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438 results on '"Berthelier, J. J"'

1. BepiColombo observations of cold oxygen and carbon ions in the flank of the induced magnetosphere of Venus

Author

Hadid, L. Z., Delcourt, D., Saito, Y., Fränz, M., Yokota, S., Fiethe, B., Verdeil, C., Katra, B., Leblanc, F., Fischer, H., Persson, M., Aizawa, S., André, N., Harada, Y., Fedorov, A., Fontaine, D., Krupp, N., Michalik, H., Berthelier, J-J., Krüger, H., Murakami, G., Matsuda, S., Heyner, D., Auster, H.-U., Richter, I., Mieth, J. Z. D., Schmid, D., and Fischer, D.

Published
2024
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3. ROSINA ion zoo at Comet 67P

Author

Beth, A., Altwegg, K., Balsiger, H., Berthelier, J. -J., Combi, M. R., De Keyser, J., Fiethe, B., Fuselier, S. A., Galand, M., Gombosi, T. I., Rubin, M., and Sémon, T.

Subjects
Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

The Rosetta spacecraft escorted Comet 67P/Churyumov-Gerasimenko for 2 years along its journey through the Solar System between 3.8 and 1.24~au. Thanks to the high resolution mass spectrometer on board Rosetta, the detailed ion composition within a coma has been accurately assessed in situ for the very first time. Previous cometary missions, such as $\text{Giotto}$, did not have the instrumental capabilities to identify the exact nature of the plasma in a coma because the mass resolution of the spectrometers onboard was too low to separate ion species with similar masses. In contrast, the Double Focusing Mass Spectrometer (DFMS), part of the Rosetta Orbiter Spectrometer for Ion and Neutral Analysis on board Rosetta (ROSINA), with its high mass resolution mode, outperformed all of them, revealing the diversity of cometary ions. We calibrated and analysed the set of spectra acquired by DFMS in ion mode from October 2014 to April 2016. In particular, we focused on the range from 13-39 u$\cdot$q$^{-1}$. The high mass resolution of DFMS allows for accurate identifications of ions with quasi-similar masses, separating $^{13}$C$^+$ from CH$^+$, for instance. We confirm the presence in situ of predicted cations at comets, such as CH$_m^+$ ($m=1-4$), H$_n$O$^+$ ($n=1-3$), O$^+$, Na$^+$, and several ionised and protonated molecules. Prior to Rosetta, only a fraction of them had been confirmed from Earth-based observations. In addition, we report for the first time the unambiguous presence of a molecular dication in the gas envelope of a Solar System body, namely CO$_2^{++}$., Comment: Accepted for publication in A&A

Published
2020
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4. Evidence of ammonium salts in comet 67P as explanation for the nitrogen depletion in cometary comae

Author

Altwegg, K., Balsiger, H., Berthelier, J. -J., Briois, C., Combi, M., Cottin, H., De Keyser, J., Dhooghe, F., Fiethe, B., Fuselier, S. A., Gombosi, T. I., Hänni, N., Rubin, M., Schuhmann, M., Schroeder, I., Sémon, T., and Wampfler, S.

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

Cometary comae are generally depleted in nitrogen. The main carriers for volatile nitrogen in comets are NH3 and HCN. It is known that ammonia readily combines with many acids like e.g. HCN, HNCO, HCOOH, etc. encountered in the interstellar medium as well as in cometary ice to form ammonium salts (NH4+X-) at low temperatures. Ammonium salts, which can play a significant role in prebiotic chemistry, are hard to detect in space as they are unstable in the gas phase and their infrared signature is often hidden by thermal radiation or by e.g. OH in minerals. Here we report the presence of all possible sublimation products of five different ammonium salts at comet 67P/Churyumov-Gerasimenko measured by the ROSINA instrument on Rosetta. The relatively high sublimation temperatures of the salts leads to an apparent lack of volatile nitrogen in the coma. This then also explains the observed trend of higher NH3/H2O ratios with decreasing perihelion distances in comets.

Published
2019

5. Evidence for depletion of heavy silicon isotopes at comet 67P/Churyumov-Gerasimenko

Author

Rubin, M., Altwegg, K., Balsiger, H., Berthelier, J. -J., Bieler, A., Calmonte, U., Combi, M., De Keyser, J., Engrand, C., Fiethe, B., Fuselier, S. A., Gasc, S., Gombosi, T. I., Hansen, K. C., Hässig, M., Roy, L. Le, Mezger, K., Tzou, C. -Y., Wampfler, S. F., and Wurz, P.

Subjects
Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Solar and Stellar Astrophysics
Abstract

Context. The Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA) was designed to measure the composition of the gas in the coma of comet 67P/Churyumov-Gerasimenko, the target of the European Space Agency's Rosetta mission. In addition to the volatiles, ROSINA measured refractories sputtered off the comet by the interaction of solar wind protons with the surface of the comet. Aims. The origin of different solar system materials is still heavily debated. Isotopic ratios can be used to distinguish between different reservoirs and investigate processes occurring during the formation of the solar system. Methods. ROSINA consisted of two mass spectrometers and a pressure sensor. In the ROSINA Double Focusing Mass Spectrometer (DFMS), the neutral gas of cometary origin was ionized and then deflected in an electric and a magnetic field that separated the ions based on their mass-to-charge ratio. The DFMS had a high mass resolution, dynamic range, and sensitivity that allowed detection of rare species and the known major volatiles. Results. We measured the relative abundance of all three stable silicon isotopes with the ROSINA instrument on board the Rosetta spacecraft. Furthermore, we measured $^{13}$C/$^{12}$C in C$_2$H$_4$, C$_2$H$_5$, and CO. The DFMS in situ measurements indicate that the average silicon isotopic composition shows depletion in the heavy isotopes $^{29}$Si and $^{30}$Si with respect to $^{28}$Si and solar abundances, while $^{13}$C to $^{12}$C is analytically indistinguishable from bulk planetary and meteorite compositions. Although the origin of the deficiency of the heavy silicon isotopes cannot be explained unambiguously, we discuss mechanisms that could have contributed to the measured depletion of the isotopes $^{29}$Si and $^{30}$Si., Comment: Accepted for publication in Astronomy & Astrophysics

Published
2017
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6. Impact of radiogenic heating on the formation conditions of comet 67P/Churyumov-Gerasimenko

Author

Mousis, O., Drouard, A., Vernazza, P., Lunine, J. I., Monnereau, M., Maggiolo, R., Altwegg, K., Balsiger, H., Berthelier, J. -J., Cessateur, G., De Keyser, J., Fuselier, S. A., Gasc, S., Korth, A., Deun, T. Le, Mall, U., Marty, B., Rème, H., Rubin, M., Tzou, C. -Y., Waite, J. H., and Wurz, P.

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

Because of the high fraction of refractory material present in comets, the heat produced by the radiogenic decay of elements such as aluminium and iron can be high enough to induce the loss of ultravolatile species such as nitrogen, argon or carbon monoxide during their accretion phase in the protosolar nebula. Here, we investigate how heat generated by the radioactive decay of 26Al and 60Fe influences the formation of comet 67P/Churyumov-Gerasimenko, as a function of its accretion time and size of parent body. We use an existing thermal evolution model that includes various phase transitions, heat transfer in the ice-dust matrix, and gas diffusion throughout the porous material, based on thermodynamic parameters derived from Rosetta observations. Two possibilities are considered: either, to account for its bilobate shape, 67P/Churyumov-Gerasimenko was assembled from two primordial ~2 kilometer-sized planetesimals, or it resulted from the disruption of a larger parent body with a size corresponding to that of comet Hale-Bopp (~70 km). To fully preserve its volatile content, we find that either 67P/Churyumov-Gerasimenko's formation was delayed between ~2.2 and 7.7 Myr after that of Ca-Al-rich Inclusions in the protosolar nebula or the comet's accretion phase took place over the entire time interval, depending on the primordial size of its parent body and the composition of the icy material considered. Our calculations suggest that the formation of 67P/Churyumov-Gerasimenko is consistent with both its accretion from primordial building blocks formed in the nebula or from debris issued from the disruption of a Hale-Bopp-like body., Comment: Accepted for publication in The Astrophysical Journal Letters

Published
2017
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7. Inner southern magnetosphere observation of Mercury via SERENA ion sensors in BepiColombo mission

Author

Orsini, S., Milillo, A., Lichtenegger, H., Varsani, A., Barabash, S., Livi, S., De Angelis, E., Alberti, T., Laky, G., Nilsson, H., Phillips, M., Aronica, A., Kallio, E., Wurz, P., Olivieri, A., Plainaki, C., Slavin, J. A., Dandouras, I., Raines, J. M., Benkhoff, J., Zender, J., Berthelier, J.-J., Dosa, M., Ho, G. C., Killen, R. M., McKenna-Lawlor, S., Torkar, K., Vaisberg, O., Allegrini, F., Daglis, I. A., Dong, C., Escoubet, C. P., Fatemi, S., Fränz, M., Ivanovski, S., Krupp, N., Lammer, H., Leblanc, François, Mangano, V., Mura, A., Rispoli, R., Sarantos, M., Smith, H. T., Wieser, M., Camozzi, F., Di Lellis, A. M., Fremuth, G., Giner, F., Gurnee, R., Hayes, J., Jeszenszky, H., Trantham, B., Balaz, J., Baumjohann, W., Cantatore, M., Delcourt, D., Delva, M., Desai, M., Fischer, H., Galli, A., Grande, M., Holmström, M., Horvath, I., Hsieh, K. C., Jarvinen, R., Johnson, R. E., Kazakov, A., Kecskemety, K., Krüger, H., Kürbisch, C., Leblanc, Frederic, Leichtfried, M., Mangraviti, E., Massetti, S., Moissenko, D., Moroni, M., Noschese, R., Nuccilli, F., Paschalidis, N., Ryno, J., Seki, K., Shestakov, A., Shuvalov, S., Sordini, R., Stenbeck, F., Svensson, J., Szalai, S., Szego, K., Toublanc, D., Vertolli, N., Wallner, R., and Vorburger, A.

Published
2022
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13. Empirical Model of the Lowest Cutoff Altitude of Global Hiss Near Magnetic Equator.

Author

Li, L. Y., Yang, L., Cheng, K. X., Cao, J. B., Yang, J. Y., and Berthelier, J. J.

Subjects
ALTITUDES, RADIATION belts, TERRESTRIAL radiation, HYDROGEN ions
Abstract

Van Allen Probe observations indicate that whistler‐mode hiss waves below 1 kHz are absorbed at low altitudes near magnetic equator. The lowest cutoff frequency of equatorial hiss is close to the gyrofrequency of hydrogen ions. The lowest cutoff altitude of global hiss is extracted when its occurrence rate is equal to 0.005 on the plane of altitude (L in RE) and magnetic local time (MLT). By fitting the lowest cutoff altitude of global hiss, we constructed the empirical model of the lowest cutoff altitude of equatorial hiss under geomagnetically quiet (AE < 200 nT) and active (AE ≥ 200 nT) conditions. The enhanced substorm activities reduce the lowest cutoff altitude of hiss waves on the dawnside (MLT ∼ 1–5 hr), whereas the lowest cutoff altitude of the dayside hiss is nearly fixed at ∼1.1 RE (MLT ∼ 6–20 hr). From the dayside to the nightside (MLT ∼ 0–6 hr and 20–24 hr), the lowest cutoff altitude of equatorial hiss raises gradually from 1.1 RE to 1.4 RE. Plain Language Summary: Plasmaspheric hiss can cause the scattering loss of Earth's radiation belt electrons via wave‐particle resonant interactions and creates a slot region relatively safe for satellites. Thus, their spatial distribution is a key parameter controlling the dynamics of radiation belts. Although the outer boundary of hiss waves can be estimated with the empirical plasmapause location, there is no any empirical model to quantificationally describe their inner boundary. Here, based on the Van Allen Probe observations, we constructed empirical models to estimate the lowest cutoff altitude of global hiss under different geomagnetic conditions. The new empirical models provide an inner boundary for simulating the resonant interactions between hiss waves and high‐energy electrons. Key Points: The lowest cutoff altitude of global hiss is quantificationally examined with Van Allen Probes observations near the magnetic equatorThe lowest cutoff altitude of equatorial hiss is nearly fixed at L ∼ 1.1 on the dayside, but changes between L ∼ 1.1–1.4 on the nightsideNew empirical models are constructed to estimate the lowest cutoff altitude of global hiss under different geomagnetic conditions [ABSTRACT FROM AUTHOR]

Published
2024
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14. The DREAMS experiment flown on the ExoMars 2016 mission for the study of Martian environment during the dust storm season

Author

Harri, A.-M., Montmessin, F., Wilson, C., Rodríguez, I. Arruego, Abbaki, S., Apestigue, V., Bellucci, G., Berthelier, J.-J., Calcutt, S.B., Forget, F., Genzer, M., Gilbert, P., Haukka, H., Jiménez, J.J., Jiménez, S., Josset, J.-L., Karatekin, O., Landis, G., Lorenz, R., Martinez, J., Möhlmann, D., Moirin, D., Palomba, E., Patel, M., Pommereau, J.-P., Popa, C.I., Rafkin, S., Rannou, P., Renno, N.O., Schmidt, W., Simoes, F., Spiga, A., Valero, F., Vázquez, L., Vivat, F., Witasse, O., Bettanini, C., Esposito, F., Debei, S., Molfese, C., Colombatti, G., Aboudan, A., Brucato, J.R., Cortecchia, F., Di Achille, G., Guizzo, G.P., Friso, E., Ferri, F., Marty, L., Mennella, V., Molinaro, R., Schipani, P., Silvestro, S., Mugnuolo, R., Pirrotta, S., and Marchetti, E.

Published
2018
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15. Correction to: SERENA: Particle Instrument Suite for Determining the Sun-Mercury Interaction from BepiColombo

Author

Orsini, S., Livi, S. A., Lichtenegger, H., Barabash, S., Milillo, A., De Angelis, E., Phillips, M., Laky, G., Wieser, M., Olivieri, A., Plainaki, C., Ho, G., Killen, R. M., Slavin, J. A., Wurz, P., Berthelier, J.-J., Dandouras, I., Kallio, E., McKenna-Lawlor, S., Szalai, S., Torkar, K., Vaisberg, O., Allegrini, F., Daglis, I. A., Dong, C., Escoubet, C. P., Fatemi, S., Fränz, M., Ivanovski, S., Krupp, N., Lammer, H., Leblanc, François, Mangano, V., Mura, A., Nilsson, H., Raines, J. M., Rispoli, R., Sarantos, M., Smith, H. T., Szego, K., Aronica, A., Camozzi, F., Di Lellis, A. M., Fremuth, G., Giner, F., Gurnee, R., Hayes, J., Jeszenszky, H., Tominetti, F., Trantham, B., Balaz, J., Baumjohann, W., Brienza, D., Bührke, U., Bush, M. D., Cantatore, M., Cibella, S., Colasanti, L., Cremonese, G., Cremonesi, L., D’Alessandro, M., Delcourt, D., Delva, M., Desai, M., Fama, M., Ferris, M., Fischer, H., Gaggero, A., Gamborino, D., Garnier, P., Gibson, W. C., Goldstein, R., Grande, M., Grishin, V., Haggerty, D., Holmström, M., Horvath, I., Hsieh, K.-C., Jacques, A., Johnson, R. E., Kazakov, A., Kecskemety, K., Krüger, H., Kürbisch, C., Lazzarotto, F., Leblanc, Frederic, Leichtfried, M., Leoni, R., Loose, A., Maschietti, D., Massetti, S., Mattioli, F., Miller, G., Moissenko, D., Morbidini, A., Noschese, R., Nuccilli, F., Nunez, C., Paschalidis, N., Persyn, S., Piazza, D., Oja, M., Ryno, J., Schmidt, W., Scheer, J. A., Shestakov, A., Shuvalov, S., Seki, K., Selci, S., Smith, K., Sordini, R., Svensson, J., Szalai, L., Toublanc, D., Urdiales, C., Varsani, A., Vertolli, N., Wallner, R., Wahlstroem, P., Wilson, P., and Zampieri, S.

Published
2021
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16. SERENA: Particle Instrument Suite for Determining the Sun-Mercury Interaction from BepiColombo

Author

Orsini, S., Livi, S. A., Lichtenegger, H., Barabash, S., Milillo, A., De Angelis, E., Phillips, M., Laky, G., Wieser, M., Olivieri, A., Plainaki, C., Ho, G., Killen, R. M., Slavin, J. A., Wurz, P., Berthelier, J.-J., Dandouras, I., Kallio, E., McKenna-Lawlor, S., Szalai, S., Torkar, K., Vaisberg, O., Allegrini, F., Daglis, I. A., Dong, C., Escoubet, C. P., Fatemi, S., Fränz, M., Ivanovski, S., Krupp, N., Lammer, H., Leblanc, François, Mangano, V., Mura, A., Nilsson, H., Raines, J. M., Rispoli, R., Sarantos, M., Smith, H. T., Szego, K., Aronica, A., Camozzi, F., Di Lellis, A. M., Fremuth, G., Giner, F., Gurnee, R., Hayes, J., Jeszenszky, H., Tominetti, F., Trantham, B., Balaz, J., Baumjohann, W., Brienza, D., Bührke, U., Bush, M. D., Cantatore, M., Cibella, S., Colasanti, L., Cremonese, G., Cremonesi, L., D’Alessandro, M., Delcourt, D., Delva, M., Desai, M., Fama, M., Ferris, M., Fischer, H., Gaggero, A., Gamborino, D., Garnier, P., Gibson, W. C., Goldstein, R., Grande, M., Grishin, V., Haggerty, D., Holmström, M., Horvath, I., Hsieh, K.-C., Jacques, A., Johnson, R. E., Kazakov, A., Kecskemety, K., Krüger, H., Kürbisch, C., Lazzarotto, F., Leblanc, Frederic, Leichtfried, M., Leoni, R., Loose, A., Maschietti, D., Massetti, S., Mattioli, F., Miller, G., Moissenko, D., Morbidini, A., Noschese, R., Nuccilli, F., Nunez, C., Paschalidis, N., Persyn, S., Piazza, D., Oja, M., Ryno, J., Schmidt, W., Scheer, J. A., Shestakov, A., Shuvalov, S., Seki, K., Selci, S., Smith, K., Sordini, R., Svensson, J., Szalai, L., Toublanc, D., Urdiales, C., Varsani, A., Vertolli, N., Wallner, R., Wahlstroem, P., Wilson, P., and Zampieri, S.

Published
2021
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17. D₂O and HDS in the coma of 67P/Churyumov—Gerasimenko

Author

Altwegg, K., Balsiger, H., Berthelier, J. J., Bieler, A., Calmonte, U., De Keyser, J., Fiethe, B., Fuselier, S. A., Gasc, S., Gombosi, T. I., Owen, T., Le Roy, L., Rubin, M., Sémon, T., and Tzou, C.-Y.

Published
2017

18. Xenon isotopes in 67P/Churyumov-Gerasimenko show that comets contributed to Earth's atmosphere

Author

Marty, B., Altwegg, K., Balsiger, H., Bar-Nun, A., Bekaert, D. V., Berthelier, J.-J., Bieler, A., Briois, C., Calmonte, U., Combi, M., De Keyser, J., Fiethe, B., Fuselier, S. A., Gasc, S., Gombosi, T. I., Hansen, K. C., Hässig, M., Jäckel, A., Kopp, E., Korth, A., Le Roy, L., Mall, U., Mousis, O., Owen, T., Rème, H., Rubin, M., Sémon, T., Tzou, C.-Y., Waite, J. H., and Wurz, P.

Published
2017

20. Molecular nitrogen in comet 67P/Churyumov-Gerasimenko indicates a low formation temperature

Author

Rubin, M., Altwegg, K., Balsiger, H., Bar-Nun, A., Berthelier, J.-J., Bieler, A., Bochsler, P., Briois, C., Calmonte, U., Combi, M., De Keyser, J., Dhooghe, F., Eberhardt, P., Fiethe, B., Fuselier, S. A., Gasc, S., Gombosi, T. I., Hansen, K. C., Hässig, M., Jäckel, A., Kopp, E., Korth, A., Le Roy, L., Mall, U., Marty, B., Mousis, O., Owen, T., Réme, H., Sémon, T., Tzou, C.-Y., Waite, J. H., and Wurz, P.

Published
2015

22. Time variability and heterogeneity in the coma of 67P/Churyumov-Gerasimenko

Author

Hässig, M., Altwegg, K., Balsiger, H., Bar-Nun, A., Berthelier, J. J., Bieler, A., Bochsler, P., Briois, C., Calmonte, U., Combi, M., De Keyser, J., Eberhardt, P., Fiethe, B., Fuselier, S. A., Galand, M., Gasc, S., Gombosi, T. I., Hansen, K. C., Jäckel, A., Keller, H. U., Kopp, E., Korth, A., Kührt, E., Le Roy, L., Mall, U., Marty, B., Mousis, O., Neefs, E., Owen, T., Rème, H., Rubin, M., Sémon, T., Tornow, C., Tzou, C.-Y., Waite, J. H., and Wurz, P.

Published
2015

23. 67P/Churyumov-Gerasimenko, a Jupiter family comet with a high D/H ratio

Author

Altwegg, K., Balsiger, H., Bar-Nun, A., Berthelier, J. J., Bieler, A., Bochsler, P., Briois, C., Calmonte, U., Combi, M., De Keyser, J., Eberhardt, P., Fiethe, B., Fuselier, S., Gasc, S., Gombosi, T. I., Hansen, K.C., Hässig, M., Jäckel, A., Kopp, E., Korth, A., LeRoy, L., Mall, U., Marty, B., Mousis, O., Neefs, E., Owen, T., Rème, H., Rubin, M., Sémon, T., Tzou, C.-Y., Waite, H., and Wurz, P.

Published
2015

26. The DREAMS Experiment Onboard the Schiaparelli Module of the ExoMars 2016 Mission: Design, Performances and Expected Results

Author

Esposito, F., Debei, S., Bettanini, C., Molfese, C., Arruego Rodríguez, I., Colombatti, G., Harri, A.-M., Montmessin, F., Wilson, C., Aboudan, A., Schipani, P., Marty, L., Álvarez, F. J., Apestigue, V., Bellucci, G., Berthelier, J.-J., Brucato, J. R., Calcutt, S. B., Chiodini, S., Cortecchia, F., Cozzolino, F., Cucciarrè, F., Deniskina, N., Déprez, G., Di Achille, G., Ferri, F., Forget, F., Franzese, G., Friso, E., Genzer, M., Hassen-Kodja, R., Haukka, H., Hieta, M., Jiménez, J. J., Josset, J.-L., Kahanpää, H., Karatekin, O., Landis, G., Lapauw, L., Lorenz, R., Martinez-Oter, J., Mennella, V., Möhlmann, D., Moirin, D., Molinaro, R., Nikkanen, T., Palomba, E., Patel, M. R., Pommereau, J.-P., Popa, C. I., Rafkin, S., Rannou, P., Renno, N. O., Rivas, J., Schmidt, W., Segato, E., Silvestro, S., Spiga, A., Toledo, D., Trautner, R., Valero, F., Vázquez, L., Vivat, F., Witasse, O., Yela, M., Mugnuolo, R., Marchetti, E., and Pirrotta, S.

Published
2018
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30. Cassini Plasma Spectrometer Investigation

Author

Young, D. T., Berthelier, J. J., Blanc, M., Burch, J. L., Coates, A. J., Goldstein, R., Grande, M., Hill, T. W., Johnson, R. E., Kelha, V., McComas, D. J., Sittler, E. C., Svenes, K. R., Szegö, K., Tanskanen, P., Ahola, K., Anderson, D., Bakshi, S., Baragiola, R. A., Barraclough, B. L., Black, R. K., Bolton, S., Booker, T., Bowman, R., Casey, P., Crary, F. J., Delapp, D., Dirks, G., Eaker, N., Funsten, H., Furman, J. D., Gosling, J. T., Hannula, H., Holmlund, C., Huomo, H., Illiano, J. M., Jensen, P., Johnson, M. A., Linder, D. R., Luntama, T., Maurice, S., McCabe, K. P., Mursula, K., Narheim, B. T., Nordholt, J. E., Preece, A., Rudzki, J., Ruitberg, A., Smith, K., Szalai, S., Thomsen, M. F., Viherkanto, K., Vilppola, J., Vollmer, T., Wahl, T. E., Wüest, M., Ylikorpi, T., Zinsmeyer, C., and Russell, Christopher T., editor

Published
2004
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31. High-Altitude Observations of the Polar Wind

Author

Moore, T. E., Chappell, C. R., Chandler, M. O., Craven, P. D., Giles, B. L., Pollock, C. J., Burch, J. L., Young, D. T., Waite, J. H., Nordholt, J. E., Thomsen, M. F., McComas, D. J., Berthelier, J. J., Williamson, W. S., Robson, R., and Mozer, F. S.

Published
1997

32. Abundant molecular oxygen in the coma of comet 67P/Churyumov-Gerasimenko

Author

Bieler, A., Altwegg, K., Balsiger, H., Bar-Nun, A., Berthelier, J.-J., Bochsler, P., Briois, C., Calmonte, U., Combi, M., De Keyser, J., van Dishoeck, E.F., Fiethe, B., Fuselier, S.A., Gasc, S., Gombosi, T.I., Hansen, K.C., Hassig, M., Jackel, A., Kopp, E., Korth, A., Roy, L. Le, Mall, U., Maggiolo, R., Marty, B., Mousis, O., Owen, T., Reme, H., Rubin, M., Semon, T., Tzou, C.-Y., Waite, J.H., Walsh, C., and Wurz, P.

Subjects
Comets -- Chemical properties -- Observations, Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

The composition of the neutral gas comas of most comets is dominated by [H.sub.2]O, CO and C[O.sub.2], typically comprising as much as 95 per cent of the total gas density (1). In addition, cometary comas have been found to contain a rich array of other molecules, including sulfuric compounds and complex hydrocarbons. Molecular oxygen ([O.sub.2]), however, despite its detection on other icy bodies such as the moons of Jupiter and Saturn (2,3), has remained undetected in cometary comas. Here we report in situ measurement of [O.sub.2] in the coma of comet 67P/Churyumov-Gerasimenko, with local abundances ranging from one per cent to ten per cent relative to [H.sub.2]O and with a mean value of 3.80 ± 0.85 per cent. Our observations indicate that the [O.sub.2]/[H.sub.2]O ratio is isotropic in the coma and does not change systematically with heliocentric distance. This suggests that primordial [O.sub.2] was incorporated into the nucleus during the comet's formation, which is unexpected given the low upper limits from remote sensing observations (4). Current Solar System formation models do not predict conditions that would allow this to occur., Measurements of the coma of 67P/Churyumov-Gerasimenko (hereafter 67P) were made between September 2014 and March 2015 with the ROSINA-DFMS mass spectrometer (5) on board the Rosetta spacecraft. For the present [...]

Published
2015

33. Applications of Electrified Dust and Dust Devil Electrodynamics to Martian Atmospheric Electricity

Author

Harrison, R. G., primary, Barth, E., additional, Esposito, F., additional, Merrison, J., additional, Montmessin, F., additional, Aplin, K. L., additional, Borlina, C., additional, Berthelier, J. J., additional, Déprez, G., additional, Farrell, W. M., additional, Houghton, I. M. P., additional, Renno, N. O., additional, Nicoll, K. A., additional, Tripathi, S. N., additional, and Zimmerman, M., additional

Published
2017
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37. Refractory elements in the gas phase for comet 67P/Churyumov-Gerasimenko. Possible release of atomic Na, Si, and Fe from nanograins

Author

Rubin, M., primary, Altwegg, K., additional, Berthelier, J.-J., additional, Combi, M. R., additional, De Keyser, J., additional, Dhooghe, F., additional, Fuselier, S., additional, Gombosi, T. I., additional, Hänni, N., additional, Müller, D., additional, Pestoni, B., additional, Wampfler, S. F., additional, and Wurz, P., additional

Published
2021
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38. COMETARY FORMATION: Molecular nitrogen in comet 67P/Churyumov-Gerasimenko indicates a low formation temperature

Author

Rubin, M., Altwegg, K., Balsiger, H., Bar-Nun, A., Berthelier, J.-J., Bieler, A., Bochsler, P., Briois, C., Calmonte, U., Combi, M., De Keyser, J., Dhooghe, F., Eberhardt, P., Fiethe, B., Fuselier, S. A., Gasc, S., Gombosi, T. I., Hansen, K. C., Hässig, M., Jäckel, A., Kopp, E., Korth, A., Le Roy, L., Mall, U., Marty, B., Mousis, O., Owen, T., Rème, H., Sémon, T., Tzou, C.-Y., Waite, J. H., and Wurz, P.

Published
2015
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42. Correction to: SERENA: Particle Instrument Suite for Determining the Sun-Mercury Interaction from BepiColombo (Space Science Reviews, (2021), 217, 1, (11), 10.1007/s11214-020-00787-3)

Author

Orsini, S. Livi, S.A. Lichtenegger, H. Barabash, S. Milillo, A. De Angelis, E. Phillips, M. Laky, G. Wieser, M. Olivieri, A. Plainaki, C. Ho, G. Killen, R.M. Slavin, J.A. Wurz, P. Berthelier, J.-J. Dandouras, I. Kallio, E. McKenna-Lawlor, S. Szalai, S. Torkar, K. Vaisberg, O. Allegrini, F. Daglis, I.A. Dong, C. Escoubet, C.P. Fatemi, S. Fränz, M. Ivanovski, S. Krupp, N. Lammer, H. Leblanc, F. Mangano, V. Mura, A. Nilsson, H. Raines, J.M. Rispoli, R. Sarantos, M. Smith, H.T. Szego, K. Aronica, A. Camozzi, F. Di Lellis, A.M. Fremuth, G. Giner, F. Gurnee, R. Hayes, J. Jeszenszky, H. Tominetti, F. Trantham, B. Balaz, J. Baumjohann, W. Brienza, D. Bührke, U. Bush, M.D. Cantatore, M. Cibella, S. Colasanti, L. Cremonese, G. Cremonesi, L. D’Alessandro, M. Delcourt, D. Delva, M. Desai, M. Fama, M. Ferris, M. Fischer, H. Gaggero, A. Gamborino, D. Garnier, P. Gibson, W.C. Goldstein, R. Grande, M. Grishin, V. Haggerty, D. Holmström, M. Horvath, I. Hsieh, K.-C. Jacques, A. Johnson, R.E. Kazakov, A. Kecskemety, K. Krüger, H. Kürbisch, C. Lazzarotto, F. Leblanc, F. Leichtfried, M. Leoni, R. Loose, A. Maschietti, D. Massetti, S. Mattioli, F. Miller, G. Moissenko, D. Morbidini, A. Noschese, R. Nuccilli, F. Nunez, C. Paschalidis, N. Persyn, S. Piazza, D. Oja, M. Ryno, J. Schmidt, W. Scheer, J.A. Shestakov, A. Shuvalov, S. Seki, K. Selci, S. Smith, K. Sordini, R. Svensson, J. Szalai, L. Toublanc, D. Urdiales, C. Varsani, A. Vertolli, N. Wallner, R. Wahlstroem, P. Wilson, P. Zampieri, S.

Subjects
GeneralLiterature_INTRODUCTORYANDSURVEY
Abstract

The original online version of this article was revised because a number of authors had the wrong affiliation number next to their names. © 2021, Springer Nature B.V.

Published
2021

43. Rosina – Rosetta Orbiter Spectrometer for Ion and Neutral Analysis

Author

Balsiger, H., Altwegg, K., Bochsler, P., Eberhardt, P., Fischer, J., Graf, S., Jäckel, A., Kopp, E., Langer, U., Mildner, M., Müller, J., Riesen, T., Rubin, M., Scherer, S., Wurz, P., Wüthrich, S., Arijs, E., Delanoye, S., Keyser, J. De, Neefs, E., Nevejans, D., Rème, H., Aoustin, C., Mazelle, C., Médale, J.-L., Sauvaud, J. A., Berthelier, J.-J., Bertaux, J.-L., Duvet, L., Illiano, J.-M., Fuselier, S. A., Ghielmetti, A. G., Magoncelli, T., Shelley, E. G., Korth, A., Heerlein, K., Lauche, H., Livi, S., Loose, A., Mall, U., Wilken, B., Gliem, F., Fiethe, B., Gombosi, T. I., Block, B., Carignan, G. R., Fisk, L. A., Waite, J. H., Young, D. T., and Wollnik, H.

Published
2007
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44. The Dymio Ion Mass Spectrometer of the Mars 96 Mission

Author

Berthelier, J.-J., primary, Illiano, J. M., additional, Hodges, R. R., additional, Covinhes, J., additional, Godefroy, M., additional, Gogly, G., additional, Guillou, J., additional, Le Goff, F., additional, Leblanc, F., additional, Racic, Z., additional, Rouchette, P., additional, Krankowsky, D., additional, Dorflinger, D., additional, Vaisberg, O., additional, Smimov, V., additional, and Kolesova, N., additional

Published
2013
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47. Cassini Plasma Spectrometer Investigation

Author

Young, D. T., primary, Barraclough, B. L., additional, Berthelier, J. J., additional, Blanc, M., additional, Burch, J. L., additional, Coates, A. J., additional, Goldstein, R., additional, Grande, M., additional, Hill, T. W., additional, Illiano, J. M., additional, Johnson, M. A., additional, Johnson, R. E., additional, Baragiola, R. A., additional, Kelha, V., additional, Linder, D., additional, McComas, D. J., additional, Narheim, B. T., additional, Nordholt, J. E., additional, Preece, A., additional, Sittler, E. C., additional, Svenes, K. R., additional, Szalai, S., additional, Szegö, K., additional, Tanskanen, P., additional, and Viherkanto, K., additional

Published
2013
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48. A new numerical model for the simulation of ELF wave propagation and the computation of eigenmodes in the atmosphere of Titan: Did Huygens observe any Schumann resonance?

Author

Simões, F., Grard, R., Hamelin, M., López-Moreno, J.J., Schwingenschuh, K., Béghin, C., Berthelier, J.-J., Besser, B., Brown, V.J.G., Chabassière, M., Falkner, P., Ferri, F., Fulchignoni, M., Hofe, R., Jernej, I., Jeronimo, J.M., Molina-Cuberos, G.J., Rodrigo, R., Svedhem, H., Tokano, T., and Trautner, R.

Published
2007
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49. Composition and dynamics of plasma in Saturn's magnetosphere

Author

Young, D.T., Berthelier, J.-J., Blanc, M., Burch, J.L., Bolton, S., Coates, A.J., Crary, F.J., Goldstein, R., Grande, M., Hill, T.W., Johnson, R.E., Baragiola, R.A., Kelha, V., McComas, D.J., Mursula, K., Sittler, E.C., Svenes, K.R., Szego, K., Tanskanen, P., Thomsen, M.F., Bakshi, S., Barraclough, B.L., Bebesi, Z., Delapp, D., Dunlop, M.W., Gosling, J.T., Furman, J.D., Gilbert, L.K., Glenn, D., Holmlund, C., Illiano, J.-M., Lewis, G.R., Linder, D.R., Maurice, S., McAndrews, H.J., Narheim, B.T., Pallier, E., Reisenfeld, D., Rymer, A.M., Smith, H.T., Tokar, R.L., Vilppola, J., and Zinsmeyer, C.

Subjects
Spectrometer -- Usage, Plasma (Ionized gases) -- Research -- Usage, High temperature plasmas -- Research -- Usage, Magnetosphere -- Research -- Usage, Saturn (Planet) -- Research -- Usage, Science and technology
Abstract

During Cassini's initial orbit, we observed a dynamic magnetosphere composed primarily of a complex mixture of water-derived atomic and molecular ions. We have identified four distinct regions characterized by differences in both bulk plasma properties and ion composition. Protons are the dominant species outside about 9 [R.sub.S] (where [R.sub.S] is the radial distance from the center of Saturn), whereas inside, the plasma consists primarily of a corotating comet-like mix of water-derived ions with ~3% [N.sup.+]. Over the A and B rings, we found an ionosphere in which [O.sub.2.sup.+] and [O.sup.+] are dominant, which suggests the possible existence of a layer of [O.sub.2] gas similar to the atmospheres of Europa and Ganymede., Most of what was known about Saturn's magnetosphere before Cassini's arrival was derived from the Pioneer 11 and Voyager 1 and 2 encounters from 1979 to 1981 (1-5) and from [...]

Published
2005

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