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
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 : Thursday, February 20, 2020 - 4:28:08 PM

Links full text

openaccess

Identifiers

Collections

INSU | UNILIM | XLIM | XLIM-SRF | CNRS | OSUG | OMP-IRAP | LATMOS | UPMC | IPAG | UVSQ | OMP | UGA | UNIV-PARIS-SACLAY | SORBONNE-UNIVERSITE | UNIV-TLSE3 | SU-SCIENCES | IRSTEA | UNIV-SAVOIE

Citation

Valérie Ciarletti, Alain Herique, Jérémie Lasue, Anny Chantal Levasseur-Regourd, Dirk Plettemeier, et al.. CONSERT constrains the internal structure of 67P at a few-metre size scale. Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P - Oxford Open Option A, 2017, 469 (Suppl_2), pp.S805-S817. ⟨10.1093/mnras/stx3132⟩. ⟨insu-01689580⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

380

Contact

Informations

CCSD