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. Thocaven & 29 others T. 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. Szegö, A. Asamura, M. Grande

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)802-806
Number of pages5
JournalPlanetary and Space Science
Volume56
Issue number6
DOIs
Publication statusPublished - May 2008

Fingerprint

Venus (planet)
Venus
ionospherics
photoelectrons
spectrometer
Venus atmosphere
spectrometers
electron
atmosphere
ionization
electrons
oxygen
space plasmas
European Space Agency
dioxides
helium
ionospheres
energy
photoionization
carbon dioxide

Keywords

  • lonosphere
  • Plasma
  • Venus

ASJC Scopus subject areas

  • Geophysics
  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Coates, A. J., Frahm, R. A., Linder, D. R., Kataria, D. O., Soobiah, Y., Collinson, G., ... Grande, M. (2008). Ionospheric photoelectrons at Venus: Initial observations by ASPERA-4 ELS. Planetary and Space Science, 56(6), 802-806. https://doi.org/10.1016/j.pss.2007.12.008

Ionospheric photoelectrons at Venus : Initial observations by ASPERA-4 ELS. / Coates, A. J.; Frahm, R. A.; Linder, D. R.; Kataria, D. O.; Soobiah, Y.; Collinson, G.; Sharber, J. R.; Winningham, J. D.; Jeffers, S. J.; Barabash, S.; Sauvaud, J. A.; Lundin, R.; Holmström, M.; Futaana, Y.; Yamauchi, M.; Grigoriev, A.; Andersson, H.; Gunell, H.; Fedorov, A.; Thocaven, J. J.; Zhang, T. L.; Baumjohann, W.; Kallio, E.; Koskinen, H.; Kozyra, J. U.; Liemohn, M. W.; Ma, Y.; Galli, A.; Wurz, P.; Bochsler, P.; Brain, D.; Roelof, E. C.; Brandt, P.; Krupp, N.; Woch, J.; Fraenz, M.; Dubinin, E.; McKenna-Lawlor, S.; Orsini, S.; Cerulli-Irelli, R.; Mura, A.; Milillo, A.; Maggi, M.; Curtis, C. C.; Sandel, B. R.; Hsieh, K. C.; Szegö, K.; Asamura, A.; Grande, M.

In: Planetary and Space Science, Vol. 56, No. 6, 05.2008, p. 802-806.

Research output: Contribution to journalArticle

Coates, AJ, Frahm, RA, Linder, DR, Kataria, DO, Soobiah, Y, Collinson, G, Sharber, JR, Winningham, JD, Jeffers, SJ, Barabash, S, Sauvaud, JA, Lundin, R, Holmström, M, Futaana, Y, Yamauchi, M, Grigoriev, A, Andersson, H, Gunell, H, Fedorov, A, Thocaven, JJ, Zhang, TL, Baumjohann, W, Kallio, E, Koskinen, H, Kozyra, JU, Liemohn, MW, Ma, Y, Galli, A, Wurz, P, Bochsler, P, Brain, D, Roelof, EC, Brandt, P, Krupp, N, Woch, J, Fraenz, M, Dubinin, E, McKenna-Lawlor, S, Orsini, S, Cerulli-Irelli, R, Mura, A, Milillo, A, Maggi, M, Curtis, CC, Sandel, BR, Hsieh, KC, Szegö, K, Asamura, A & Grande, M 2008, 'Ionospheric photoelectrons at Venus: Initial observations by ASPERA-4 ELS', Planetary and Space Science, vol. 56, no. 6, pp. 802-806. https://doi.org/10.1016/j.pss.2007.12.008
Coates AJ, Frahm RA, Linder DR, Kataria DO, Soobiah Y, Collinson G et al. Ionospheric photoelectrons at Venus: Initial observations by ASPERA-4 ELS. Planetary and Space Science. 2008 May;56(6):802-806. https://doi.org/10.1016/j.pss.2007.12.008
Coates, A. J. ; Frahm, R. A. ; Linder, D. R. ; Kataria, D. O. ; Soobiah, Y. ; Collinson, G. ; Sharber, J. R. ; Winningham, J. D. ; Jeffers, S. J. ; Barabash, S. ; Sauvaud, J. A. ; Lundin, R. ; Holmström, M. ; Futaana, Y. ; Yamauchi, M. ; Grigoriev, A. ; Andersson, H. ; Gunell, H. ; Fedorov, A. ; Thocaven, J. J. ; Zhang, T. L. ; Baumjohann, W. ; Kallio, E. ; Koskinen, H. ; Kozyra, J. U. ; Liemohn, M. W. ; Ma, Y. ; Galli, A. ; Wurz, P. ; Bochsler, P. ; Brain, D. ; Roelof, E. C. ; Brandt, P. ; Krupp, N. ; Woch, J. ; Fraenz, M. ; Dubinin, E. ; McKenna-Lawlor, S. ; Orsini, S. ; Cerulli-Irelli, R. ; Mura, A. ; Milillo, A. ; Maggi, M. ; Curtis, C. C. ; Sandel, B. R. ; Hsieh, K. C. ; Szegö, K. ; Asamura, A. ; Grande, M. / Ionospheric photoelectrons at Venus : Initial observations by ASPERA-4 ELS. In: Planetary and Space Science. 2008 ; Vol. 56, No. 6. pp. 802-806.
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abstract = "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.",
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T1 - Ionospheric photoelectrons at Venus

T2 - Initial observations by ASPERA-4 ELS

AU - Coates, A. J.

AU - Frahm, R. A.

AU - Linder, D. R.

AU - Kataria, D. O.

AU - Soobiah, Y.

AU - Collinson, G.

AU - Sharber, J. R.

AU - Winningham, J. D.

AU - Jeffers, S. J.

AU - Barabash, S.

AU - Sauvaud, J. A.

AU - Lundin, R.

AU - Holmström, M.

AU - Futaana, Y.

AU - Yamauchi, M.

AU - Grigoriev, A.

AU - Andersson, H.

AU - Gunell, H.

AU - Fedorov, A.

AU - Thocaven, J. J.

AU - Zhang, T. L.

AU - Baumjohann, W.

AU - Kallio, E.

AU - Koskinen, H.

AU - Kozyra, J. U.

AU - Liemohn, M. W.

AU - Ma, Y.

AU - Galli, A.

AU - Wurz, P.

AU - Bochsler, P.

AU - Brain, D.

AU - Roelof, E. C.

AU - Brandt, P.

AU - Krupp, N.

AU - Woch, J.

AU - Fraenz, M.

AU - Dubinin, E.

AU - McKenna-Lawlor, S.

AU - Orsini, S.

AU - Cerulli-Irelli, R.

AU - Mura, A.

AU - Milillo, A.

AU - Maggi, M.

AU - Curtis, C. C.

AU - Sandel, B. R.

AU - Hsieh, K. C.

AU - Szegö, K.

AU - Asamura, A.

AU - Grande, M.

PY - 2008/5

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N2 - 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.

AB - 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.

KW - lonosphere

KW - Plasma

KW - Venus

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U2 - 10.1016/j.pss.2007.12.008

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SP - 802

EP - 806

JO - Planetary and Space Science

JF - Planetary and Space Science

SN - 0032-0633

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