Abstract
The Ly α measurements of the hydrogen corona of Venus by Mariners 5 (ref. 1) and 10 (ref. 2) have been shown to be consistent with a two temperature component model. Bertaux et al.3 have successfully fitted the Venera 9 exospheric Ly α data with an elevated (500 K) single temperature; however, they also indicated that their data are not inconsistent with a two component model. Various source mechanisms have been proposed to explain the ‘hot’ (∼1,000 K), energetic component of the hydrogen corona. Here we use recent results from the Pioneer Venus Orbiter (PVO)4 to establish the major sources of this hot hydrogen population.
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Cravens, T., Gombosi, T. & Nagy, A. Hot hydrogen in the exosphere of Venus. Nature 283, 178–180 (1980). https://doi.org/10.1038/283178a0
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DOI: https://doi.org/10.1038/283178a0
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