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Evolution of H2O related species in the neutral coma of 67P

André Bieler 1 Kathrin Altwegg 2, 3 Hans Balsiger 2 Akiva Bar-Nun 4 Jean-Jacques Berthelier 5 Peter Bochsler 2 Christelle Briois 6 Ursina Calmonte 2 Michael Combi 1 Johan de Keyser 7 Ewine van Dishoeck 8 Björn Fiethe 9 Stephen Fuselier 10 Sébastien Gasc 2 Tamas I. Gombosi 1 Kenneth Hansen 1 Myrtha Hässig 10 Annette Jäckel 2 Ernest Kopp 2 Axel Korth 11 Léna Le Roy 2 Urs Mall 11 Romain Maggiolo 7 Bernard Marty 12 Olivier Mousis 13 Tobias Owen 14 Henri Rème 15 Martin Rubin 2 Thierry Sémon 2 Chia-Yu Tzou 2 Jack Waite 10 Catherine Walsh 8 Peter Wurz 2, 3 
Abstract : The ROSINA-DFMS mass spectrometer has been probing the coma of 67P since the spacecraft arrived at the comet in August 2014. The acquired data set covers a large range of viewing geometries for the ever changing conditions of 67P along its journey to pericenter. With the high temporal resolution of ROSINA-DFMS we are able to examine diurnal and seasonal changes of different species in the gaseous coma. Large scale heterogeneities in the coma have been reported since the very first measurements of the neutral inventory at 67P. Many of the minor species are seen to follow one of the major compounds, H2O, CO or CO2. In this paper we will present the latest results on H2O related species. We will discuss the possible trapping/building mechanisms responsible for these species and why it is different from other species such as CO, N2 or CO2.
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Submitted on : Thursday, December 24, 2015 - 4:52:47 PM
Last modification on : Monday, July 4, 2022 - 9:31:28 AM


  • HAL Id : insu-01248311, version 1


André Bieler, Kathrin Altwegg, Hans Balsiger, Akiva Bar-Nun, Jean-Jacques Berthelier, et al.. Evolution of H2O related species in the neutral coma of 67P. AGU Fall Meeting 2015, Dec 2015, San Francisco, United States. pp.P33E-01. ⟨insu-01248311⟩



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