Ionospheric photoelectrons at Venus: Initial observations by ASPERA-4 ELS

A. J. Coates, R. A. Frahm, D. R. Linder, D. O. Kataria, Y. Soobiah, G. Collinson, J. R. Sharber, J. D. Winningham, S. J. Jeffers, S. Barabash, J. A. Sauvaud, R. Lundin, M. Holmström, Y. Futaana, M. Yamauchi, A. Grigoriev, H. Andersson, H. Gunell, A. Fedorov, J. -J. ThocavenT. L. Zhang, W. Baumjohann, E. Kallio, H. Koskinen, J. U. Kozyra, M. W. Liemohn, Y. Ma, A. Galli, P. Wurz, P. Bochsler, D. Brain, E. C. Roelof, P. Brandt, N. Krupp, J. Woch, M. Fraenz, E. Dubinin, S. McKenna-Lawlor, S. Orsini, R. Cerulli-Irelli, A. Mura, A. Milillo, M. Maggi, C. C. Curtis, B. R. Sandel, K. C. Hsieh, K. Szego, A. Asamura, M. Grande

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygl

43 Dyfyniadau(SciVal)

Crynodeb

We report the detection of electrons due to photo-ionization of atomic oxygen and carbon dioxide in the Venus atmosphere by solar helium 30.4 nm photons. The detection was by the Analyzer of Space Plasma and Energetic Atoms (ASPERA-4) Electron Spectrometer (ELS) on the Venus Express (VEx) European Space Agency (ESA) mission. Characteristic peaks in energy for such photoelectrons have been predicted by Venus atmosphere/ionosphere models. The ELS energy resolution (ΔE/E∼7%) means that these are the first detailed measurements of such electrons. Considerations of ion production and transport in the atmosphere of Venus suggest that the observed photoelectron peaks are due primarily to ionization of atomic oxygen.
Iaith wreiddiolSaesneg
Tudalennau (o-i)802-806
Nifer y tudalennau5
CyfnodolynPlanetary and Space Science
Cyfrol56
Rhif cyhoeddi6
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - Mai 2008

Ôl bys

Gweld gwybodaeth am bynciau ymchwil 'Ionospheric photoelectrons at Venus: Initial observations by ASPERA-4 ELS'. Gyda’i gilydd, maen nhw’n ffurfio ôl bys unigryw.

Dyfynnu hyn