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Johan De Keyser
Johan De Keyser
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67P/Churyumov-Gerasimenko, a Jupiter family comet with a high D/H ratio
K Altwegg, H Balsiger, A Bar-Nun, JJ Berthelier, A Bieler, P Bochsler, ...
Science 347 (6220), 1261952, 2015
5822015
Prebiotic chemicals—amino acid and phosphorus—in the coma of comet 67P/Churyumov-Gerasimenko
K Altwegg, H Balsiger, A Bar-Nun, JJ Berthelier, A Bieler, P Bochsler, ...
Science advances 2 (5), e1600285, 2016
5712016
Rosina–Rosetta orbiter spectrometer for ion and neutral analysis
H Balsiger, K Altwegg, P Bochsler, P Eberhardt, J Fischer, S Graf, ...
Space Science Reviews 128, 745-801, 2007
4582007
Inventory of the volatiles on comet 67P/Churyumov-Gerasimenko from Rosetta/ROSINA
L Le Roy, K Altwegg, H Balsiger, JJ Berthelier, A Bieler, C Briois, ...
Astronomy & Astrophysics 583, A1, 2015
3512015
Abundant molecular oxygen in the coma of comet 67P/Churyumov–Gerasimenko
A Bieler, K Altwegg, H Balsiger, A Bar-Nun, JJ Berthelier, P Bochsler, ...
Nature 526 (7575), 678-681, 2015
3362015
Time variability and heterogeneity in the coma of 67P/Churyumov-Gerasimenko
M Hässig, K Altwegg, H Balsiger, A Bar-Nun, JJ Berthelier, A Bieler, ...
Science 347 (6220), aaa0276, 2015
2932015
Molecular nitrogen in comet 67P/Churyumov-Gerasimenko indicates a low formation temperature
M Rubin, K Altwegg, H Balsiger, A Bar-Nun, JJ Berthelier, A Bieler, ...
Science 348 (6231), 232-235, 2015
2242015
Evolution of water production of 67P/Churyumov–Gerasimenko: an empirical model and a multi-instrument study
KC Hansen, K Altwegg, JJ Berthelier, A Bieler, N Biver, ...
Monthly Notices of the Royal Astronomical Society 462 (Suppl_1), S491-S506, 2016
2182016
Xenon isotopes in 67P/Churyumov-Gerasimenko show that comets contributed to Earth's atmosphere
B Marty, K Altwegg, H Balsiger, A Bar-Nun, DV Bekaert, JJ Berthelier, ...
Science 356 (6342), 1069-1072, 2017
1952017
Organics in comet 67P–a first comparative analysis of mass spectra from ROSINA–DFMS, COSAC and Ptolemy
K Altwegg, H Balsiger, JJ Berthelier, A Bieler, U Calmonte, SA Fuselier, ...
Monthly Notices of the Royal Astronomical Society 469 (Suppl_2), S130-S141, 2017
1902017
Plasmaspheric density structures and dynamics: Properties observed by the CLUSTER and IMAGE missions
F Darrouzet, DL Gallagher, N André, DL Carpenter, I Dandouras, ...
Space science reviews 145, 55-106, 2009
1642009
Elemental and molecular abundances in comet 67P/Churyumov-Gerasimenko
M Rubin, K Altwegg, H Balsiger, JJ Berthelier, MR Combi, J De Keyser, ...
Monthly Notices of the Royal Astronomical Society 489 (1), 594-607, 2019
1572019
Influence of spacecraft outgassing on the exploration of tenuous atmospheres with in situ mass spectrometry
B Schläppi, K Altwegg, H Balsiger, M Hässig, A Jäckel, P Wurz, B Fiethe, ...
Journal of Geophysical Research: Space Physics 115 (A12), 2010
1412010
Vlasov theory of the equilibrium structure of tangential discontinuities in space plasmas
M Roth, J De Keyser, MM Kuznetsova
Space Science Reviews 76 (3), 251-317, 1996
1241996
Comparison of 3D kinetic and hydrodynamic models to ROSINA-COPS measurements of the neutral coma of 67P/Churyumov-Gerasimenko
A Bieler, K Altwegg, H Balsiger, JJ Berthelier, U Calmonte, M Combi, ...
Astronomy & Astrophysics 583, A7, 2015
1212015
Evidence of ammonium salts in comet 67P as explanation for the nitrogen depletion in cometary comae
K Altwegg, H Balsiger, N Hänni, M Rubin, M Schuhmann, I Schroeder, ...
Nature Astronomy 4 (5), 533-540, 2020
1172020
Three-dimensional direct simulation Monte-Carlo modeling of the coma of comet 67P/Churyumov-Gerasimenko observed by the VIRTIS and ROSINA instruments on board Rosetta
N Fougere, K Altwegg, JJ Berthelier, A Bieler, D Bockelee-Morvan, ...
Astronomy & Astrophysics 588, A134, 2016
1152016
Direct simulation Monte Carlo modelling of the major species in the coma of comet 67P/Churyumov-Gerasimenko
N Fougere, K Altwegg, JJ Berthelier, A Bieler, D Bockelée-Morvan, ...
Monthly Notices of the Royal Astronomical Society 462 (Suppl_1), S156-S169, 2016
1112016
Statistical analysis of plasmaspheric plumes with Cluster/WHISPER observations
F Darrouzet, J De Keyser, PME Décréau, F El Lemdani-Mazouz, ...
Annales Geophysicae 26 (8), 2403-2417, 2008
1112008
Detection of argon in the coma of comet 67P/Churyumov-Gerasimenko
H Balsiger, K Altwegg, A Bar-Nun, JJ Berthelier, A Bieler, P Bochsler, ...
Science advances 1 (8), e1500377, 2015
1052015
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