CONSERT constrains the internal structure of 67P at a few-metre size scale

Valérie Ciarletti; Alain Herique; Jérémie Lasue; Anny Chantal Levasseur-Regourd; Dirk Plettemeier; Florentin Lemonnier; Christophe Guiffaut; Pierre Pasquero; Wlodek Kofman

CONSERT constrains the internal structure of 67P at a few-metre size scale

Valérie Ciarletti ¹ Alain Herique ² Jérémie Lasue ³ Anny Chantal Levasseur-Regourd ¹ Dirk Plettemeier ⁴ Florentin Lemonnier ¹ Christophe Guiffaut ⁵ Pierre Pasquero ² Wlodek Kofman ²

1 IMPEC - LATMOS

LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales

2 IPAG - Institut de Planétologie et d'Astrophysique de Grenoble

3 IRAP - Institut de recherche en astrophysique et planétologie

4 TUD - Technische Universität Dresden

5 XLIM-SRF - Systèmes RF

XLIM - XLIM : SRF

Abstract : The internal properties of cometary nuclei are the best clues to the size distribution and properties of the early planetesimals that formed the planets during the early solar system nebula processes. The CONSERT radar was designed to probe the interior of comet 67P/Churyumov-Gerasimenko with a wavelength of about 3 meters. It was successfully operated during the First Science Sequence of the Rosetta mission when the CONSERT’s wave propagated through part of the nucleus’ small lobe. The shape of the received signals provides some hints about the internal structure of the comet's small lobe. The limited broadening observed on the received pulses is compared to simulations performed on a series of non-homogeneous nucleus models to put constrains on the potential structures at the wavelength's scale. The study allows to exclude structures showing a permittivity contrast larger than 0.25 inside the sounded part of the nucleus at a few-metre size scale.

Keywords : scattering radar numerical simulation comets 67P/Churyumov–Gerasimenko

Document type :

Journal articles

Domain :

Sciences of the Universe [physics]

Complete list of metadatas

https://hal-insu.archives-ouvertes.fr/insu-01689580
Contributor : Catherine Cardon <>
Submitted on : Monday, January 22, 2018 - 11:40:07 AM
Last modification on : Monday, September 2, 2019 - 2:46:09 PM

CONSERT constrains the internal structure of 67P at a few-metre size scale

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CONSERT constrains the internal structure of 67P at a few-metre size scale

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