Association of the jets of Enceladus with the warmest regions on its south-polar fractures

Spitale, J. N.; Porco, C. C.

doi:10.1038/nature06217

Cited by 158 publications

(196 citation statements)

References 7 publications

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“…Preliminary triangulation of jets as viewed at different times between 2005 and 2007 and with different viewing geometries in Cassini ISS images have pinpointed the locations of eight major eruptions of material and found all of them on the south polar Tiger Stripes fractures. Four of them are coincident with the hotspots reported in 2006 by (IRS (Spitale and Porco, 2007), While published ISS observations of jets suggest that individual eruption sites stay active on the timescale of years, any shorter temporal variability (on timescales of an orbital period, or 1.3 Earth days, for example) is more difficult to establish because of the spotty temporal coverage and the difficulty of visually isolating one jet from the forest of many seen in a typical image. Consequently, it is not known whether any individual jet is continuously Published by Elsevier Inc.…”

Section: Introductionmentioning

confidence: 52%

“…These observations imply continual activity, but not necessarily that any individual jet remains constantly active. In fact, Spitale and Porco (2007) note that Source I is not visible in observation J( even though the viewing geometIY should be favorable for its detection, Even though image resolution for obselvation J( may limit the ability to detect activity from Source I, in general, the activity of an individual jet source may be variable. Here we consider whether periodic variation of tidal stress might influence the timing of jet activity, In order to address this question, the observations must be placed into the context of Enceladus' orbit.…”

Section: Observations Of Jets From Enceladusmentioning

confidence: 99%

“…The location of jets originating from the south polar region of Enceladus were determined by Spitale anp Porco (2007) Spitale and Porco (2007), showing the sources identified with each observation.…”

Section: Observations Of Jets From Enceladusmentioning

confidence: 99%

“…In this paper, we first summarize the early observations of jet activity as presented by Spitale and Porco (2007) and place those observations into Encealdus' orbital context. Then using the techniques outlined by Hurford et al (2007aHurford et al ( , 2009a, we examine the stresses on the Tiger Stripe regions to see how well diurnal tidal stress caused by Enceladus' orbital eccentricity correlates with the observed eruptions.…”

Section: Introductionmentioning

confidence: 99%

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Tidal control of jet eruptions on Enceladus as observed by Cassini ISS between 2005 and 2007

Hurford¹,

Helfenstein²,

Spitale³

2012

Icarus

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Section: Introductionmentioning

confidence: 52%

Section: Observations Of Jets From Enceladusmentioning

confidence: 99%

Section: Observations Of Jets From Enceladusmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Tidal control of jet eruptions on Enceladus as observed by Cassini ISS between 2005 and 2007

Hurford¹,

Helfenstein²,

Spitale³

2012

Icarus

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“…These data, combined with estimates of the ice shell thickness and tidal fluctuations, and supplemented with high resolution imaging of the icy particle jets and plume-will help determine the origin and locales of energy dissipation on Enceladus and the heat transfer mechanism [33,43]. Temporal monitoring of the icy particle jets over time through repeated high resolution imaging will ascertain if the jetting activity is associated with tidal flexing [17,44].…”

Section: Interior and Early Evolutionmentioning

confidence: 99%

TandEM: Titan and Enceladus mission

et al. 2008

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International audienceTandEM was proposed as an L-class (large) mission in response to ESA's Cosmic Vision 2015-2025 Call, and accepted for further studies, with the goal of exploring Titan and Enceladus. The mission concept is to perform in situ investigations of two worlds tied together by location and properties, whose remarkable natures have been partly revealed by the ongoing Cassini-Huygens mission. These bodies still hold mysteries requiring a complete exploration using a variety of vehicles and instruments. TandEM is an ambitious mission because its targets are two of the most exciting and challenging bodies in the Solar System. It is designed to build on but exceed the scientific and technological accomplishments of the Cassini-Huygens mission, exploring Titan and Enceladus in ways that are not currently possible (full close-up and in situ coverage over long periods of time). In the current mission architecture, TandEM proposes to deliver two medium-sized spacecraft to the Saturnian system. One spacecraft would be an orbiter with a large host of instruments which would perform several Enceladus flybys and deliver penetrators to its surface before going into a dedicated orbit around Titan alone, while the other spacecraft would carry the Titan in situ investigation components, i.e. a hot-air balloon (Montgolfière) and possibly several landing probes to be delivered through the atmospher

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Ion densities and magnetic signatures of dust pickup at Enceladus

et al. 2014

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Encedalus' plume of charged dust has been shown to strongly modify the plasma structures.Therefore, we analyze the magnetic signatures of dust to constrain the dust plume. For the first time, the mutual feedback between the nanograins and their plasma environment is investigated. Our model combines plasma simulations by means of the A.I.K.E.F. (Adaptive Ion-Kinetic Electron-Fluid) code with Monte Carlo simulations of the 3-D profiles of the gas and dust plumes. Data from several instruments of Cassini are considered: the neutral plume model is in good agreement with INMS data, whereas theoretical predictions of the peak ion density are compared against CAPS data, and properties of the dust are obtained by comparing our results with MAG data from the recent E14-E19 flybys. Our main results are (1) due to the ion-neutral chemistry, H 3 O+ is the predominant ion species within the plume; (2) the high nanograin densities observed by CAPS require an increased effective ionization frequency to fulfill quasi-neutrality; (3) the nanograin pickup current makes only a minor contribution to the current systems; i.e., the major contribution of the dust arises from electron absorption; (4) the pickup of nanograins is clearly visible in the magnetic field signatures, even including the distant encounter E15; (5) MAG data indicate a southward extension of the charged dust plume of at least 4 Enceladus radii; (6) the modification of the currents by the nanograins is responsible for the surprising fact that Cassini did not detect a region with a reduced magnetic field strength.

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Association of the jets of Enceladus with the warmest regions on its south-polar fractures

Cited by 158 publications

References 7 publications

Tidal control of jet eruptions on Enceladus as observed by Cassini ISS between 2005 and 2007

Tidal control of jet eruptions on Enceladus as observed by Cassini ISS between 2005 and 2007

TandEM: Titan and Enceladus mission

Ion densities and magnetic signatures of dust pickup at Enceladus

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