Universität zu Köln

Mendillo, M., Trovato, J., Narvaez, C., Withers, P., Paetzold, M., Peter, K., Tellmann, S. and Haeusler, B. (2020). The ionosphere of Venus: Strongest control by photo-chemical-equilibrium in the solar system, with implications for exospheric temperatures. Icarus, 349. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE. ISSN 1090-2643

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Abstract

Profiles of electron density versus height obtained by the radio occultation experiment on Venus Express provide an observational data base suitable for semi-empirical modeling. The basic equations of photo-chemicalequilibrium (PCE) theory can be applied to the altitude range 100-170 km of Venus' ionosphere (Peter et al., 2014). Within that domain, the maximum electron density (N-max) and total electron content (TEC) show very high correlations (0.98) with parameterizations of solar flux and solar zenith angle. Validation using independent profiles from the Venera 15/16 radio occultation experiments yielded an even higher correlation (0.99). Such dominance of PCE ionospheric processes at Venus is the highest in the solar system. This allows for N-max and TEC to be used to derive estimates of the exospheric temperature of Venus' thermosphere at similar to 170 km.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Mendillo, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Trovato, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Narvaez, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Withers, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Paetzold, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Peter, K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tellmann, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Haeusler, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-317864
DOI:	10.1016/j.icarus.2020.113870
Journal or Publication Title:	Icarus
Volume:	349
Date:	2020
Publisher:	ACADEMIC PRESS INC ELSEVIER SCIENCE
Place of Publication:	SAN DIEGO
ISSN:	1090-2643
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language EQUIVALENT SLAB THICKNESS; PEAK ELECTRON-DENSITY; MONOCHROMATIC RADIATION; ATMOSPHERE; MARS; THERMOSPHERE; MODEL; TERRESTRIAL; ABSORPTION; EXPRESS Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/31786