Evolution of the Auroral Signatures of Jupiter's Magnetospheric Injections

[en] Auroral emissions equatorward of the main emission at Jupiter are suggested to reflect the dynamics of the plasma in the middle magnetosphere. Here, we examine the motion of the auroral signatures of magnetospheric injections appearing in Hubble Space Telescope (HST) images. Our results suggest that the injected plasma moves planetward and lags behind corotation. We then compare the characteristics of the observed signatures with simulations of the auroral precipitation related to injections due to pitch angle scattering. These results indicate that the lifetime of the auroral structures lies between a half and a full rotation of Jupiter. Ultraviolet (UV) spectrally resolved images acquired with HST are then used to highlight the energy-dependent drift of the electrons in auroral injection signatures. Comparison of these observations with simulations of the energy-dependent drift of injected particles suggests that these structures are 3 hours old. Finally, we extend our investigations towards larger and less structured outer emissions possibly associated with younger plasma injections. The motion and evolution of these features are similar to those of the small and compact ones considered in the first part of the study.

Research center :

STAR - Space sciences, Technologies and Astrophysics Research - ULiège

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Dumont, Maïté ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)

Grodent, Denis ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)

Radioti, Aikaterini ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)

Bonfond, Bertrand ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)

Roussos, E.

Paranicas, C.

Language :

English

Title :

Evolution of the Auroral Signatures of Jupiter's Magnetospheric Injections

Publication date :

2018

Journal title :

Journal of Geophysical Research. Space Physics

ISSN :

2169-9380

eISSN :

2169-9402

Publisher :

Wiley, Hoboken, United States - New Jersey

Volume :

123

Issue :

Peer reviewed :

Peer Reviewed verified by ORBi

Funders :

BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]

Available on ORBi :

since 15 October 2018

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Bibliography

Achilleos, N., André, N., Blanco-Cano, X., Brandt, P. C., Delamere, P. A., & Winglee, R. (2015). 1. Transport of mass, momentum and energy in planetary magnetodisc regions. Space Science Reviews, 187(1-4), 229–299. https://doi.org/10.1007/s11214-014-0086-y
Bonfond, B., Gladstone, G. R., Grodent, D., Greathouse, T. K., Versteeg, M. H., Hue, V., Davis, M. W., Vogt, M. F., Gérard, J. C., Radioti, A., Bolton, S., Levin, S. M., Connerney, J. E. P., Mauk, B. H., Valek, P., Adriani, A., & Kurth, W. S. (2017). Morphology of the UV aurorae Jupiter during Juno's first perijove observations. Geophysical Research Letters, 44, 4463–4471. https://doi.org/10.1002/2017GL073114
Bonfond, B., Grodent, D., Gérard, J. C., Stallard, T., Clarke, J. T., Yoneda, M., Radioti, A., & Gustin, J. (2012). Auroral evidence of Io's control over the magnetosphere of Jupiter. Geophysical Research Letters, 39, L01105. https://doi.org/10.1029/2011GL050253
Bonfond, B., Vogt, M. F., Gérard, J. C., Grodent, D., Radioti, A., & Coumans, V. (2011). Quasi-periodic polar flares at Jupiter: A signature of pulsed dayside reconnections? Geophysical Research Letters, 38, L02104. https://doi.org/10.1029/2010GL045981
Clarke, J. T., Nichols, J., Gérard, J. C., Grodent, D., Hansen, K. C., Kurth, W., Gladstone, G. R., Duval, J., Wannawichian, S., Bunce, E., Cowley, S. W. H., Crary, F., Dougherty, M., Lamy, L., Mitchell, D., Pryor, W., Retherford, K., Stallard, T., Zieger, B., Zarka, P., & Cecconi, B. (2009). Response of Jupiter's and Saturn's auroral activity to the solar wind. Journal of Geophysical Research, 114, A05210. https://doi.org/10.1029/2008JA013694
Connerney, J. E. P., Kotsiaros, S., Oliversen, R. J., Espley, J. R., Joergensen, J. L., Joergensen, P. S., Merayo, J. M. G., Herceg, M., Bloxham, J., Moore, K. M., Bolton, S. J., & Levin, S. M. (2018). A new model of Jupiter's magnetic field from Juno's first nine orbits. Geophysical Research Letters, 45, 2590–2596. https://doi.org/10.1002/2018GL077312
Cowley, S. W. H., & Bunce, E. J. (2001). Origin of the main auroral oval in Jupiter's coupled magnetosphere-ionosphere system. Planetary and Space Science, 49(10–11), 1067–1088. https://doi.org/10.1016/s0032-0633(00)00167-7
Dumont, M., Grodent, D., Radioti, A., Bonfond, B., & Gérard, J. C. (2014). Jupiter's equatorward auroral features: Possible signatures of magnetospheric injections. Journal of Geophysical Research: Space Physics, 119, 10,068–010,077. https://doi.org/10.1002/2014JA020527
Gérard, J. C., Bonfond, B., Grodent, D., Radioti, A., Clarke, J. T., Gladstone, G. R., Waite, J. H., Bisikalo, D., & Shematovich, V. I. (2014). Mapping the electron energy in Jupiter's aurora: Hubble spectral observations. Journal of Geophysical Research: Space Physics, 119, 9072–9088. https://doi.org/10.1002/2014JA020514
Gray, R. L., Badman, S. V., Bonfond, B., Kimura, T., Misawa, H., Nichols, J. D., Vogt, M. F., & Ray, L. C. (2016). Auroral evidence of radial transport at Jupiter during January 2014. Journal of Geophysical Research: Space Physics, 121, 9972–9984. https://doi.org/10.1002/2016JA023007
Gray, R. L., Badman, S. V., Woodfield, E. E., & Tao, C. (2017). Characterization of Jupiter's secondary auroral oval and its response to hot plasma injections. Journal of Geophysical Research: Space Physics, 122, 6415–6429. https://doi.org/10.1002/2017JA024214
Grodent, D., Bonfond, B., Gérard, J.-C., Radioti, A., Gustin, J., Clarke, J. T., Nichols, J., & Connerney, J. E. P. (2008). Auroral evidence of a localized magnetic anomaly in Jupiter's northern hemisphere. Journal of Geophysical Research, 113, A09201. https://doi.org/10.1029/2008JA013185
Gustin, J., Bonfond, B., Grodent, D., & Gérard, J. C. (2012). Conversion from HST ACS and STIS auroral counts into brightness, precipitated power, and radiated power for H2 giant planets. Journal of Geophysical Research, 117, A07316. https://doi.org/10.1029/2012JA017607
Gustin, J., Grodent, D., Ray, L. C., Bonfond, B., Bunce, E. J., Nichols, J. D., & Ozak, N. (2016). Characteristics of north jovian aurora from STIS FUV spectral images. Icarus, 268, 215–241. https://doi.org/10.1016/j.icarus.2015.12.048
Hess, S. L. G., Bonfond, B., Zarka, P., & Grodent, D. (2011). Model of the Jovian magnetic field topology constrained by the Io auroral emissions. Journal of Geophysical Research, A, 116, A05217. https://doi.org/10.1029/2010ja016262
Hill, T. (2016). Penetration of external plasma into a rotation-driven magnetosphere. Journal of Geophysical Research: Space Physics, 121, 10,032–010,036. https://doi.org/10.1002/2016JA023430
Kimura, T., Badman, S. V., Tao, C., Yoshioka, K., Murakami, G., Yamazaki, A., Tsuchiya, F., Bonfond, B., Steffl, A. J., Masters, A., Kasahara, S., Hasegawa, H., Yoshikawa, I., Fujimoto, M., & Clarke, J. T. (2015). Transient internally driven aurora at Jupiter discovered by Hisaki and the Hubble space telescope. Geophysical Research Letters, 42, 1662–1668. https://doi.org/10.1002/2015GL063272
Kivelson, M. G., & Russell, C. T. (1995). Introduction to space physics. Cambridge, New York: Cambridge University Press
Li, W., Thorne, R. M., Ma, Q., Zhang, X. J., Gladstone, G. R., Hue, V., Valek, P. W., Allegrini, F., Mauk, B. H., Clark, G., Kurth, W. S., Hospodarsky, G. B., Connerney, J. E. P., & Bolton, S. J. (2017). Understanding the origin of Jupiter's diffuse aurora using Juno's first perijove observations. Geophysical Research Letters, 44, 10,162–110,170. https://doi.org/10.1002/2017GL075545
Louarn, P., Andre, N., Jackman, C., Kasahara, S., Kronberg, E., & Vogt, M. (2014). Magnetic reconnection and associated transient phenomena within the magnetospheres of Jupiter and Saturn. Space Science Reviews, 187, 181–227. https://doi.org/10.1007/s11214-014-0047-5
Mauk, B. H., Clarke, J. T., Grodent, D., Watte, J. H. Jr., Paranicas, C. P., & Williams, D. J. (2002). Transient aurora on Jupiter from injections of magnetospheric electrons. Nature, 415, 1003–1005. https://doi.org/10.1038/4151003a
Mauk, B. H., Williams, D. J., & McEntire, R. W. (1997). Energy-time dispersed charged particle signatures of dynamic injections in Jupiter's inner magnetosphere. Geophysical Research Letters, 24(23), 2949–2952. https://doi.org/10.1029/97gl03026
Mauk, B. H., Williams, D. J., McEntire, R. W., Khurana, K. K., & Roederer, J. G. (1999). Storm-like dynamics of Jupiter's inner and middle magnetosphere. Journal of Geophysical Research, 104(A10), 22,759–22,778. https://doi.org/10.1029/1999ja900097
Radioti, A., Roussos, E., Grodent, D., Gérard, J. C., Krupp, N., Mitchell, D. G., Gustin, J., Bonfond, B., & Pryor, W. (2013). Signatures of magnetospheric injections in Saturn's aurora. Journal of Geophysical Research: Space Physics, 118, 1922–1933. https://doi.org/10.1002/jgra.50161
Radioti, A., Tomás, A. T., Grodent, D., Gérard, J. C., Gustin, J., Bonford, B., Krupp, N., Woch, J., & Menietti, J. D. (2009). Equatorward diffuse auroral emissions at Jupiter: Simultaneous HST and Galileo observations. Geophysical Research Letters, 36, L07101. https://doi.org/10.1029/2009GL037857
Schulz, M., & Lanzerotti, L. (1974). Particle diffusion in the radiation belt. New York: Springer. https://doi.org/10.1007/978-3-642-65675-0
Siscoe, G. L., & Summers, D. (1981). Centrifugally driven diffusion of Iogenic plasma. Journal of Geophysical Research, 86(A10), 8471–8479. https://doi.org/10.1029/JA086iA10p08471
Xu, C., & Prince, J. L. (1998). Snakes, shapes, and gradient vector flow. IEEE Transactions on Image Processing, 7(3), 359–369. https://doi.org/10.1109/83.661186
Yung, Y. L., Gladstone, G. R., Chang, K. M., Ajello, J. M., & Srivastava, S. K. (1982). H2 fluorescence spectrum from 1200 to 1700 A by electron impact—Laboratory study and application to Jovian aurora. Astrophysical Journal, 254, L65–L69. https://doi.org/10.1086/183757