SARIM PLUS—sample return of comet 67P/CG and of interstellar matter

Srama, R.; Krüger, Harald; Yamaguchi, T.; Stephan, T.; Burchell, M. J.; Kearsley, A. T.; Sterken, Veerle; Postberg, F.; Kempf, S.; Grün, E.; Altobelli, Nicolás; Ehrenfreund, P.; Dikarev, Valeri; Horányi, M.; Sternovsky, Z.; Westphal, A. J.; Gainsforth, Z.; Krabbe, A.; Agarwal, Jessica; Yano, Hajime; Blum, Jürgen; Henkel, H.; Hillier, Jon K.; Hoppe, P.; Trieloff, M.; Hsu, Sean; Mocker, A.; Fiege, K.; Green, Simon; Bischoff, A.; Esposito, F.; Laufer, René; Hyde, Truell; Herdrich, Georg; Fasoulas, Stefanos; Jäckel, A.; Jones, G. H.; Jenniskens, Peter; Khalisi, Emil; Moragas-Klostermeyer, G.; Spahn, F.; Keller, H. U.; Frisch, P. C.; Levasseur-Regourd, A. C.; Pailer, N.; Altwegg, Kathrin; Engrand, C.; Auer, S.; Silén, J.; Sasaki, Satoshi; Kobayashi, Masanori; Schmidt, Jürgen; Kissel, J.; Marty, Bernard; Michel, Patrick; Palumbo, P.; Вайсберг, О. Л.; Baggaley, J.; Rotundi, A.; Röser, Hans‐Peter

doi:10.1007/s10686-011-9285-7

Cited by 3 publications

(2 citation statements)

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“…Dedicated sample return missions like Stardust 2 or SARIM (Srama et al. , ) equipped with active cosmic dust collectors will open new avenues in interplanetary and interstellar dust research.…”

Section: Discussionmentioning

confidence: 99%

Stardust Interstellar Preliminary Examination X: Impact speeds and directions of interstellar grains on the Stardust dust collector

Sterken¹,

Westphal²,

Altobelli³

et al. 2014

Meteorit & Planetary Scien

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Abstract-On the basis of an interstellar dust model compatible with Ulysses and Galileo observations, we calculate and predict the trajectories of interstellar dust (ISD) in the solar system and the distribution of the impact speeds, directions, and flux of ISD particles on the Stardust Interstellar Dust Collector during the two collection periods of the mission. We find that the expected impact velocities are generally low (<10 km s À1 ) for particles with the ratio of the solar radiation pressure force to the solar gravitational force b > 1, and that some of the particles will impact on the cometary side of the collector. If we assume astronomical silicates for particle material and a density of 2 g cm À3 , and use the Ulysses measurements and the ISD trajectory simulations, we conclude that the total number of (detectable) captured ISD particles may be on the order of 50. In companion papers in this volume, we report the discovery of three interstellar dust candidates in the Stardust aerogel tiles. The impact directions and speeds of these candidates are consistent with those calculated from our ISD propagation model, within the uncertainties of the model and of the observations.

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Section: Discussionmentioning

confidence: 99%

Stardust Interstellar Preliminary Examination X: Impact speeds and directions of interstellar grains on the Stardust dust collector

Sterken¹,

Westphal²,

Altobelli³

et al. 2014

Meteorit & Planetary Scien

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“…Measurements of the ISD flux along the orbits of asteroids, Mars or Jupiter are very well suited to characterizing the ISD dynamics, size distribution, and grain composition with time. Suited space missions were proposed to ESA, such as DUNEeXpress (Srama et al 2006), SARIM (Srama et al 2009), or SARIM PLUS (Srama et al 2012). Cassini will use the opportunity to continue ISD measurements at Saturn in the remaining years of the tour.…”

Section: Discussionmentioning

confidence: 99%

The filtering of interstellar dust in the solar system

Sterken

Altobelli

Kempf

et al. 2013

A&A

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Context. Theoretical predictions demonstrate that small (<0.1 µm) interstellar grains are mostly excluded from reaching the planetary system by electromagnetic interactions in the heliopause region and in the inner heliosphere. Bigger interstellar grains have been recorded in the planetary system by dust measurements on board Ulysses and other spacecraft. It was found that the interstellar dust flux is modulated by the interplanetary magnetic field. Aims. The objective of this study is to analyze the heliospheric filtering of the interstellar dust flow through the solar system and throughout the solar cycle. In the heliosphere the dynamics of interstellar dust is governed by the gravitational pull of the Sun, by the repulsion of solar radiation, and by the deflection caused by the interaction of the charged interstellar dust (ISD) grains with the interplanetary magnetic field. These interactions are described by the parameters of the radiation pressure constant β and the charge-to-mass ratio Q/m, which depend on the particle's size, physical properties, and composition. A previous paper studied the flow characteristics of ISD moving through the solar system were studied. In this follow-up paper, we focus on how the ISD size distribution varies during its passage through the solar system. Methods. In a parametric study of 70 different β and Q/m values, we calculated interstellar dust trajectories starting at the boundary of the heliosphere with starting times spread over a complete solar cycle of 22 years. Results. As a result we obtained the interstellar dust flux and dust speed for these times and positions and demonstrate the effects of the filtering on the dust size distributions. The size distribution of ISD observed at any time and at any position in the planetary system is strongly modified from when it entered the heliosphere. Peaks in relative flux of 10 times the original flux possibly depend on the grain size and place and time in the solar system. We did a detailed study of three cases of the flux and size distribution of interstellar grains reaching the planets Saturn, Jupiter, and the main-belt asteroid Ceres. These cases are used to get a first idea of what a dust detector or collector on a mission to these bodies might see of ISD.

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Conclusions and Outlook

2014

Comets and Their Origin

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SARIM PLUS—sample return of comet 67P/CG and of interstellar matter

Abstract: The Stardust mission returned cometary, interplanetary and (probably) interstellar dust in 2006 to Earth that have been analysed in Earth laboratories worldwide. Results of this mission have changed our view and R. Srama (B)

Cited by 3 publications

References 52 publications

Stardust Interstellar Preliminary Examination X: Impact speeds and directions of interstellar grains on the Stardust dust collector

Stardust Interstellar Preliminary Examination X: Impact speeds and directions of interstellar grains on the Stardust dust collector

The filtering of interstellar dust in the solar system

Conclusions and Outlook

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