@article{discovery398860, number = {3}, title = {Pick-up ions and associated wave energy transport at Comet P/Halley: A case study}, year = {1997}, volume = {24}, journal = {Geophysical Research Letters}, pages = {305 -- 308}, month = {February}, note = {Copyright 1997 by the American Geophysical Society}, author = {S{\"o}ding, A and Glassmeier, K-H and Johnstone, A and Neubauer, FM and Coates, AJ}, url = {http://dx.doi.org/10.1029/97GL00105}, abstract = {During the flyby of the spacecraft Giotto at comet p/Halley Poynting vectors and Els{\"a}sser variables have been determined to study wave propagation directions. The observed wave properties are compared with the theoretically predicted RH ?, LH + and LH ? wave modes. Between 10:36 and 19:11 SCET on March 13, 1986 the predicted dominating energy propagation direction mostly corresponds with the observed one. Only between 12:11 and 13:44 SCET there is no agreement. In this region the excitation of waves is dominated by pick-up ions which are not locally implanted ions in the solar wind but have been picked-up outside the plasma regime studied, and whose free energy is not already used up.}, issn = {0094-8276}, keywords = {Solar-wind, Elsasser variables, Halley, Turbulence} }