elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

A comparison of multiple Rosetta data sets and 3D model calculations of 67P/Churyumov-Gerasimenko coma around equinox (May 2015)

Marschall, R. and Rezac, L. and Kappel, David and Su, C. C. and Gerig, S.B. and Rubin, M. and Pinzon-Rodriguez, O. and Marshall, D. and Liao, Y. and Herny, C. and Arnold, Gabriele and Christou, C. and Dadzie, S Kokou and Groussin, O and Hartogh, P. and Jorda, L and Kührt, Ekkehard and Mottola, Stefano and Mousis, O. and Preusker, Frank and Scholten, Frank and Theologou, Panagiotis and Wu, J. S. and Altwegg, K. and Rodrigo, R. and Thomas, N. (2019) A comparison of multiple Rosetta data sets and 3D model calculations of 67P/Churyumov-Gerasimenko coma around equinox (May 2015). Icarus, 328, pp. 104-126. Elsevier. DOI: 10.1016/j.icarus.2019.02.008 ISSN 0019-1035

[img] PDF - Registered users only - Published version
6MB

Official URL: https://www.sciencedirect.com/science/article/pii/S0019103518305700

Abstract

We have used the latest available shape model for gas and dust simulations of the inner coma of comet 67P/Churyumov-Gerasimenko for the period around May 2015 (equinox). We compare results from a purely insolation-driven model with a complementary set of observations made by ROSINA, VIRTIS, MIRO, and OSIRIS within the same period. The observations include - for the first time - inverted MIRO measurements of gas density, temperature and bulk velocity to constrain the model. The comparisons show that, as in November 2014 (Marschall et al., 2016), insolation-driven activity does not provide an adequate fit to the data. Both VIRTIS and MIRO observations indicate that emissions from the Hatmehit and Imhotep regions of the nucleus are strongly depleted in total gas, H2O, and dust emissions in this case. The MIRO inversion provides a challenging constraint to the models as a consequence of the terminator orbit and nucleus pointing of the spacecraft. Nonetheless a consistent picture with a dominance of outgassing from the Hapi region, even at equinox, is clearly evident. An inhomogeneous model consistent with models proposed for the November 2014 time-frame was constructed and provides a better fit to the data. As far as we are aware this is the first time comae data from four Rosetta instruments have been used to constrain within one self-contained model the emission distribution at the nucleus surface and study the dynamics of the gas and dust outflow.

Item URL in elib:https://elib.dlr.de/130758/
Document Type:Article
Title:A comparison of multiple Rosetta data sets and 3D model calculations of 67P/Churyumov-Gerasimenko coma around equinox (May 2015)
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Marschall, R.Physics Institute, University of Bern, SwitzerlandUNSPECIFIED
Rezac, L.Max-Planck-Institut für SonnensystemforschungUNSPECIFIED
Kappel, DavidDavid.Kappel (at) dlr.deUNSPECIFIED
Su, C. C.Department of Mechanical Engineering, National Chiao Tung University, TaiwanUNSPECIFIED
Gerig, S.B.Physikalisches Institut, University of Bern, Sidlerstr. 5, CH-3012 Bern, SwitzerlandUNSPECIFIED
Rubin, M.Physikalisches Institut, University of Bern, Sidlerstrasse 5, 3012 Bern, SwitzerlandUNSPECIFIED
Pinzon-Rodriguez, O.Physikalisches Institut, University of Bern, Sidlerstr. 5, CH-3012 Bern, SwitzerlandUNSPECIFIED
Marshall, D.Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3, 37077 Göttingen, GermanyUNSPECIFIED
Liao, Y.Macau University of Science and Technology, MacauUNSPECIFIED
Herny, C.Physikalisches Institut, University of Bern, Sidlerstr. 5, CH-3012 Bern, SwitzerlandUNSPECIFIED
Arnold, GabrieleGabriele.Arnold (at) dlr.deUNSPECIFIED
Christou, C.Heriot-Watt University, Institute of Mechanical Process and Energy Engineering, EH14 4AS, Edinburgh, ScotlandUNSPECIFIED
Dadzie, S KokouHeriot-Watt University, Edinburgh, United KingdomUNSPECIFIED
Groussin, OLaboratoire d'Astrophysique de Marseille, FranceUNSPECIFIED
Hartogh, P.Max-Planck-Institut für Sonnensystemforschung, Katlenburg-LindauUNSPECIFIED
Jorda, LLAM, MarseilleUNSPECIFIED
Kührt, EkkehardEkkehard.Kuehrt (at) dlr.deUNSPECIFIED
Mottola, StefanoStefano.Mottola (at) dlr.deUNSPECIFIED
Mousis, O.LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, Aix Marseille Université, CNRS, F-13388 Marseille, FranceUNSPECIFIED
Preusker, Frankfrank.preusker (at) dlr.deUNSPECIFIED
Scholten, FrankFrank.Scholten (at) dlr.deUNSPECIFIED
Theologou, PanagiotisPhysikalisches Institut, University of Bern, Sidlerstr. 5, CH-3012 Bern, SwitzerlandUNSPECIFIED
Wu, J. S.Department of Mechanical Engineering, National Chiao Tung University, TaiwanUNSPECIFIED
Altwegg, K.Physikalisches Institut, University of Bern, Sidlerstrasse 5, CH-3012 Bern, SwitzerlandUNSPECIFIED
Rodrigo, R.international space science institute, hallerstraße 6, 3012 bern, switzerlandUNSPECIFIED
Thomas, N.Physikalisches Institut der Universität Bern, Sidlerstrasse 5, 3012 Bern, SwitzerlandUNSPECIFIED
Date:August 2019
Journal or Publication Title:Icarus
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:328
DOI :10.1016/j.icarus.2019.02.008
Page Range:pp. 104-126
Publisher:Elsevier
ISSN:0019-1035
Status:Published
Keywords:Comets 67P/Churyumov-Gerasimenko Coma Dust Dynamics
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
Institutes and Institutions:Institute of Planetary Research > Leitungsbereich PF
Institute of Planetary Research > Planetary Geodesy
Institute of Planetary Research > Asteroids and Comets
Deposited By: Kappel, David
Deposited On:25 Nov 2019 14:19
Last Modified:25 Nov 2019 14:19

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.