First observation of energetic neutral atoms in the Venus environment

Autor: Wolfgang Baumjohann, Janet G. Luhmann, Andrei Fedorov, P. Riihela, Bill R. Sandel, Dhiren Kataria, K. C. Hsieh, Karoly Szego, André Galli, K. Brinkfeldt, Pontus Brandt, Janet U. Kozyra, S. M. P. McKenna-Lawlor, C. C. Curtis, Christopher T. Russell, D. R. Linder, Esa Kallio, Stas Barabash, Markus Fraenz, J. R. Scherrer, R. A. Frahm, J. A. Sauvaud, Edmond C. Roelof, H. Koskinen, R. Cerulli-Irelli, Joachim Woch, T. L. Zhang, Andrew J. Coates, Herbert Gunell, A. Grigoriev, Alessandro Mura, Christian Mazelle, Anna Milillo, Stefano Orsini, M. Maggi, Norbert Krupp, Yoshifumi Futaana, Manuel Grande, H. Andersson, J. R. Sharber, Helmut Lammer, J. J. Thocaven, Mats Holmström, Peter Wurz, D. Winningham, Kazushi Asamura, Walter Schmidt, Rickard Lundin, M. Yamauchi, Peter Bochsler, T. Sales
Jazyk: angličtina
Rok vydání: 2008
Předmět:
Zdroj: Planetary and Space Science. 56(6):807-811
ISSN: 0032-0633
Popis: The ASPERA-4 instrument on board the Venus Express spacecraft offers for the first time the possibility to directly measure the emission of energetic neutral atoms (ENAs) in the vicinity of Venus. When the spacecraft is inside the Venus shadow a distinct signal of hydrogen ENAs usually is detected. It is observed as a narrow tailward stream, coming from the dayside exosphere around the Sun direction. The intensity of the signal reaches several 10 5 cm - 2 sr - 1 s - 1 , which is consistent with present theories of the plasma and neutral particle distributions around Venus.
Databáze: OpenAIRE
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