Zobrazeno 1 - 10
of 473
pro vyhledávání: '"Galand M"'
Autor:
Stephenson, P., Beth, A., Deca, J., Galand, M., Goetz, C., Henri, P., Heritier, K., Lewis, Z., Moeslinger, A., Nilsson, H., Rubin, M.
We examine the origin of electrons in a weakly outgassing comet, using Rosetta mission data and a 3D collisional model of electrons at a comet. We have calculated a new dataset of electron-impact ionization (EII) frequency throughout the Rosetta esco
Externí odkaz:
http://arxiv.org/abs/2306.12942
Autor:
Chadney, J. M., Koskinen, T. T., Hu, X., Galand, M., Lavvas, P., Unruh, Y. C., Serigano, J., Hörst, S. M., Yelle, R. V.
We construct Saturn equatorial neutral temperature and density profiles of H, H$_2$, He, and CH$_4$, between 10$^{-12}$ and 1 bar using measurements from Cassini's Ion Neutral Mass Spectrometer (INMS) taken during the spacecraft's final plunge into S
Externí odkaz:
http://arxiv.org/abs/2110.08014
Autor:
De Keyser, J., Edberg, N.J.T., Henri, P., Auster, H.-U., Galand, M., Rubin, M., Nilsson, H., Soucek, J., André, N., Corte, V. Della, Rothkaehl, H., Funase, R., Kasahara, S., Van Damme, C. Corral
Publikováno v:
In Planetary and Space Science May 2024 244
Autor:
Stephenson, P., Galand, M., Feldman, P. D., Beth, A., Rubin, M., Bockelée-Morvan, D., Biver, N., Cheng, Y. -C, Parker, J., Burch, J., Johansson, F. L., Eriksson, A.
Aims. We aim to determine whether dissociative excitation of cometary neutrals by electron impact is the major source of far-ultraviolet (FUV) emissions at comet 67P/Churyumov-Gerasimenko in the southern hemisphere at large heliocentric distances, bo
Externí odkaz:
http://arxiv.org/abs/2101.12139
Autor:
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., Sémon, T.
Publikováno v:
A&A 642, A27 (2020)
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 co
Externí odkaz:
http://arxiv.org/abs/2008.08430
Autor:
Madanian, H., Burch, J. L., Eriksson, A. I., Cravens, T. E., Galand, M., Vigren, E., Goldstein, R., Nemeth, Z., Mokashi, P., Richter, I., Rubin, M.
Publikováno v:
Planetary and Space Science, 187, 104924 (2020)
The Rosetta spacecraft detected transient and sporadic diamagnetic regions around comet 67P/Churyumov-Gerasimenko. In this paper we present a statistical analysis of bulk and suprathermal electron dynamics, as well as a case study of suprathermal ele
Externí odkaz:
http://arxiv.org/abs/2007.05827
Autor:
Bockelée-Morvan, D., Filacchione, G., Altwegg, K., Bianchi, E., Bizzarro, M., Blum, J., Bonal, L., Capaccioni, F., Codella, C., Choukroun, M., Cottin, H., Davidsson, B., De Sanctis, M. C., Drozdovskaya, M., Engrand, C., Galand, M., Güttler, C., Henri, P., Herique, A., Ivanoski, S., Kokotanekova, R., Levasseur-Regourd, A. -C., Miller, K. E., Rotundi, A., Schönbächler, M., Snodgrass, C., Thomas, N., Tubiana, C., Ulamec, S., Vincent, J. -B.
This white paper proposes that AMBITION, a Comet Nucleus Sample Return mission, be a cornerstone of ESA's Voyage 2050 programme. We summarise some of the most important questions still open in cometary science after the successes of the Rosetta missi
Externí odkaz:
http://arxiv.org/abs/1907.11081
Autor:
Leblanc, F., Roth, L., Chaufray, J.Y., Modolo, R., Galand, M., Ivchenko, N., Carnielli, G., Baskevitch, C., Oza, A., Werner, A.L.E.
Publikováno v:
In Icarus 15 July 2023 399
Modelling H$_{3}^{+}$ in planetary atmospheres: effects of vertical gradients on observed quantities
Autor:
Moore, L., Melin, H., O'Donoghue, J., Stallard, T., Moses, J., Galand, M., Miller, S., Schmidt, C.
Since its discovery in the aurorae of Jupiter ~30 years ago, the H$_{3}^{+}$ ion has served as an invaluable probe of giant planet upper atmospheres. However, the vast majority of monitoring of planetary H$_{3}^{+}$ radiation has followed from observ
Externí odkaz:
http://arxiv.org/abs/1904.04284
Publikováno v:
A&A 608, A75 (2017)
Stellar flares are a frequent occurrence on young low-mass stars around which many detected exoplanets orbit. Flares are energetic, impulsive events, and their impact on exoplanetary atmospheres needs to be taken into account when interpreting transi
Externí odkaz:
http://arxiv.org/abs/1710.08365