Long-term monitoring of comet 67P/Churyumov-Gerasimenko’s jets with OSIRIS onboard Rosetta

M. I. Schmitt 1 Cécilia Tubiana 1 Carsten Güttler 1 Holger Sierks 1 Jean-Baptiste Vincent 2 Mohamed Ramy El-Maarry 3 Dennis Bodewits 4 Stefano Mottola 2 Sonia Fornasier 5 Marc Hofmann 1 Ceasre Barbieri 6 Philippe L. Lamy 7 Rafael Rodrigo 8, 9 Detlef Koschny 10 Hans Rickman 11, 12 Michael F. A’hearn 4 Jessica Agarwal 1 Maria Antonella Barucci 5 Jean-Loup Bertaux 13 Ivano Bertini 14 Gabriele Cremonese 15 Vania Da Deppo 16 Björn Davidsson 17 Stefano Debei 18 Mariolino de Cecco 19 Jakob Deller 1 Marco Fulle 20 Adeline Gicquel 17 Olivier Groussin 7 Pedro J. Gutiérrez 21 Stubbe F. Hviid 2 Wing-Huen Ip 22, 23 Laurent Jorda 7 Horst Uwe Keller 2, 24 Jörg Knollenberg 2 J. Rainer Kramm 1 Ekkehard Kührt 2 Michael Küppers 25 Luisa M. Lara 21 Monica Lazzarin 6 José J. López-Moreno 21 Francesco Marzari 6 Giampiero Naletto 26, 14, 16 Nilda Oklay 2 Maurizio Pajola 27 Deshapriya Prasanna 5 Xian Shi 1 Frank Scholten 2 Imre Toth 28, 7 Nicolas Thomas 29, 30
Abstract : We used the OSIRIS camera system onboard the Rosetta spacecraft to monitor jet activity of comet 67P/Churyumov-Gerasimenko. With a monthly cadence, we covered an epoch from December 2014 to October 2015, thereby including the first equinox and the perihelion passage. Jet features were measured in individual images, which were used to perform a statistical inversion. The study provides maps for the locations of likeliest sources of jet activity on the comet’s surface as a function of time. The sources follow the sub-solar latitude, show clustering and a broadening of the activity band with time in the Northern hemisphere. On the Southern hemisphere they are not clustered but show a broader spread over all longitudes which is either related to the north-south dichotomy of the comet’s topography or due to a higher insolation during southern summer.
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Submitted on : Wednesday, August 16, 2017 - 10:57:12 AM
Last modification on : Wednesday, May 15, 2019 - 4:00:23 AM

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M. I. Schmitt, Cécilia Tubiana, Carsten Güttler, Holger Sierks, Jean-Baptiste Vincent, et al.. Long-term monitoring of comet 67P/Churyumov-Gerasimenko’s jets with OSIRIS onboard Rosetta. Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P - Oxford Open Option A, 2017, 469 (Suppl_2), pp.S380-S385. ⟨10.1093/mnras/stx1780⟩. ⟨insu-01574684⟩

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