Journal article
A Single Deformed Bow Shock for Titan-Saturn System
Journal of geophysical research. Space physics, Vol.122(11), pp.11,058-11,075
11/2017
DOI: 10.1002/2017JA024672
Abstract
During periods of high solar wind pressure, Saturn’s bow shock is pushed inside Titan’s orbit exposing the moon and its ionosphere to the solar wind. The Cassini spacecraft’s T96 encounter with Titan occurred during such a period and showed evidence for shocks associated with Saturn and Titan. It also revealed the presence of two foreshocks: one prior to the closest approach (foreshock 1) and one after (foreshock 2). Using electromagnetic hybrid (kinetic ions and fluid electrons) simulations and Cassini observations,we showthat the origin of foreshock 1 is tied to the formation of a single deformed bow shock for the Titan-Saturn system. We also report the observations of a structure in foreshock 1 with properties consistent with those of spontaneous hot flow anomalies formed in the simulations and previously observed at Earth, Venus, and Mars. The results of hybrid simulations also show the generation of oblique fast magnetosonic waves upstream of the outbound Titan bow shock in agreement with the observations of large-amplitude magnetosonic pulsations in foreshock 2. We also discuss the implications of a single deformed bow shock for new particle acceleration mechanisms and also Saturn’s magnetopause and magnetosphere.
Details
- Title: Subtitle
- A Single Deformed Bow Shock for Titan-Saturn System
- Creators
- N. Omidi - NOVA ScientificAh Sulaiman - University of IowaW. Kurth - University of IowaH. Madanian - University of KansasT. Cravens - University of KansasN. Sergis - Academy of AthensMk Dougherty - Imperial College LondonNjt Edberg
- Resource Type
- Journal article
- Publication Details
- Journal of geophysical research. Space physics, Vol.122(11), pp.11,058-11,075
- Publisher
- American Geophysical Union
- DOI
- 10.1002/2017JA024672
- ISSN
- 2169-9380
- eISSN
- 2169-9402
- Grant note
- DOI: 10.13039/501100001859, name: Swedish National Space Board, award: 135/13; DOI: 10.13039/501100004359, name: Vetenskapsrådet, award: 621‐2013‐4191
- Language
- English
- Date published
- 11/2017
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984455265802771
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