Study of the Venusian hydrogen corona with SPICAV on Venus Express

Details Study of the Venusian hydrogen corona with SPICAV on Venus Express Study of the Venusian hydrogen corona with SPICAV on Venus Express

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusm.p34a..02c&link_type=abstract

American Geophysical Union, Spring Meeting 2008, abstract #P34A-02

Other

0310 Airglow And Aurora, 0328 Exosphere, 6295 Venus

Scientific paper

SPICAV-UV on Venus Express is a UV spectrometer identical to SPICAM on Mars Express with a spectral range from 118 to 320 nm. This spectrometer can observe the Venusian Lyman-á emission at 121.6 nm resulting from scattered solar photons by the Venusian hydrogen atoms. The Venusian hydrogen corona has been shown to display a radial distribution with two scale heights, one is corresponding to the normal exospheric temperature and the other is generally attributed to a non-thermal population produced below the exobase. The first Lyman-á emission profiles derived during limb observations of the exosphere by SPICAV, showing these two scale heights will be presented and compared to previous observations. A first estimate of the exospheric temperature and hydrogen density deduced from these observations will be also given.

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