Dynamics of Saturn's magnetodisk near Titan's orbit: Comparison of Cassini magnetometer observations from real and virtual Titan flybys
We analyze the variability of the ambient magnetospheric field along Titan's orbit at 20.3 Saturn radii. However, while our preceding study (Simon et al., 2010) focused on Cassini magnetometer observations from the 62 Titan flybys (TAT62) between October 2004 and October 2009, the present work...
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2010
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00320633_v58_n12_p1625_Simon http://hdl.handle.net/20.500.12110/paper_00320633_v58_n12_p1625_Simon |
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paper:paper_00320633_v58_n12_p1625_Simon2023-06-08T14:59:51Z Dynamics of Saturn's magnetodisk near Titan's orbit: Comparison of Cassini magnetometer observations from real and virtual Titan flybys Cassini flybys Magnetodisk current sheet and lobes Plasma interaction with unmagnetized bodies Saturn's magnetosphere Titan Background field Cassini Cassini magnetometer Current sheets Distorted currents Field observations Magnetic field data Magnetospheric field Orbital planes Oscillatory motion Rapid transitions Saturn's magnetosphere Titan Magnetic field effects Magnetometers Magnetosphere Plasma interactions Orbits We analyze the variability of the ambient magnetospheric field along Titan's orbit at 20.3 Saturn radii. However, while our preceding study (Simon et al., 2010) focused on Cassini magnetometer observations from the 62 Titan flybys (TAT62) between October 2004 and October 2009, the present work discusses magnetic field data that were collected near Titan's orbit when the moon was far away. In analogy to the observations during TAT62, the magnetospheric fields detected during these 79 "virtual" Titan flybys are strongly affected by the presence of Saturn's bowl-shaped and highly dynamic magnetodisk current sheet. We therefore provide a systematic classification of the magnetic field observations as magnetodisk current sheet or lobe-type scenarios. Among the 141 (62 real79 virtual) crossings of Titan's orbit between July 2004 and December 2009, only 17 encounters (9 real8 virtual) took place within quiet, magnetodisk lobe-type fields. During another 50 encounters (21 real29 virtual), rapid transitions between current sheet and lobe fields were observed around the moon's orbital plane. Most of the encounters (54=22 real32 virtual) occurred when Titan's orbit was embedded in highly distorted current sheet fields, thereby invalidating the frequently applied idealized picture of Titan interacting with a homogeneous and stationary magnetospheric background field. The locations of real and virtual Titan flybys are correlated to each other. Each of the 62 real Titan flybys possesses at least one virtual counterpart that occurred shortly before or after the real encounter and at nearly the same orbital position. A systematic comparison between Cassini magnetometer observations from the real Titan flybys and their virtual companions suggests that there is no clear evidence of Titan exerting a significant level of control on the vertical oscillatory motion of the magnetodisk near its orbit. © 2010 Elsevier Ltd. All rights reserved. 2010 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00320633_v58_n12_p1625_Simon http://hdl.handle.net/20.500.12110/paper_00320633_v58_n12_p1625_Simon |
| 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 flybys Magnetodisk current sheet and lobes Plasma interaction with unmagnetized bodies Saturn's magnetosphere Titan Background field Cassini Cassini magnetometer Current sheets Distorted currents Field observations Magnetic field data Magnetospheric field Orbital planes Oscillatory motion Rapid transitions Saturn's magnetosphere Titan Magnetic field effects Magnetometers Magnetosphere Plasma interactions Orbits |
| spellingShingle |
Cassini flybys Magnetodisk current sheet and lobes Plasma interaction with unmagnetized bodies Saturn's magnetosphere Titan Background field Cassini Cassini magnetometer Current sheets Distorted currents Field observations Magnetic field data Magnetospheric field Orbital planes Oscillatory motion Rapid transitions Saturn's magnetosphere Titan Magnetic field effects Magnetometers Magnetosphere Plasma interactions Orbits Dynamics of Saturn's magnetodisk near Titan's orbit: Comparison of Cassini magnetometer observations from real and virtual Titan flybys |
| topic_facet |
Cassini flybys Magnetodisk current sheet and lobes Plasma interaction with unmagnetized bodies Saturn's magnetosphere Titan Background field Cassini Cassini magnetometer Current sheets Distorted currents Field observations Magnetic field data Magnetospheric field Orbital planes Oscillatory motion Rapid transitions Saturn's magnetosphere Titan Magnetic field effects Magnetometers Magnetosphere Plasma interactions Orbits |
| description |
We analyze the variability of the ambient magnetospheric field along Titan's orbit at 20.3 Saturn radii. However, while our preceding study (Simon et al., 2010) focused on Cassini magnetometer observations from the 62 Titan flybys (TAT62) between October 2004 and October 2009, the present work discusses magnetic field data that were collected near Titan's orbit when the moon was far away. In analogy to the observations during TAT62, the magnetospheric fields detected during these 79 "virtual" Titan flybys are strongly affected by the presence of Saturn's bowl-shaped and highly dynamic magnetodisk current sheet. We therefore provide a systematic classification of the magnetic field observations as magnetodisk current sheet or lobe-type scenarios. Among the 141 (62 real79 virtual) crossings of Titan's orbit between July 2004 and December 2009, only 17 encounters (9 real8 virtual) took place within quiet, magnetodisk lobe-type fields. During another 50 encounters (21 real29 virtual), rapid transitions between current sheet and lobe fields were observed around the moon's orbital plane. Most of the encounters (54=22 real32 virtual) occurred when Titan's orbit was embedded in highly distorted current sheet fields, thereby invalidating the frequently applied idealized picture of Titan interacting with a homogeneous and stationary magnetospheric background field. The locations of real and virtual Titan flybys are correlated to each other. Each of the 62 real Titan flybys possesses at least one virtual counterpart that occurred shortly before or after the real encounter and at nearly the same orbital position. A systematic comparison between Cassini magnetometer observations from the real Titan flybys and their virtual companions suggests that there is no clear evidence of Titan exerting a significant level of control on the vertical oscillatory motion of the magnetodisk near its orbit. © 2010 Elsevier Ltd. All rights reserved. |
| title |
Dynamics of Saturn's magnetodisk near Titan's orbit: Comparison of Cassini magnetometer observations from real and virtual Titan flybys |
| title_short |
Dynamics of Saturn's magnetodisk near Titan's orbit: Comparison of Cassini magnetometer observations from real and virtual Titan flybys |
| title_full |
Dynamics of Saturn's magnetodisk near Titan's orbit: Comparison of Cassini magnetometer observations from real and virtual Titan flybys |
| title_fullStr |
Dynamics of Saturn's magnetodisk near Titan's orbit: Comparison of Cassini magnetometer observations from real and virtual Titan flybys |
| title_full_unstemmed |
Dynamics of Saturn's magnetodisk near Titan's orbit: Comparison of Cassini magnetometer observations from real and virtual Titan flybys |
| title_sort |
dynamics of saturn's magnetodisk near titan's orbit: comparison of cassini magnetometer observations from real and virtual titan flybys |
| publishDate |
2010 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00320633_v58_n12_p1625_Simon http://hdl.handle.net/20.500.12110/paper_00320633_v58_n12_p1625_Simon |
| _version_ |
1768545363680034816 |