Titan's highly dynamic magnetic environment: A systematic survey of Cassini magnetometer observations from flybys TAT62
We analyze the variability of the ambient magnetic field near Titan during Cassini encounters TAT62 (October 2004October 2009). Cassini magnetometer (MAG) data show that the moon's magnetic environment is strongly affected by its proximity to Saturn's warped and highly dynamic magnetodisk....
Guardado en:
| Autores principales: | , , , , , , , |
|---|---|
| Formato: | JOUR |
| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00320633_v58_n10_p1230_Simon |
| Aporte de: |
| id |
todo:paper_00320633_v58_n10_p1230_Simon |
|---|---|
| record_format |
dspace |
| spelling |
todo:paper_00320633_v58_n10_p1230_Simon2023-10-03T14:44:43Z Titan's highly dynamic magnetic environment: A systematic survey of Cassini magnetometer observations from flybys TAT62 Simon, S. Wennmacher, A. Neubauer, F.M. Bertucci, C.L. Kriegel, H. Saur, J. Russell, C.T. Dougherty, M.K. 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 Equilibrium positions Flapping motion Magnetic environments Magnetodisk current sheet and lobes Magnetospheric field Numerical models Orbital planes Time-scales Magnetic field effects Magnetic materials Magnetism Magnetometers Magnetosphere Moon Plasma interactions We analyze the variability of the ambient magnetic field near Titan during Cassini encounters TAT62 (October 2004October 2009). Cassini magnetometer (MAG) data show that the moon's magnetic environment is strongly affected by its proximity to Saturn's warped and highly dynamic magnetodisk. In the nightside sector of Saturn's magnetosphere, the magnetic field near Titan is controlled by intense vertical flapping motions of the magnetodisk current sheet, alternately exposing the moon to radially stretched lobe-type fields and to more dipolar, but highly distorted current sheet fields. In southern summer, when most of the Cassini encounters took place, the magnetodisk current sheet was on average located above Titan's orbital plane. However, around equinox in August 2009, the distortions of Titan's magnetic environment due to the rapidly moving current sheet reached a maximum, thus suggesting that the equilibrium position of the sheet at that time was significantly closer to the moon's orbital plane. In the dayside magnetosphere, the formation of the magnetodisk lobes is partially suppressed due to the proximity of the magnetopause. Therefore, during most encounters that took place near noon, Titan was embedded in highly distorted current sheet fields. Within the framework of this study, we not only provide a systematic classification of all Titan flybys between October 2004 and October 2009 as lobe-type or current sheet scenarios, but we also calculate the magnetospheric background field near Titan's orbit whenever possible. Our results show that so far, there is not a single Cassini flyby that matches the frequently applied picture of Titan's plasma interaction from the pre-Cassini era (background field homogeneous, stationary and perpendicular to the moon's orbital plane). The time scales upon which the ambient magnetospheric field close to Titan undergoes significant changes range between only a few minutes and up to several hours. The implications for the development of numerical models for Titan's local plasma interaction are discussed as well. © 2010 Elsevier Ltd. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00320633_v58_n10_p1230_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 Equilibrium positions Flapping motion Magnetic environments Magnetodisk current sheet and lobes Magnetospheric field Numerical models Orbital planes Time-scales Magnetic field effects Magnetic materials Magnetism Magnetometers Magnetosphere Moon Plasma interactions |
| 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 Equilibrium positions Flapping motion Magnetic environments Magnetodisk current sheet and lobes Magnetospheric field Numerical models Orbital planes Time-scales Magnetic field effects Magnetic materials Magnetism Magnetometers Magnetosphere Moon Plasma interactions Simon, S. Wennmacher, A. Neubauer, F.M. Bertucci, C.L. Kriegel, H. Saur, J. Russell, C.T. Dougherty, M.K. Titan's highly dynamic magnetic environment: A systematic survey of Cassini magnetometer observations from flybys TAT62 |
| 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 Equilibrium positions Flapping motion Magnetic environments Magnetodisk current sheet and lobes Magnetospheric field Numerical models Orbital planes Time-scales Magnetic field effects Magnetic materials Magnetism Magnetometers Magnetosphere Moon Plasma interactions |
| description |
We analyze the variability of the ambient magnetic field near Titan during Cassini encounters TAT62 (October 2004October 2009). Cassini magnetometer (MAG) data show that the moon's magnetic environment is strongly affected by its proximity to Saturn's warped and highly dynamic magnetodisk. In the nightside sector of Saturn's magnetosphere, the magnetic field near Titan is controlled by intense vertical flapping motions of the magnetodisk current sheet, alternately exposing the moon to radially stretched lobe-type fields and to more dipolar, but highly distorted current sheet fields. In southern summer, when most of the Cassini encounters took place, the magnetodisk current sheet was on average located above Titan's orbital plane. However, around equinox in August 2009, the distortions of Titan's magnetic environment due to the rapidly moving current sheet reached a maximum, thus suggesting that the equilibrium position of the sheet at that time was significantly closer to the moon's orbital plane. In the dayside magnetosphere, the formation of the magnetodisk lobes is partially suppressed due to the proximity of the magnetopause. Therefore, during most encounters that took place near noon, Titan was embedded in highly distorted current sheet fields. Within the framework of this study, we not only provide a systematic classification of all Titan flybys between October 2004 and October 2009 as lobe-type or current sheet scenarios, but we also calculate the magnetospheric background field near Titan's orbit whenever possible. Our results show that so far, there is not a single Cassini flyby that matches the frequently applied picture of Titan's plasma interaction from the pre-Cassini era (background field homogeneous, stationary and perpendicular to the moon's orbital plane). The time scales upon which the ambient magnetospheric field close to Titan undergoes significant changes range between only a few minutes and up to several hours. The implications for the development of numerical models for Titan's local plasma interaction are discussed as well. © 2010 Elsevier Ltd. |
| format |
JOUR |
| author |
Simon, S. Wennmacher, A. Neubauer, F.M. Bertucci, C.L. Kriegel, H. Saur, J. Russell, C.T. Dougherty, M.K. |
| author_facet |
Simon, S. Wennmacher, A. Neubauer, F.M. Bertucci, C.L. Kriegel, H. Saur, J. Russell, C.T. Dougherty, M.K. |
| author_sort |
Simon, S. |
| title |
Titan's highly dynamic magnetic environment: A systematic survey of Cassini magnetometer observations from flybys TAT62 |
| title_short |
Titan's highly dynamic magnetic environment: A systematic survey of Cassini magnetometer observations from flybys TAT62 |
| title_full |
Titan's highly dynamic magnetic environment: A systematic survey of Cassini magnetometer observations from flybys TAT62 |
| title_fullStr |
Titan's highly dynamic magnetic environment: A systematic survey of Cassini magnetometer observations from flybys TAT62 |
| title_full_unstemmed |
Titan's highly dynamic magnetic environment: A systematic survey of Cassini magnetometer observations from flybys TAT62 |
| title_sort |
titan's highly dynamic magnetic environment: a systematic survey of cassini magnetometer observations from flybys tat62 |
| url |
http://hdl.handle.net/20.500.12110/paper_00320633_v58_n10_p1230_Simon |
| work_keys_str_mv |
AT simons titanshighlydynamicmagneticenvironmentasystematicsurveyofcassinimagnetometerobservationsfromflybystat62 AT wennmachera titanshighlydynamicmagneticenvironmentasystematicsurveyofcassinimagnetometerobservationsfromflybystat62 AT neubauerfm titanshighlydynamicmagneticenvironmentasystematicsurveyofcassinimagnetometerobservationsfromflybystat62 AT bertuccicl titanshighlydynamicmagneticenvironmentasystematicsurveyofcassinimagnetometerobservationsfromflybystat62 AT kriegelh titanshighlydynamicmagneticenvironmentasystematicsurveyofcassinimagnetometerobservationsfromflybystat62 AT saurj titanshighlydynamicmagneticenvironmentasystematicsurveyofcassinimagnetometerobservationsfromflybystat62 AT russellct titanshighlydynamicmagneticenvironmentasystematicsurveyofcassinimagnetometerobservationsfromflybystat62 AT doughertymk titanshighlydynamicmagneticenvironmentasystematicsurveyofcassinimagnetometerobservationsfromflybystat62 |
| _version_ |
1782023776213401600 |