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dc.contributor.author
Sittler Jr., E. C.
dc.contributor.author
Hartle, R. E.
dc.contributor.author
Johnson, R. E.
dc.contributor.author
Cooper, J. F.
dc.contributor.author
Lipatov, A. S.
dc.contributor.author
Bertucci, Cesar
dc.contributor.author
Coates, A. J.
dc.contributor.author
Szego, K.
dc.contributor.author
Shappirio, M.
dc.contributor.author
Simpson, D. G.
dc.contributor.author
Wahlund, J. E.
dc.date.available
2017-06-29T18:48:10Z
dc.date.issued
2010-02
dc.identifier.citation
Sittler Jr., E. C.; Hartle, R. E.; Johnson, R. E.; Cooper, J. F.; Lipatov, A. S.; et al.; Saturn's magnetospheric interaction with Titan as defined by Cassini encounters T9 and T18: New results; Elsevier; Planetary and Space Science; 58; 3; 2-2010; 327-350
dc.identifier.issn
0032-0633
dc.identifier.uri
http://hdl.handle.net/11336/19156
dc.description.abstract
We present new results of Cassini’s T9 flyby with complementary observations from T18. Based on Cassini plasma spectrometer (CAPS) and Cassini magnetometer (MAG), compositional evidence shows the upstream flow for both T9 and T18 appears composed of light ions (H+ and H2 +), with external pressures 30 times lower than that for the earlier TA flyby where heavy ions dominated the magnetospheric plasma. When describing the plasma heating and sputtering of Titan’s atmosphere, T9 and T18 can be considered interactions of low magnetospheric energy input. On the other hand, T5, when heavy ion fluxes are observed to be higher than typical (i.e., TA), represents the limiting case of
high magnetospheric energy input to Titan’s upper atmosphere. Anisotropy estimates of the upstream flow are 1oT?/T:o3 and the flow is perpendicular to B, indicative of local picked up ions from Titan’s H and H2 coronae extending to Titan’s Hill sphere radius. Beyond this distance the corona forms a neutral torus that surrounds Saturn. The T9 flyby unexpectedly resulted in observation of two ‘‘wake’’ crossings referred to as Events 1 and 2. Event 2 was evidently caused by draped magnetosphere field lines, which are scavenging pickup ions from Titan’s induced magnetopause boundary with outward flux 2 106 ions/cm2 /s. The composition of this out flow is dominated by H2 + and H+ ions. Ionospheric flow away from Titan with ion flux 7 106 ion/cm2 /s is observed for Event 1. In between Events 1 and
2 are high energy field aligned flows of magnetosphere protons that may have been accelerated by the convective electric field across Titan’s topside ionosphere. T18 observations are much closer to Titan than T9, allowing one to probe this type of interaction down to altitudes 950 km. Comparisons with previously reported hybrid simulations are made.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Titan
dc.subject
Saturns Magnetosphere
dc.subject
Magnetodisc Plasma
dc.subject
Magnetic Fields
dc.subject.classification
Astronomía
dc.subject.classification
Ciencias Físicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Saturn's magnetospheric interaction with Titan as defined by Cassini encounters T9 and T18: New results
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-06-26T19:48:47Z
dc.journal.volume
58
dc.journal.number
3
dc.journal.pagination
327-350
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Sittler Jr., E. C.. National Aeronautics And Space Administration. Goddart Institute For Space Studies; Estados Unidos
dc.description.fil
Fil: Hartle, R. E.. National Aeronautics And Space Administration. Goddart Institute For Space Studies; Estados Unidos
dc.description.fil
Fil: Johnson, R. E.. University of Virginia; Estados Unidos
dc.description.fil
Fil: Cooper, J. F.. National Aeronautics And Space Administration. Goddart Institute For Space Studies; Estados Unidos
dc.description.fil
Fil: Lipatov, A. S.. National Aeronautics And Space Administration. Goddart Institute For Space Studies; Estados Unidos. University of Maryland; Estados Unidos
dc.description.fil
Fil: Bertucci, Cesar. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
dc.description.fil
Fil: Coates, A. J.. University College London; Estados Unidos
dc.description.fil
Fil: Szego, K.. Research Institute for Particle and Nuclear Physics; Hungría
dc.description.fil
Fil: Shappirio, M.. National Aeronautics And Space Administration. Goddart Institute For Space Studies; Estados Unidos
dc.description.fil
Fil: Simpson, D. G.. National Aeronautics And Space Administration. Goddart Institute For Space Studies; Estados Unidos
dc.description.fil
Fil: Wahlund, J. E.. Swedish Institute of Space Physic; Suecia
dc.journal.title
Planetary and Space Science
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0032063309002815
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.pss.2009.09.017
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