The phase function and density of the dust observed at comet 67P/Churyumov-Gerasimenko

Fulle, M.; Bertini, I.; Della Corte, V.; Güttler, C.; Ivanovski, S.; La Forgia, F.; Lasue, J.; Levasseur-Regourd, A. C.; Marzari, F.; Moreno, Fernando; Mottola, S.; Naletto, G.; Palumbo, P.; Rinaldi, G.; Rotundi, A.; Sierks, H.; Barbieri, C.; Lamy, P.L.; Rodrigo Montero, Rafael; Koschny, D.; Rickman, H.; Barucci, M.A.; Bertaux, J.L.; Bodewits, D.; Cremonese, G.; Da Deppo, Vania; Davidsson, B.; Debei, S.; De Cecco, M.; Deller, J.; Fornasier, S.; Groussin, O.; Gutiérrez, Pedro J.; Hviid, H.S.; Ip, W. H.; Jorda, L.; Keller, H.U.; Knollenberg, J.; Kramm, J.R.; Kührt, E.; Küppers, M.; Lara, Luisa María; Lazzarin, M.; López-Moreno, José Juan; Shi, X.; Thomas, N.; Tubiana, C.

The phase function and density of the dust observed at comet 67P/Churyumov-Gerasimenko

The OSIRIS camera onboard Rosetta measured the phase function of both the coma dust and the nucleus. The two functions have a very different slope versus the phase angle. Here, we show that the nucleus phase function should be adopted to convert the brightness to the size of dust particles larger th...

Descripción completa

Detalles Bibliográficos
Autores:	Fulle, M., Bertini, I., Della Corte, V., Güttler, C., Ivanovski, S., La Forgia, F., Lasue, J., Levasseur-Regourd, A. C., Marzari, F., Moreno, Fernando, Mottola, S., Naletto, G., Palumbo, P., Rinaldi, G., Rotundi, A., Sierks, H., Barbieri, C., Lamy, P.L., Rodrigo Montero, Rafael, Koschny, D., Rickman, H., Barucci, M.A., Bertaux, J.L., Bodewits, D., Cremonese, G., Da Deppo, Vania, Davidsson, B., Debei, S., De Cecco, M., Deller, J., Fornasier, S., Groussin, O., Gutiérrez, Pedro J., Hviid, H.S., Ip, W. H., Jorda, L., Keller, H.U., Knollenberg, J., Kramm, J.R., Kührt, E., Küppers, M., Lara, Luisa María, Lazzarin, M., López-Moreno, José Juan, Shi, X., Thomas, N., Tubiana, C.
Tipo de recurso:	artículo
Estado:	Versión publicada
Fecha de publicación:	2018
País:	España
Institución:	Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:	DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:	oai:digital.csic.es:10261/209180
Acceso en línea:	http://hdl.handle.net/10261/209180
Access Level:	acceso abierto
Palabra clave:	Comets: general Comets: individual: 67P/Churyumov-Gerasimenko Space vehicles

id	ES_6e2cfb5d8d27efc8f8e58336125e60b8
oai_identifier_str	oai:digital.csic.es:10261/209180
network_acronym_str	ES
network_name_str	España
repository_id_str
spelling	The phase function and density of the dust observed at comet 67P/Churyumov-GerasimenkoFulle, M.Bertini, I.Della Corte, V.Güttler, C.Ivanovski, S.La Forgia, F.Lasue, J.Levasseur-Regourd, A. C.Marzari, F.Moreno, FernandoMottola, S.Naletto, G.Palumbo, P.Rinaldi, G.Rotundi, A.Sierks, H.Barbieri, C.Lamy, P.L.Rodrigo Montero, RafaelKoschny, D.Rickman, H.Barucci, M.A.Bertaux, J.L.Bodewits, D.Cremonese, G.Da Deppo, VaniaDavidsson, B.Debei, S.De Cecco, M.Deller, J.Fornasier, S.Groussin, O.Gutiérrez, Pedro J.Hviid, H.S.Ip, W. H.Jorda, L.Keller, H.U.Knollenberg, J.Kramm, J.R.Kührt, E.Küppers, M.Lara, Luisa MaríaLazzarin, M.López-Moreno, José JuanShi, X.Thomas, N.Tubiana, C.Comets: generalComets: individual: 67P/Churyumov-GerasimenkoSpace vehiclesThe OSIRIS camera onboard Rosetta measured the phase function of both the coma dust and the nucleus. The two functions have a very different slope versus the phase angle. Here, we show that the nucleus phase function should be adopted to convert the brightness to the size of dust particles larger than 2.5 mm only. This makes the dust bursts observed close to Rosetta by OSIRIS, occurring about every hour, consistent with the fragmentation on impact with Rosetta of parent particles, whose flux agrees with the dust flux observed by GIADA. OSIRIS also measured the antisunward acceleration of the fragments, thus providing the first direct measurement of the solar radiation force acting on the dust fragments and thus of their bulk density, excluding any measurable rocket effect by the ice sublimation from the dust. The obtained particle density distribution has a peak matching the bulk density of most COSIMA particles, and represents a subset of the density distribution measured by GIADA. This implies a bias in the elemental abundances measured by COSIMA, which thus are consistent with the 67P dust mass fractions inferred by GIADA, i.e. (38 ± 8) per cent of hydrocarbons versus the (62 ± 8) per cent of sulphides and silicates.© 2018 The Author(s).Published by Oxford University Press on behalf of the Royal Astronomical Society.We thank the anonymous referee for having significantly improved the paper; and the Rosetta Science Ground Segment at ESAC, the Rosetta Mission Operations Centre at ESOC, and the Rosetta Project at ESTEC for their outstanding work enabling the science return of the Rosetta Mission. All GIADA data presented here are available on request before archiving in the PSA. This research was supported by the Italian Space Agency (ASI) within the ASI-INAF agreements I/032/05/0 and I/024/12/0.Oxford University PressAgenzia Spaziale ItalianaConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2020202020182020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/209180reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1093/mnras/sty464Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2091802026-05-22T06:33:51Z
dc.title.none.fl_str_mv	The phase function and density of the dust observed at comet 67P/Churyumov-Gerasimenko
title	The phase function and density of the dust observed at comet 67P/Churyumov-Gerasimenko
spellingShingle	The phase function and density of the dust observed at comet 67P/Churyumov-Gerasimenko Fulle, M. Comets: general Comets: individual: 67P/Churyumov-Gerasimenko Space vehicles
title_short	The phase function and density of the dust observed at comet 67P/Churyumov-Gerasimenko
title_full	The phase function and density of the dust observed at comet 67P/Churyumov-Gerasimenko
title_fullStr	The phase function and density of the dust observed at comet 67P/Churyumov-Gerasimenko
title_full_unstemmed	The phase function and density of the dust observed at comet 67P/Churyumov-Gerasimenko
title_sort	The phase function and density of the dust observed at comet 67P/Churyumov-Gerasimenko
dc.creator.none.fl_str_mv	Fulle, M. Bertini, I. Della Corte, V. Güttler, C. Ivanovski, S. La Forgia, F. Lasue, J. Levasseur-Regourd, A. C. Marzari, F. Moreno, Fernando Mottola, S. Naletto, G. Palumbo, P. Rinaldi, G. Rotundi, A. Sierks, H. Barbieri, C. Lamy, P.L. Rodrigo Montero, Rafael Koschny, D. Rickman, H. Barucci, M.A. Bertaux, J.L. Bodewits, D. Cremonese, G. Da Deppo, Vania Davidsson, B. Debei, S. De Cecco, M. Deller, J. Fornasier, S. Groussin, O. Gutiérrez, Pedro J. Hviid, H.S. Ip, W. H. Jorda, L. Keller, H.U. Knollenberg, J. Kramm, J.R. Kührt, E. Küppers, M. Lara, Luisa María Lazzarin, M. López-Moreno, José Juan Shi, X. Thomas, N. Tubiana, C.
author	Fulle, M.
author_facet	Fulle, M. Bertini, I. Della Corte, V. Güttler, C. Ivanovski, S. La Forgia, F. Lasue, J. Levasseur-Regourd, A. C. Marzari, F. Moreno, Fernando Mottola, S. Naletto, G. Palumbo, P. Rinaldi, G. Rotundi, A. Sierks, H. Barbieri, C. Lamy, P.L. Rodrigo Montero, Rafael Koschny, D. Rickman, H. Barucci, M.A. Bertaux, J.L. Bodewits, D. Cremonese, G. Da Deppo, Vania Davidsson, B. Debei, S. De Cecco, M. Deller, J. Fornasier, S. Groussin, O. Gutiérrez, Pedro J. Hviid, H.S. Ip, W. H. Jorda, L. Keller, H.U. Knollenberg, J. Kramm, J.R. Kührt, E. Küppers, M. Lara, Luisa María Lazzarin, M. López-Moreno, José Juan Shi, X. Thomas, N. Tubiana, C.
author_role	author
author2	Bertini, I. Della Corte, V. Güttler, C. Ivanovski, S. La Forgia, F. Lasue, J. Levasseur-Regourd, A. C. Marzari, F. Moreno, Fernando Mottola, S. Naletto, G. Palumbo, P. Rinaldi, G. Rotundi, A. Sierks, H. Barbieri, C. Lamy, P.L. Rodrigo Montero, Rafael Koschny, D. Rickman, H. Barucci, M.A. Bertaux, J.L. Bodewits, D. Cremonese, G. Da Deppo, Vania Davidsson, B. Debei, S. De Cecco, M. Deller, J. Fornasier, S. Groussin, O. Gutiérrez, Pedro J. Hviid, H.S. Ip, W. H. Jorda, L. Keller, H.U. Knollenberg, J. Kramm, J.R. Kührt, E. Küppers, M. Lara, Luisa María Lazzarin, M. López-Moreno, José Juan Shi, X. Thomas, N. Tubiana, C.
author2_role	author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author
dc.contributor.none.fl_str_mv	Agenzia Spaziale Italiana Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv	Comets: general Comets: individual: 67P/Churyumov-Gerasimenko Space vehicles
topic	Comets: general Comets: individual: 67P/Churyumov-Gerasimenko Space vehicles
description	The OSIRIS camera onboard Rosetta measured the phase function of both the coma dust and the nucleus. The two functions have a very different slope versus the phase angle. Here, we show that the nucleus phase function should be adopted to convert the brightness to the size of dust particles larger than 2.5 mm only. This makes the dust bursts observed close to Rosetta by OSIRIS, occurring about every hour, consistent with the fragmentation on impact with Rosetta of parent particles, whose flux agrees with the dust flux observed by GIADA. OSIRIS also measured the antisunward acceleration of the fragments, thus providing the first direct measurement of the solar radiation force acting on the dust fragments and thus of their bulk density, excluding any measurable rocket effect by the ice sublimation from the dust. The obtained particle density distribution has a peak matching the bulk density of most COSIMA particles, and represents a subset of the density distribution measured by GIADA. This implies a bias in the elemental abundances measured by COSIMA, which thus are consistent with the 67P dust mass fractions inferred by GIADA, i.e. (38 ± 8) per cent of hydrocarbons versus the (62 ± 8) per cent of sulphides and silicates.© 2018 The Author(s).Published by Oxford University Press on behalf of the Royal Astronomical Society.
publishDate	2018
dc.date.none.fl_str_mv	2018 2020 2020 2020
dc.type.none.fl_str_mv	info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 Publisher's version info:eu-repo/semantics/publishedVersion
format	article
status_str	publishedVersion
dc.identifier.none.fl_str_mv	http://hdl.handle.net/10261/209180
url	http://hdl.handle.net/10261/209180
dc.language.none.fl_str_mv	Inglés
language_invalid_str_mv	Inglés
dc.relation.none.fl_str_mv	http://dx.doi.org/10.1093/mnras/sty464 Sí
dc.rights.none.fl_str_mv	info:eu-repo/semantics/openAccess
eu_rights_str_mv	openAccess
dc.publisher.none.fl_str_mv	Oxford University Press
publisher.none.fl_str_mv	Oxford University Press
dc.source.none.fl_str_mv	reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str	Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str	DIGITAL.CSIC. Repositorio Institucional del CSIC
collection	DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_	1869410405902712832
score	15.812429

The phase function and density of the dust observed at comet 67P/Churyumov-Gerasimenko

Similares en LA Referencia