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On the diamagnetic effect associated with the ion pile-up region in the coma of comet Halley
Neubauer, F. M.; Israelevich, P. L.; Ershkovich, A. I.
The ion pile-up region in the comet Halley ionosphere observed on the inbound leg of the Giotto trajectory is accompanied by a decrease of the magnetic field strength. This magnetic field dip is explained by means of a diamagnetic effect of the plasma density increase in the pile-up region. Maximum of the plasma pressure seems to coincide with the…
The turbulent state of cometary ion pickup generated fluctuations near comet P/Halley
Krauklis, I.; Johnstone, A. D.
One of the principal effects of an outgassing comet is to introduce additional mass into the solar wind flow. This mass-loading process results in the generation of Alfvén waves via ion-cyclotron resonance. In the case of the Halley encounter this source of ``new'' fluctuations was introduced into a low speed solar wind 0.89 AU from the sun. Previ…
State of the art, lightweight scientific experiments available for small to micro satellite missions
McKenna-Lawlor, Susan M. P.
A selection of light weight scientific instruments originally designed for major international missions but which, because of their modest resource requirements, can now in addition be flown aboard ' small' to ' micro' satellites are, briefly, described. These instruments have the capability to either make measurements of constituents of the Earth…
The shape of a sublimating ice surface at the bottom of a non-volatile cylinder: Monte Carlo simulations and 2-D analysis
Keller, H. U.; Markiewicz, W. J.; Skorov, Yu. V.
Gas flow rate at a cometary surface depends on the microscopic structure of the porous dust-ice material that makes up the nucleus. The standard model for the structure of such material is a bundle of cylindrical, non-crossing tubes. Even within this idealized model the emergent flux depends on the shape of the sublimating ice surface at the botto…