Spin and activity of comet 67P/Churyumov-Gerasimenko

Aims. In 2014 ESA's spacecraft Rosetta will reach its final target: comet 67P/Churyumov-Gerasimenko (67P). Although this comet has been studied in great detail over the past decade, there are still some uncertainties regarding the actual spin orientation and the distribution of active regions o...

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Autores: Vincent, J.B., Lara, Luisa María, Tozzi, G. P., Lin, Z. -Y., Sierks, H.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2013
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/405137
Acceso en línea:http://hdl.handle.net/10261/405137
Access Level:acceso abierto
Palabra clave:Comets: general
Comets: individual: 67P/Churyumov- Gerasimenko
Methods: numerical
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spelling Spin and activity of comet 67P/Churyumov-GerasimenkoVincent, J.B.Lara, Luisa MaríaTozzi, G. P.Lin, Z. -Y.Sierks, H.Comets: generalComets: individual: 67P/Churyumov- GerasimenkoMethods: numericalAims. In 2014 ESA's spacecraft Rosetta will reach its final target: comet 67P/Churyumov-Gerasimenko (67P). Although this comet has been studied in great detail over the past decade, there are still some uncertainties regarding the actual spin orientation and the distribution of active regions on the surface. We here give an overview of our current knowledge of these critical parameters based mainly on data acquired during the last orbit of the comet aims to deliver a review of what is our current knowledge of these critical parameters. Methods. We based our analysis on the modeling and interpretation of dust jets seen in the coma of 67P during the 2009 apparition. Results. The inversion of ground-based images leads to an estimate of the spin axis orientation (RA = 40 ± 10, Dec = 70 ± 10) and to the localization of the most prominent active areas on the surface of the nucleus. We can reproduce the activity with three active regions localized at-45, 0, and +60 of latitude. We use these results to revisit the observations taken during the 2003 apparition and examine the changes in activity between then and now. Our model from 2009 is also valid for the 2003 data, which suggests that no significant change in spin orientation and active areas occurred from one perihelion passage to the next. Finally, we combine all the results to propose some predictions on the activity to be expected in 2015 during the comet exploration phase of the Rosetta mission. © 2013 ESO.Jean-Baptiste Vincent thanks Hermann Böhnhardt for his help on the data analysis and the final review of the paper. L. M. Lara’s work has been funded by the research project AyA 2009-08011 awarded by the Spanish Ministerio de Ciencia e Innovacion. This research has made use of NASA’s Astrophysics Data System Bibliographic Services.Peer reviewedEDP SciencesMinisterio de Ciencia e Innovación (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252013info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/405137reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MCINN//AYA2009-08011http://dx.doi.org/10.1051/0004-6361/201219350Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4051372026-05-22T06:33:51Z
dc.title.none.fl_str_mv Spin and activity of comet 67P/Churyumov-Gerasimenko
title Spin and activity of comet 67P/Churyumov-Gerasimenko
spellingShingle Spin and activity of comet 67P/Churyumov-Gerasimenko
Vincent, J.B.
Comets: general
Comets: individual: 67P/Churyumov- Gerasimenko
Methods: numerical
title_short Spin and activity of comet 67P/Churyumov-Gerasimenko
title_full Spin and activity of comet 67P/Churyumov-Gerasimenko
title_fullStr Spin and activity of comet 67P/Churyumov-Gerasimenko
title_full_unstemmed Spin and activity of comet 67P/Churyumov-Gerasimenko
title_sort Spin and activity of comet 67P/Churyumov-Gerasimenko
dc.creator.none.fl_str_mv Vincent, J.B.
Lara, Luisa María
Tozzi, G. P.
Lin, Z. -Y.
Sierks, H.
author Vincent, J.B.
author_facet Vincent, J.B.
Lara, Luisa María
Tozzi, G. P.
Lin, Z. -Y.
Sierks, H.
author_role author
author2 Lara, Luisa María
Tozzi, G. P.
Lin, Z. -Y.
Sierks, H.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Comets: general
Comets: individual: 67P/Churyumov- Gerasimenko
Methods: numerical
topic Comets: general
Comets: individual: 67P/Churyumov- Gerasimenko
Methods: numerical
description Aims. In 2014 ESA's spacecraft Rosetta will reach its final target: comet 67P/Churyumov-Gerasimenko (67P). Although this comet has been studied in great detail over the past decade, there are still some uncertainties regarding the actual spin orientation and the distribution of active regions on the surface. We here give an overview of our current knowledge of these critical parameters based mainly on data acquired during the last orbit of the comet aims to deliver a review of what is our current knowledge of these critical parameters. Methods. We based our analysis on the modeling and interpretation of dust jets seen in the coma of 67P during the 2009 apparition. Results. The inversion of ground-based images leads to an estimate of the spin axis orientation (RA = 40 ± 10, Dec = 70 ± 10) and to the localization of the most prominent active areas on the surface of the nucleus. We can reproduce the activity with three active regions localized at-45, 0, and +60 of latitude. We use these results to revisit the observations taken during the 2003 apparition and examine the changes in activity between then and now. Our model from 2009 is also valid for the 2003 data, which suggests that no significant change in spin orientation and active areas occurred from one perihelion passage to the next. Finally, we combine all the results to propose some predictions on the activity to be expected in 2015 during the comet exploration phase of the Rosetta mission. © 2013 ESO.
publishDate 2013
dc.date.none.fl_str_mv 2013
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
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dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/405137
url http://hdl.handle.net/10261/405137
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MCINN//AYA2009-08011
http://dx.doi.org/10.1051/0004-6361/201219350
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
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