Search Results - "De Keyser, Johan"

Elemental and molecular abundances in comet 67P/Churyumov-Gerasimenko by Rubin, Martin, Altwegg, Kathrin, Balsiger, Hans, Berthelier, Jean-Jacques, Combi, Michael R, De Keyser, Johan, Drozdovskaya, Maria, Fiethe, Björn, Fuselier, Stephen A, Gasc, Sébastien, Gombosi, Tamas I, Hänni, Nora, Hansen, Kenneth C, Mall, Urs, Rème, Henri, Schroeder, Isaac R H G, Schuhmann, Markus, Sémon, Thierry, Waite, Jack H, Wampfler, Susanne F, Wurz, Peter

“…ABSTRACT Comets are considered to be some of the most pristine and unprocessed Solar system objects accessible to in situ exploration. Investigating their…”
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Prestellar grain-surface origins of deuterated methanol in comet 67P/Churyumov–Gerasimenko by Drozdovskaya, Maria N, Schroeder I, Isaac R H G, Rubin, Martin, Altwegg, Kathrin, van Dishoeck, Ewine F, Kulterer, Beatrice M, De Keyser, Johan, Fuselier, Stephen A, Combi, Michael

“…ABSTRACT Deuterated methanol is one of the most robust windows astrochemists have on the individual chemical reactions forming deuterium-bearing molecules and…”
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Evidence of ammonium salts in comet 67P as explanation for the nitrogen depletion in cometary comae by Altwegg, Kathrin, Balsiger, Hans, Hänni, Nora, Rubin, Martin, Schuhmann, Markus, Schroeder, Isaac, Sémon, Thierry, Wampfler, Susanne, Berthelier, Jean-Jacques, Briois, Christelle, Combi, Mike, Gombosi, Tamas I., Cottin, Hervé, De Keyser, Johan, Dhooghe, Frederik, Fiethe, Björn, Fuselier, Steven A.

“…Cometary comae are generally depleted in nitrogen. The main carriers for volatile nitrogen in comets are NH 3 and HCN. It is known that ammonia readily…”
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A Case for Electron-Astrophysics by Verscharen, Daniel, Wicks, Robert T., Alexandrova, Olga, Bruno, Roberto, Burgess, David, Chen, Christopher H. K., D’Amicis, Raffaella, De Keyser, Johan, de Wit, Thierry Dudok, Franci, Luca, He, Jiansen, Henri, Pierre, Kasahara, Satoshi, Khotyaintsev, Yuri, Klein, Kristopher G., Lavraud, Benoit, Maruca, Bennett A., Maksimovic, Milan, Plaschke, Ferdinand, Poedts, Stefaan, Reynolds, Christopher S., Roberts, Owen, Sahraoui, Fouad, Saito, Shinji, Salem, Chadi S., Saur, Joachim, Servidio, Sergio, Stawarz, Julia E., Štverák, Štěpán, Told, Daniel

“…The smallest characteristic scales, at which electron dynamics determines the plasma behaviour, are the next frontier in space and astrophysical plasma…”
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The detection of ultra-relativistic electrons in low Earth orbit by Katsiyannis, Athanassios C., Dominique, Marie, Pierrard, Viviane, Rosson, Graciela Lopez, Keyser, Johan De, Berghmans, David, Kruglanski, Michel, Dammasch, Ingolf E., Donder, Erwin De

“…Aims. To better understand the radiation environment in low Earth orbit (LEO), the analysis of in-situ observations of a variety of particles, at different…”
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Change of outgassing pattern of 67P/Churyumov–Gerasimenko during the March 2016 equinox as seen by ROSINA by Gasc, Sébastien, Altwegg, Kathrin, Balsiger, Hans, Berthelier, Jean-Jacques, Bieler, André, Calmonte, Ursina, Fiethe, Björn, Fuselier, Stephen, Galli, André, Gombosi, Tamas, Hoang, Margaux, De Keyser, Johan, Korth, Axel, Le Roy, Léna, Mall, Urs, Rème, Henri, Rubin, Martin, Sémon, Thierry, Tzou, Chia-Yu, Waite, Jack Hunter, Wurz, Peter

“…Abstract As the spin axis of comet 67P/Churyumov–Gerasimenko (67P) is not normal to the orbital plane, 67P has strong seasonal changes in the illumination…”
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Chlorine-bearing species and the 37Cl/35Cl isotope ratio in the coma of comet 67P/Churyumov–Gerasimenko by Dhooghe, Frederik, De Keyser, Johan, Hänni, Nora, Altwegg, Kathrin, Cessateur, Gaël, Jehin, Emmanuel, Maggiolo, Romain, Rubin, Martin, Wurz, Peter

“…ABSTRACT A full-mission analysis has been conducted of Cl-bearing species in the coma of comet 67P/Churyumov–Gerasimenko as detected by the Double Focusing…”
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Evidence for Abiotic Dimethyl Sulfide in Cometary Matter by Hänni, Nora, Altwegg, Kathrin, Combi, Michael, Fuselier, Stephen A., De Keyser, Johan, Ligterink, Niels F. W., Rubin, Martin, Wampfler, Susanne F.

“…Abstract Technological progress related to astronomical observatories such as the recently launched James Webb Space Telescope (JWST) allows searching for…”
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Volatiles in the H2O and CO2 ices of comet 67P/Churyumov–Gerasimenko by Rubin, Martin, Altwegg, Kathrin, Berthelier, Jean-Jacques, Combi, Michael R, De Keyser, Johan, Fuselier, Stephen A, Gombosi, Tamas I, Gudipati, Murthy S, Hänni, Nora, Kipfer, Kristina A, Ligterink, Niels F W, Müller, Daniel R, Shou, Yinsi, Wampfler, Susanne F

“…ABSTRACT European Space Agency’s Rosetta spacecraft at comet 67P/Churyumov–Gerasimenko (67P) was the first mission that accompanied a comet over a substantial…”
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Deciphering cometary outbursts: linking gas composition changes to trigger mechanisms by Müller, Daniel R, Altwegg, Kathrin, Berthelier, Jean-Jacques, Combi, Michael R, De Keyser, Johan, Fuselier, Stephen A, Garnier, Philippe, Hänni, Nora, Mall, Urs, Rubin, Martin, Wampfler, Susanne F, Wurz, Peter

“…ABSTRACT Dust and gas outbursts are recurrent cometary phenomena, playing a crucial role in shaping the coma. Proposed outburst trigger mechanisms include…”
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Prebiotic chemicals-amino acid and phosphorus-in the coma of comet 67P/Churyumov-Gerasimenko by Altwegg, Kathrin, Balsiger, Hans, Bar-Nun, Akiva, Berthelier, Jean-Jacques, Bieler, Andre, Bochsler, Peter, Briois, Christelle, Calmonte, Ursina, Combi, Michael R, Cottin, Hervé, De Keyser, Johan, Dhooghe, Frederik, Fiethe, Bjorn, Fuselier, Stephen A, Gasc, Sébastien, Gombosi, Tamas I, Hansen, Kenneth C, Haessig, Myrtha, Jäckel, Annette, Kopp, Ernest, Korth, Axel, Le Roy, Lena, Mall, Urs, Marty, Bernard, Mousis, Olivier, Owen, Tobias, Rème, Henri, Rubin, Martin, Sémon, Thierry, Tzou, Chia-Yu, Hunter Waite, James, Wurz, Peter

“…The importance of comets for the origin of life on Earth has been advocated for many decades. Amino acids are key ingredients in chemistry, leading to life as…”
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A comparison between the two lobes of comet 67P/Churyumov–Gerasimenko based on D/H ratios in H2O measured with the Rosetta/ROSINA DFMS by Schroeder, Isaac R H G, Altwegg, Kathrin, Balsiger, Hans, Berthelier, Jean-Jacques, Combi, Michael R, De Keyser, Johan, Fiethe, Björn, Fuselier, Stephen A, Gombosi, Tamas I, Hansen, Kenneth C, Rubin, Martin, Shou, Yinsi, Tenishev, Valeriy M, Sémon, Thierry, Wampfler, Susanne F, Wurz, Peter

“…ABSTRACT The nucleus of the Jupiter-family comet 67P/Churyumov–Gerasimenko was discovered to be bi-lobate in shape when the European Space Agency spacecraft…”
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Particle energization in space plasmas: towards a multi-point, multi-scale plasma observatory by Retinò, Alessandro, Khotyaintsev, Yuri, Le Contel, Olivier, Marcucci, Maria Federica, Plaschke, Ferdinand, Vaivads, Andris, Angelopoulos, Vassilis, Blasi, Pasquale, Burch, Jim, De Keyser, Johan, Dunlop, Malcolm, Dai, Lei, Eastwood, Jonathan, Fu, Huishan, Haaland, Stein, Hoshino, Masahiro, Johlander, Andreas, Kepko, Larry, Kucharek, Harald, Lapenta, Gianni, Lavraud, Benoit, Malandraki, Olga, Matthaeus, William, McWilliams, Kathryn, Petrukovich, Anatoli, Pinçon, Jean-Louis, Saito, Yoshifumi, Sorriso-Valvo, Luca, Vainio, Rami, Wimmer-Schweingruber, Robert

“…This White Paper outlines the importance of addressing the fundamental science theme “ How are charged particles energized in space plasmas ” through a future…”
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Evidence for distributed gas sources of hydrogen halides in the coma of comet 67P/Churyumov–Gerasimenko by De Keyser, Johan, Dhooghe, Frederik, Altwegg, Kathrin, Balsiger, Hans, Berthelier, Jean-Jacques, Briois, Christelle, Calmonte, Ursina, Cessateur, Gaël, Combi, Michael R., Equeter, Eddy, Fiethe, Björn, Fuselier, Stephen, Gasc, Sébastien, Gibbons, Andrew, Gombosi, Tamas, Gunell, Herbert, Hässig, Myrtha, Le Roy, Léna, Maggiolo, Romain, Mall, Urs, Marty, Bernard, Neefs, Eddy, Rème, Henri, Rubin, Martin, Sémon, Thierry, Tzou, Chia-Yu, Wurz, Peter

“…Abstract Rosetta has detected the presence of the hydrogen halides HF, HCl, and HBr in the coma of comet 67P/Churyumov–Gerasimenko. These species are known to…”
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Plasmaspheric Density Structures and Dynamics: Properties Observed by the CLUSTER and IMAGE Missions by Darrouzet, Fabien, Gallagher, Dennis L., André, Nicolas, Carpenter, Donald L., Dandouras, Iannis, Décréau, Pierrette M. E., De Keyser, Johan, Denton, Richard E., Foster, John C., Goldstein, Jerry, Moldwin, Mark B., Reinisch, Bodo W., Sandel, Bill R., Tu, Jiannan

“…Plasmaspheric density structures have been studied since the discovery of the plasmasphere in the late 1950s. But the advent of the Cluster and Image missions…”
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IMPALAS: Investigation of MagnetoPause Activity using Longitudinally-Aligned Satellites—a mission concept proposed for the ESA M3 2020/2022 launch by Owen, Christopher J., Amm, Olaf, Bruno, Roberto, Keyser, Johan De, Dunlop, Malcolm W., Eastwood, Jonathan P., Fazakerley, Andrew N., Fontaine, Dominique, Forsyth, Colin, Hasegawa, Hiroshi, Hellinger, Petr, Hercik, David, Jacquey, Christian, Milan, Steven, Raeder, Joachim, Sibeck, David G., Stverak, Stepan, Travnicek, Pavel, Walsh, Andrew P., Wild, James A.

“…The dayside magnetopause is the primary site of energy transfer from the solar wind into the magnetosphere, and modulates the activity observed within the…”
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Detection of argon in the coma of comet 67P/Churyumov-Gerasimenko by Balsiger, Hans, Altwegg, Kathrin, Bar-Nun, Akiva, Berthelier, Jean-Jacques, Bieler, Andre, Bochsler, Peter, Briois, Christelle, Calmonte, Ursina, Combi, Michael, De Keyser, Johan, Eberhardt, Peter, Fiethe, Björn, Fuselier, Stephen A, Gasc, Sébastien, Gombosi, Tamas I, Hansen, Kenneth C, Hässig, Myrtha, Jäckel, Annette, Kopp, Ernest, Korth, Axel, Le Roy, Lena, Mall, Urs, Marty, Bernard, Mousis, Olivier, Owen, Tobias, Rème, Henri, Rubin, Martin, Sémon, Thierry, Tzou, Chia-Yu, Waite, J Hunter, Wurz, Peter

“…Comets have been considered to be representative of icy planetesimals that may have contributed a significant fraction of the volatile inventory of the…”
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Space plasma physics science opportunities for the lunar orbital platform - Gateway by Dandouras, Iannis, Taylor, Matt G. G. T., De Keyser, Johan, Futaana, Yoshifumi, Bamford, Ruth A., Branduardi-Raymont, Graziella, Chaufray, Jean-Yves, Constantinescu, Dragos, De Angelis, Elisabetta, Devoto, Pierre, Eastwood, Jonathan, Echim, Marius, Garnier, Philippe, Grison, Benjamin, Hercik, David, Lammer, Helmut, Laurens, André, Leblanc, François, Milillo, Anna, Nakamura, Rumi, Přech, Lubomír, Roussos, Elias, Štverák, Štěpán, Forest, Julien, Trouche, Arnaud, Hess, Sébastien L. G., Mateo-Vélez, Jean-Charles, Carpenter, James, Winter, Josef

“…The Lunar Orbital Platform - Gateway (LOP - Gateway, or simply Gateway) is a crewed platform that will be assembled and operated in the vicinity of the Moon by…”
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The Virtual Space Weather Modelling Centre by Poedts, Stefaan, Kochanov, Andrey, Lani, Andrea, Scolini, Camilla, Verbeke, Christine, Hosteaux, Skralan, Chané, Emmanuel, Deconinck, Herman, Mihalache, Nicolae, Diet, Fabian, Heynderickx, Daniel, De Keyser, Johan, De Donder, Erwin, Crosby, Norma B., Echim, Marius, Rodriguez, Luciano, Vansintjan, Robbe, Verstringe, Freek, Mampaey, Benjamin, Horne, Richard, Glauert, Sarah, Jiggens, Piers, Keil, Ralf, Glover, Alexi, Deprez, Grégoire, Luntama, Juha-Pekka

“…Aims . Our goal is to develop and provide an open end-to-end (Sun to Earth) space weather modeling system, enabling to combine (“couple”) various space weather…”
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Plasma-neutral gas interactions in various space environments: Assessment beyond simplified approximations as a Voyage 2050 theme by Yamauchi, Masatoshi, De Keyser, Johan, Parks, George, Oyama, Shin-ichiro, Wurz, Peter, Abe, Takumi, Beth, Arnaud, Daglis, Ioannis A., Dandouras, Iannis, Dunlop, Malcolm, Henri, Pierre, Ivchenko, Nickolay, Kallio, Esa, Kucharek, Harald, Liu, Yong C.-M., Mann, Ingrid, Marghitu, Octav, Nicolaou, Georgios, Rong, Zhaojin, Sakanoi, Takeshi, Saur, Joachim, Shimoyama, Manabu, Taguchi, Satoshi, Tian, Feng, Tsuda, Takuo, Tsurutani, Bruce, Turner, Drew, Ulich, Thomas, Yau, Andrew, Yoshikawa, Ichiro

“…In the White Paper, submitted in response to the European Space Agency (ESA) Voyage 2050 Call, we present the importance of advancing our knowledge of…”
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