Estimates of the size of the ionosphere of comet 67P/churyumov-gerasimenko during its perihelion passage in 2014/2015

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1 引文 斯高帕斯(Scopus)

摘要

The Rosetta mission will begin its comet rendezvous and lander mission in mid 2014. The plasma instruments onboard Rosetta will provide detailed measurements of the plasma environment of comet 67P/Churyumov-Gerasimenko and its responses to solar wind interaction. In this chapter the basic scale lengths connected to the dimension of the radial-expanding magnetic field-free ionosphere and to the boundary separating photoelectrons cooled by collisional interaction with water molecules, respectively, are explained. Their variations at different heliocentric distances along the orbit of comet 67P are described. It is found that the radii of the diamagnetic ionospheric cavity (35 km at perihelion) and that of the cold photoelectron zone (350 km at perihelion) are all much smaller than those of comet Halley. These theoretical estimates will be tested by the upcoming in situ plasma measurements and remote-sensing observations onboard the Rosetta spacecraft.

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主出版物標題Planetary Exploration and Science
主出版物子標題Recent Results and Advances
發行者Springer Berlin Heidelberg
頁面271-278
頁數8
ISBN(電子)9783662450529
ISBN(列印)9783662450512
DOIs
出版狀態已出版 - 1 1月 2015

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