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Summer outbursts in the coma of comet 67P/Churyumov-Gerasimenko as observed by Rosetta-VIRTIS

Rinaldi, G. and Bockelee-Morvan, D. and Ciarniello, M. and Tozzi, G. and Capaccioni, F. and Ivanovski, S. and Filacchione, G. and Fink, U. and Doose, L. and Taylor, F.W. and Kappel, David and Erard, S. and Leyrat, C. and Raponi, A. and D'Aversa, E. and Capria, M. T. and Longobardo, A and Palomba, E. and Tosi, F. and Migliorini, A. and Rotundi, A. and Della Corte, Vincenzo and Salatti, M. (2018) Summer outbursts in the coma of comet 67P/Churyumov-Gerasimenko as observed by Rosetta-VIRTIS. Monthly Notices of the Royal Astronomical Society, 481 (1), pp. 1235-1250. Oxford University Press. DOI: 10.1093/mnras/sty2266 ISSN 0035-8711

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Official URL: https://academic.oup.com/mnras/article/481/1/1235/5076069

Abstract

We present an analysis of transient events observed by the Visible InfraRed Thermal Imaging Spectrometer, instrument aboard Rosetta, for the dates of 2015 August 10, September 13 and 14, during the two months surrounding the comet perihelion passage of the Rosetta spacecraft. We detected and characterized events with life-times ranging from 26 min down to 6 min. The temporal evolution of the outburst shows a sudden increase of radiance from quiescent coma to the maximum in a few minutes. This rapid onset is correlated with a change of the visible dust colour from red, 15-18+-3 per cent/100 nm, to bluer with values of 7-10+-0.3 per cent/100 nm. The dust morphology of these outbursts can be classified into two main types: narrow and collimated plumes (August 10, September 13) and broad blobs (September 14). The observations suggest that there are localized regions on the surface that are more prone to outbursts than the rest of the nucleus. The projected dust velocity during the outburst events ranges between 22.2 +- 2.2 m s-1 and 64.9 +- 10.6 m s-1. The total ejected mass during an outburst event is estimated to be between 10 and 500 tons for a duration of 6-26 min assuming size distribution indices between -2.5 and -3.

Item URL in elib:https://elib.dlr.de/124868/
Document Type:Article
Title:Summer outbursts in the coma of comet 67P/Churyumov-Gerasimenko as observed by Rosetta-VIRTIS
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Rinaldi, G.Istituto di Fisica dello Spazio Interplanetario (IFSI-INAF), Rome - ItalyUNSPECIFIED
Bockelee-Morvan, D.Observatoire de Paris, MeudonUNSPECIFIED
Ciarniello, M.INAF-IASF, ItalyUNSPECIFIED
Tozzi, G.Osservatorio Astrofisico di Arcetri, Firenze, ItalyUNSPECIFIED
Capaccioni, F.INAF-IASF, italyUNSPECIFIED
Ivanovski, S.Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica (INAF), Via Fosso del Cavaliere, 100, 0133 Rome, ItalyUNSPECIFIED
Filacchione, G.INAF-IASF, Rome, ItalyUNSPECIFIED
Fink, U.Lunar Planetary Laboratory, Univarsity of Arizona, Tucson, USAUNSPECIFIED
Doose, L.University of ArizonaUNSPECIFIED
Taylor, F.W.University of OxfordUNSPECIFIED
Kappel, DavidDavid.Kappel (at) dlr.dehttps://orcid.org/0000-0002-0518-5548
Erard, S.LESIAUNSPECIFIED
Leyrat, C.LESIAUNSPECIFIED
Raponi, A.INAF-IASF, ItalyUNSPECIFIED
D'Aversa, E.INAF-IFSI, Rome, ItalyUNSPECIFIED
Capria, M. T.Instituto di Astrofisica Spaziale e Fisica Cosmica, Roma, ItalyUNSPECIFIED
Longobardo, AINAF-LAPS, Via del Fosso del Cavaliere 100, I-00133 Rome, ItalyUNSPECIFIED
Palomba, E.Institute for Interplanetary Space Physics - INAF, Rome, ItalyUNSPECIFIED
Tosi, F.INAF-IASF Istituto di Astrofisica Spaziale e Fisica Cosmica, Roma ItalyUNSPECIFIED
Migliorini, A.INAF-IASFUNSPECIFIED
Rotundi, A.INAF - Istituto di Astrofisica e Planetologia Spaziali, Area Ricerca Tor Vergata, Via Fosso del Cavaliere 100, 00133 Rome, ItalyUNSPECIFIED
Della Corte, VincenzoINAF-IAPS, Roma, ItalyUNSPECIFIED
Salatti, M.ASI RomUNSPECIFIED
Date:18 August 2018
Journal or Publication Title:Monthly Notices of the Royal Astronomical Society
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:481
DOI :10.1093/mnras/sty2266
Page Range:pp. 1235-1250
Publisher:Oxford University Press
Series Name:Monthly Notices of the Royal Astronomical Society
ISSN:0035-8711
Status:Published
Keywords:methods: data analysis, methods:observational, space vehicles: instruments, techniques: imaging spectroscopy, comets: individual: 67P/Churyumov-Gerasimenko
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
Deposited By: Kappel, David
Deposited On:12 Dec 2018 10:55
Last Modified:31 Jul 2019 20:22

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