. Laeverenz,Manfred Scholer,H. Grünwaldt,W. I. Axford,Stefano Livi,Eckart Marsch,B. Wilken,H. P. Winterhoff,F. M. Ipavich,P. Bedini,Michael A. Coplan,Antoinette B. Galvin,George Gloeckler,Peter Bochsler,Hans Balsiger,J. Fischer,J. Geiss,Reinald Kallenbach,Peter Wurz,K.-U. Reiche,Fritz Gliem,Darrell L. Judge,H. S. Ogawa,K. C. Hsieh,Eberhard Möbius,Martin A. Lee,G. G. Managadze,M. I. Verigin,Marcia Neugebauer +32 more
TL;DR: The CELIAS experiment on SOHO is designed to measure the mass, ionic charge and energy of the low and high speed solar wind, of suprathermal ions, and of low energy flare particles as mentioned in this paper.