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Dust Impact Monitor (SESAME-DIM) Measurements at Comet 67P/Churyumov-Gerasimenko

Krüger, Harald and Seidensticker, Klaus J. and Fischer, Hans-Herbert and Albin, Thomas and Apathy, Istvan and Arnold, Walter and Flandes, Alberto and Hirn, Attila and Kobayashi, Masanori and Loose, Alexander and Péter, Attila and Podolak, Morris (2015) Dust Impact Monitor (SESAME-DIM) Measurements at Comet 67P/Churyumov-Gerasimenko. Astronomy & Astrophysics, 583, A15(1)-A15(13). EDP Sciences. DOI: 10.1051/0004-6361/201526400 ISSN 0004-6361

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Abstract

Context. The Rosetta lander Philae successfully landed on the nucleus of comet 67P/Churyumov-Gerasimenko on 12 November 2014. Philae carries the Dust Impact Monitor (DIM) on board, which is part of the Surface Electric Sounding and Acoustic Monitoring Experiment (SESAME). DIM employs piezoelectric PZT sensors to detect impacts by submillimeter- and millimeter-sized ice and dust particles that are emitted from the nucleus and transported into the cometary coma. Aims. The DIM sensor measures dynamical data such as flux and the directionality of the impacting particles. Mass and speed of the particles can be constrained assuming density and elastic particle properties. Methods. DIM was operated during three mission phases of Philae at the comet: (1) Before the separation of Philae from Rosetta at distances of about 9.6 km, 11.8 km, and 25.3 km from the nucleus barycenter. In this mission phase particles released from the nucleus on radial trajectories remained undetectable because of significant obscuration by the structures of Rosetta, and no dust particles were indeed detected; (2) during Philae’s descent to its nominal landing site Agilkia, DIM detected one approximately millimeter-sized particle at a distance of 5.0 km from the nucleus’ barycenter, corresponding to an altitude of 2.4 km from the surface. This is the closest ever dust detection at a cometary nucleus by a dedicated in situ dust detector; and (3) at Philae’s final landing site, Abydos, DIM detected no dust impact which may be due to low cometary activity in the vicinity of Philae or due to shading by obstacles close to Philae, or both. Results. Laboratory calibration experiments showed that the material properties of the detected particle are compatible with a porous particle having a bulk density of approximately 250 kgm

Item URL in elib:https://elib.dlr.de/98516/
Document Type:Article
Title:Dust Impact Monitor (SESAME-DIM) Measurements at Comet 67P/Churyumov-Gerasimenko
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Krüger, HaraldMPS, GöttingenUNSPECIFIED
Seidensticker, Klaus J.Klaus.Seidensticker (at) dlr.deUNSPECIFIED
Fischer, Hans-Herberthans-herbert.fischer (at) dlr.deUNSPECIFIED
Albin, ThomasMPS, Göttingen, GermanyUNSPECIFIED
Apathy, IstvanMTA, Budapest, UngarnUNSPECIFIED
Arnold, WalterUniv. Saarbrücken, Univ. GöttingenUNSPECIFIED
Flandes, AlbertoUNAM, MexikoUNSPECIFIED
Hirn, AttilaMTA Center for Energy Research, Budapest, UngarnUNSPECIFIED
Kobayashi, MasanoriChiba Institute of Technology, JapanUNSPECIFIED
Loose, AlexanderMPS, Göttingen, GermanyUNSPECIFIED
Péter, AttilaMTA, Budapest, UngarnUNSPECIFIED
Podolak, MorrisTel Aviv University, IsraelUNSPECIFIED
Date:30 October 2015
Journal or Publication Title:Astronomy & Astrophysics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:583
DOI :10.1051/0004-6361/201526400
Page Range:A15(1)-A15(13)
Publisher:EDP Sciences
ISSN:0004-6361
Status:Published
Keywords:Rosetta, comets, cosmic dust, cometary dust, piezoelectric detectors, 67P/Churyumov-Gerasimenko, SESAME
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt ROSETTA Instrumente
Location: Berlin-Adlershof , Köln-Porz
Institutes and Institutions:Institute of Planetary Research > Asteroids and Comets
Space Operations and Astronaut Training > User center for space experiments (MUSC)
Deposited By: Seidensticker, Dr. Klaus J.
Deposited On:09 Nov 2015 17:26
Last Modified:31 Jul 2019 19:55

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