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Diurnal variation of dust and gas production in comet 67P/Churyumov-Gerasimenko at the inbound equinox as seen by OSIRIS and VIRTIS-M on board Rosetta

Tubiana, C. and Rinaldi, G. and Güttler, C. and Snodgrass, C. and Shi, X. and Hu, X. and Marschall, R. and Fulle, M. and Bockelee-Morvan, D. and Naletto, G. and Capaccioni, F. and Sierks, H. and Arnold, Gabriele and Barucci, M. A. and Bertaux, J.-L. and Bertini, I. and Bodewits, D. and Capria, M. T. and Ciarniello, M. and Cremonese, G. and Crovisier, J. and Da Deppo, V. and Debei, S. and De Cecco, M. and Deller, J. and De Sanctis, M. C. and Davidsson, B. and Doose, L. and Erard, S. and Filacchione, G. and Fink, U. and Formisano, M. and Fornasier, S and Gutierrez, P. J. and IP, W.-H. and Ivanovski, S. and Kappel, David and Keller, H. U. and Kolokolova, L and Koschny, D. and Krueger, Harald and La Forgia, F and Lamy, P. L and Lara, L. M. and Lazzarin, M. and Levasseur-Regourd, A. C. and Lin, Z.-Y. and Longobardo, A and Lopez-Moreno, J. J. and Marzari, F. and Migliorini, A. and Mottola, Stefano and Rodrigo, R. and Taylor, F. and Toth, I. and Zakharov, V. (2019) Diurnal variation of dust and gas production in comet 67P/Churyumov-Gerasimenko at the inbound equinox as seen by OSIRIS and VIRTIS-M on board Rosetta. Astronomy & Astrophysics, 630, A23. EDP Sciences. doi: 10.1051/0004-6361/201834869. ISSN 0004-6361.

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Official URL: https://www.aanda.org/articles/aa/abs/2019/10/aa34869-18/aa34869-18.html


Context. On 27 April 2015, when comet 67P/Churyumov-Gerasimenko was at 1.76 au from the Sun and moving toward perihelion, the OSIRIS and VIRTIS-M instruments on board the Rosetta spacecraft simultaneously observed the evolving dust and gas coma during a complete rotation of the comet. Aims: We aim to characterize the spatial distribution of dust, H2O, and CO2 gas in the inner coma. To do this, we performed a quantitative analysis of the release of dust and gas and compared the observed H2O production rate with the rate we calculated using a thermophysical model. Methods: For this study we selected OSIRIS WAC images at 612 nm (dust) and VIRTIS-M image cubes at 612 nm, 2700 nm (H2O emission band), and 4200 nm (CO2 emission band). We measured the average signal in a circular annulus to study the spatial variation around the comet, and in a sector of the annulus to study temporal variation in the sunward direction with comet rotation, both at a fixed distance of 3.1 km from the comet center. Results: The spatial correlation between dust and water, both coming from the sunlit side of the comet, shows that water is the main driver of dust activity in this time period. The spatial distribution of CO2 is not correlated with water and dust. There is no strong temporal correlation between the dust brightness and water production rate as the comet rotates. The dust brightness shows a peak at 0° subsolar longitude, which is not pronounced in the water production. At the same epoch, there is also a maximum in CO2 production. An excess of measured water production with respect to the value calculated using a simple thermophysical model is observed when the head lobe and regions of the southern hemisphere with strong seasonal variations are illuminated (subsolar longitude 270°-50°). A drastic decrease in dust production when the water production (both measured and from the model) displays a maximum occurs when typical northern consolidated regions are illuminated and the southern hemisphere regions with strong seasonal variations are instead in shadow (subsolar longitude 50°-90°). Possible explanations of these observations are presented and discussed.

Item URL in elib:https://elib.dlr.de/130768/
Document Type:Article
Title:Diurnal variation of dust and gas production in comet 67P/Churyumov-Gerasimenko at the inbound equinox as seen by OSIRIS and VIRTIS-M on board Rosetta
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Tubiana, C.Max-Planck-Institut für Sonnensystemforschung, Justus-von- Liebig-Weg, 3 37077 Göttingen, GermanyUNSPECIFIED
Rinaldi, G.INAF – Istituto di Fisica dello Spazio Interplanetario, via del Fosso del Cavaliere 100, 00133 Roma, ItalyUNSPECIFIED
Güttler, C.Max-Planck Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077 Göttingen, GermanyUNSPECIFIED
Snodgrass, C.Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ, UKUNSPECIFIED
Shi, X.Max-Planck-Institut für Sonnensystemforschung, Justus-von- Liebig-Weg, 3 37077 Göttingen, GermanyUNSPECIFIED
Hu, X.Institute for Geodesy and Geoinformation Science, Technical University Berlin, Straße des 17. Juni 135, 10623 Berlin, GermanyUNSPECIFIED
Marschall, R.International Space Science Institute, Bern, SwitzerlandUNSPECIFIED
Fulle, M.inaf - osservatorio astronomico di trieste, trieste, italyUNSPECIFIED
Naletto, G.University of Padova, CISAS, via Venezia 15, 35100 Padova, ItalyUNSPECIFIED
Capaccioni, F.INAF-IAPS, Istituto di Astrofisica e Planetologia Spaziali, ItalyUNSPECIFIED
Sierks, H.max-planck-institut für sonnensystemforschung, justus-von-liebig-weg 3, 37077 göttingen, germanyUNSPECIFIED
Arnold, GabrieleGabriele.Arnold (at) dlr.deUNSPECIFIED
Barucci, M. A.LESIA, Obs. de Paris, CNRS, Univ Paris 06, Univ. Paris-Diderot, 5 place J. Janssen, 92195 Meudon, FranceUNSPECIFIED
Bertini, I.AC(University of Padova, Department of AstronomyUNSPECIFIED
Bodewits, D.Physics Department, Auburn University, Auburn, AL 36849, USAUNSPECIFIED
Capria, M. T.instituto di astrofisica spaziale e fisica cosmica, roma, italyUNSPECIFIED
Ciarniello, M.INAF-IAPS, Rome, ItalyUNSPECIFIED
Cremonese, G.INAF – Astronomical Observatory of Padova, Padova, ItalyUNSPECIFIED
Crovisier, J.LESIA, Observatoire de Paris, PSL Research University, FranceUNSPECIFIED
Da Deppo, V.CNR-IFN UOS Padova LUXOR, via Trasea 7, 35131 Padova, ItalyUNSPECIFIED
Debei, S.Engineering Department, Università di Padova, Padova, ItalyUNSPECIFIED
De Cecco, M.UNITN, Università di Trento, via Mesiano, 77, 38100 Trento, ItalyUNSPECIFIED
Deller, J.Max-Planck Institut für Sonnensystemforschung, Goettingen, GermanyUNSPECIFIED
De Sanctis, M. C.inaf, iaps, rome, italyUNSPECIFIED
Davidsson, B.Jet Propulsion Laboratory, M/S 183-401, 4800 Oak Grove Drive, Pasadena, CA 91109, USAUNSPECIFIED
Doose, L.University of ArizonaUNSPECIFIED
Erard, S.LESIA, Observatoire de Paris, Paris, FranceUNSPECIFIED
Filacchione, G.INAF-IAPS Istituto di Astrofisica e Planetologia Spaziali, Rome, ItalyUNSPECIFIED
Fink, U.Lunar Planetary Laboratory, Univarsity of Arizona, Tucson, USAUNSPECIFIED
Formisano, M.Istituto di Astrofisica e Planetologia Spaziali – INAF, via del fosso del cavaliere 100, 00133 Rome, ItalyUNSPECIFIED
Fornasier, SLESIA Observatoire de Paris-Meudon, Meudon, FranceUNSPECIFIED
Gutierrez, P. J.instituto de astrofísica de andalucía – csic, granada, spainUNSPECIFIED
IP, W.-H.Nationa Central Univ., Institute of Astronomy, Chung-Li, TaiwanUNSPECIFIED
Ivanovski, S.Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica (INAF), Via Fosso del Cavaliere, 100, 0133 Rome, ItalyUNSPECIFIED
Kappel, DavidDavid.Kappel (at) dlr.deUNSPECIFIED
Keller, H. U.Institute for Geophysics and Extraterrestrial Physics, TU Braunschweig, 38106, GermanyUNSPECIFIED
Kolokolova, Luniversity of maryland, department of astronomyUNSPECIFIED
Koschny, D.Research and Scientific Support Department, European Space Agency, 2201 Noordwijk, The NetherlandsUNSPECIFIED
La Forgia, FDepartment of Physics and Astronomy “G. Galilei”, University of Padova, Vic. Osservatorio 3, 35122 Padova, ItalyUNSPECIFIED
Lamy, P. LLaboratoire Atmosphères, Milieux et Observations Spatiales, CNRS & Université de Versailles Saint-Quentin-en-Yvelines, 11 boulevard d’Alembert, 78280 Guyancourt, FranceUNSPECIFIED
Lara, L. M.Instituto de Astrofisica de Andalucia, CSIC, Granada, SpainUNSPECIFIED
Lazzarin, M.university of padova, department of physics and astronomy, vicolo dell'osservatorio 3, 35122 padova, italyUNSPECIFIED
Levasseur-Regourd, A. C.LATMOS, Sorbonne University, CNRS, UVSQ, Campus Pierre et Marie Curie, BC 102, 4 place Jussieu, 75005 Paris, FranceUNSPECIFIED
Lin, Z.-Y.National Central University, Jhongli, Taoyuan, TaiwanUNSPECIFIED
Longobardo, Ainaf-laps, via del fosso del cavaliere 100, i-00133 rome, italyUNSPECIFIED
Lopez-Moreno, J. J.IAA–CSIC, Granada, SpainUNSPECIFIED
Marzari, F.dipartimento di fisica e astronomia “g. galilei”, university of padova, vic. osservatorio 3, 35122 padova, italyUNSPECIFIED
Migliorini, A.INAF-IAPS, Istituto di Astrofisica e Planetologia SpazialiUNSPECIFIED
Mottola, StefanoStefano.Mottola (at) dlr.deUNSPECIFIED
Rodrigo, R.Centro de Astrobiología, CSIC-INTA, 28850 Torrejón de Ardoz, Madrid, SpainUNSPECIFIED
Taylor, F.Oxford UniversityUNSPECIFIED
Toth, I.Konkoly Observatory, MTA CSFK CSIUNSPECIFIED
Zakharov, V.Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica, Rome, ItalyUNSPECIFIED
Date:October 2019
Journal or Publication Title:Astronomy & Astrophysics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1051/0004-6361/201834869
Page Range:A23
Publisher:EDP Sciences
Keywords:comets: general; comets: individual: 67P/Churyumov-Gerasimenko; methods: data analysis; Astrophysics - Earth and Planetary Astrophysics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project ROSETTA Instruments
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Asteroids and Comets
Institute of Planetary Research > Leitungsbereich PF
Deposited By: Kappel, David
Deposited On:21 Nov 2019 08:43
Last Modified:21 Nov 2019 08:43

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