Effects of Saturn's magnetospheric dynamics on Titan's ionosphere

We use the Cassini Radio and Plasma Wave Science/Langmuir probe measurements of the electron density from the first 110 flybys of Titan to study how Saturn's magnetosphere influences Titan's ionosphere. The data is first corrected for biased sampling due to varying solar zenith angle and s...

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Autores principales:	Edberg, N.J.T., Andrews, D.J., Bertucci, C., Gurnett, D.A., Holmberg, M.K.G., Jackman, C.M., Kurth, W.S., Menietti, J.D., Opgenoorth, H.J., Shebanits, O., Vigren, E., Wahlund, J.-E.
Formato:	JOUR
Materias:	Cassini ionosphere Saturn's magnetosphere Titan
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_21699380_v120_n10_p8884_Edberg
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_21699380_v120_n10_p8884_Edberg
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spelling	todo:paper_21699380_v120_n10_p8884_Edberg2023-10-03T16:39:59Z Effects of Saturn's magnetospheric dynamics on Titan's ionosphere Edberg, N.J.T. Andrews, D.J. Bertucci, C. Gurnett, D.A. Holmberg, M.K.G. Jackman, C.M. Kurth, W.S. Menietti, J.D. Opgenoorth, H.J. Shebanits, O. Vigren, E. Wahlund, J.-E. Cassini ionosphere Saturn's magnetosphere Titan We use the Cassini Radio and Plasma Wave Science/Langmuir probe measurements of the electron density from the first 110 flybys of Titan to study how Saturn's magnetosphere influences Titan's ionosphere. The data is first corrected for biased sampling due to varying solar zenith angle and solar energy flux (solar cycle effects). We then present results showing that the electron density in Titan's ionosphere, in the altitude range 1600-2400 km, is increased by about a factor of 2.5 when Titan is located on the nightside of Saturn (Saturn local time (SLT) 21-03 h) compared to when on the dayside (SLT 09-15 h). For lower altitudes (1100-1600 km) the main dividing factor for the ionospheric density is the ambient magnetospheric conditions. When Titan is located in the magnetospheric current sheet, the electron density in Titan's ionosphere is about a factor of 1.4 higher compared to when Titan is located in the magnetospheric lobes. The factor of 1.4 increase in between sheet and lobe flybys is interpreted as an effect of increased particle impact ionization from 200 eV sheet electrons. The factor of 2.5 increase in electron density between flybys on Saturn's nightside and dayside is suggested to be an effect of the pressure balance between thermal plus magnetic pressure in Titan's ionosphere against the dynamic pressure and energetic particle pressure in Saturn's magnetosphere. ©2015. American Geophysical Union. All Rights Reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_21699380_v120_n10_p8884_Edberg
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Cassini ionosphere Saturn's magnetosphere Titan
spellingShingle	Cassini ionosphere Saturn's magnetosphere Titan Edberg, N.J.T. Andrews, D.J. Bertucci, C. Gurnett, D.A. Holmberg, M.K.G. Jackman, C.M. Kurth, W.S. Menietti, J.D. Opgenoorth, H.J. Shebanits, O. Vigren, E. Wahlund, J.-E. Effects of Saturn's magnetospheric dynamics on Titan's ionosphere
topic_facet	Cassini ionosphere Saturn's magnetosphere Titan
description	We use the Cassini Radio and Plasma Wave Science/Langmuir probe measurements of the electron density from the first 110 flybys of Titan to study how Saturn's magnetosphere influences Titan's ionosphere. The data is first corrected for biased sampling due to varying solar zenith angle and solar energy flux (solar cycle effects). We then present results showing that the electron density in Titan's ionosphere, in the altitude range 1600-2400 km, is increased by about a factor of 2.5 when Titan is located on the nightside of Saturn (Saturn local time (SLT) 21-03 h) compared to when on the dayside (SLT 09-15 h). For lower altitudes (1100-1600 km) the main dividing factor for the ionospheric density is the ambient magnetospheric conditions. When Titan is located in the magnetospheric current sheet, the electron density in Titan's ionosphere is about a factor of 1.4 higher compared to when Titan is located in the magnetospheric lobes. The factor of 1.4 increase in between sheet and lobe flybys is interpreted as an effect of increased particle impact ionization from 200 eV sheet electrons. The factor of 2.5 increase in electron density between flybys on Saturn's nightside and dayside is suggested to be an effect of the pressure balance between thermal plus magnetic pressure in Titan's ionosphere against the dynamic pressure and energetic particle pressure in Saturn's magnetosphere. ©2015. American Geophysical Union. All Rights Reserved.
format	JOUR
author	Edberg, N.J.T. Andrews, D.J. Bertucci, C. Gurnett, D.A. Holmberg, M.K.G. Jackman, C.M. Kurth, W.S. Menietti, J.D. Opgenoorth, H.J. Shebanits, O. Vigren, E. Wahlund, J.-E.
author_facet	Edberg, N.J.T. Andrews, D.J. Bertucci, C. Gurnett, D.A. Holmberg, M.K.G. Jackman, C.M. Kurth, W.S. Menietti, J.D. Opgenoorth, H.J. Shebanits, O. Vigren, E. Wahlund, J.-E.
author_sort	Edberg, N.J.T.
title	Effects of Saturn's magnetospheric dynamics on Titan's ionosphere
title_short	Effects of Saturn's magnetospheric dynamics on Titan's ionosphere
title_full	Effects of Saturn's magnetospheric dynamics on Titan's ionosphere
title_fullStr	Effects of Saturn's magnetospheric dynamics on Titan's ionosphere
title_full_unstemmed	Effects of Saturn's magnetospheric dynamics on Titan's ionosphere
title_sort	effects of saturn's magnetospheric dynamics on titan's ionosphere
url	http://hdl.handle.net/20.500.12110/paper_21699380_v120_n10_p8884_Edberg
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Effects of Saturn's magnetospheric dynamics on Titan's ionosphere

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