OATAO - Open Archive Toulouse Archive Ouverte Open Access Week

Direct Observations of Asteroid Interior and Regolith Structure: Science Measurement Requirements

Herique, Alain and Agnus, Benoit and Asphaug, Erik Ian and Barucci, Maria Antonella and Beck, Pierre and Bellerose, Julie and Biele, Jens and Bonal, Lydie and Bousquet, Pierre and Bruzzone, Lorenzo and Buck, Christopher and Carnelli, Ian and Cheng, Andrew and Ciarletti, Valérie and Delbo, Marco and Du, J. and Du, X. and Eyraud, Christelle and Fa, W. and Gil-Fernandez, Jesus and Gassot, Oriane and Granados-Alfaro, Ricardo and Green, Simon F. and Grieger, B. and Grundmann, Jan Thimo and Grygorczuk, J. and Hahnel, Ronny and Heggy, Essam and Ho, T-M. and Karatekin, Özgür and Kasaba, Y. and Kobayashi, T. and Kofman, Wlodek and Krause, C. and Kumamoto, A. and Küppers, Michael and Laabs, M. and Lange, C. and Lasue, Jeremie and Levasseur-Regourd, Anny Chantal and Mallet, A. and Michel, Patrick and Mottola, Stefano and Murdoch, Naomi and Mütze, Marco and Oberst, Jürgen and Orosei, Roberto and Plettemeier, Dirk and Rochat, Sylvain and Rodriguez-Suquet, Raquel and Rogez, Yves and Schaffer, P. and Snodgrass, Colin and Souyris, Jean-Claude and Tokarz, M. and Ulamec, Stephan and Wahlund, Jan-Erik and Zine, Sonia Direct Observations of Asteroid Interior and Regolith Structure: Science Measurement Requirements. (2018) Advances in Space Research, 62 (8). 2141-2162. ISSN 0273-1177

[img]
Preview
(Document in English)

PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
1MB

Official URL: http://dx.doi.org/10.1016/j.asr.2017.10.020

Abstract

Our knowledge of the internal structure of asteroids is, so far, indirect – relying entirely on inferences from remote sensing observations of the surface, and theoretical modeling of formation and evolution. What are the bulk properties of the regolith and deep interior? And what are the physical processes that shape asteroid internal structures? Is the composition and size distribution observed on the surface representative of the bulk? These questions are crucial to understand small bodies’ history from accretion in the early Solar System to the present, and direct measurements are needed to answer these questions for the benefit of science as well as for planetary defense or exploration. Radar is one of the main instruments capable of sounding asteroids to characterize internal structure from sub-meter to global scale. In this paper, we review the science case for direct observation of the deep internal structure and regolith of a rocky asteroid of kilometer size or smaller. We establish the requirements and model dielectric properties of asteroids to outline a possible instrument suite, and highlight the capabilities of radar instrumentation to achieve these observations. We then review the expected science return including secondary objectives contributing to the determination of the gravitational field, the shape model, and the dynamical state. This work is largely inherited from MarcoPolo-R and AIDA/AIM studies.

Item Type:Article
HAL Id:insu-01624991
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Laboratory name:
Statistics:download
Deposited By: Naomi Murdoch
Deposited On:13 Dec 2017 10:49

Repository Staff Only: item control page