Collisions, Cosmic Radiation and the Colors of the Trojan Asteroids

Autores
Melita, Mario Daniel; Strazzulla, G.; Bar Nun, A.
Año de publicación
2009
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Trojan asteroids orbit about the Lagrangian points of Jupiter and the residence times about their present location are very long for most of them. If these bodies originated in the outer Solar System, they should be mainly composed of water ice, but, in contrast with comets, all the volatiles close to the surface would have been lost long ago. Irrespective of the rotation period, and hence the surface temperature and ice sublimation rate, a dust layer exists always on the surface. We show that the timescale for resurfacing the entire surface of the Trojan asteroids is similar to that of the flattening of the red spectrum of the new dust by solar-proton irradiation. This, if the cut-off radius of the size distribution of the impacting objects is between 1mm and 1m and its slope is -3, for the entire size-range. Therefore, the surfaces of most Trojan asteroids should be composed mainly of unirradiated dust
Fil: Melita, Mario Daniel. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Strazzulla, G.. Osservatorio Astrofisico di Catania; Italia
Fil: Bar Nun, A.. Tel Aviv University; Israel
Materia
Asteroids
Solar System origin
Comets
Minor planets
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/20573
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Collisions, Cosmic Radiation and the Colors of the Trojan AsteroidsMelita, Mario DanielStrazzulla, G.Bar Nun, A.AsteroidsSolar System originCometsMinor planetshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The Trojan asteroids orbit about the Lagrangian points of Jupiter and the residence times about their present location are very long for most of them. If these bodies originated in the outer Solar System, they should be mainly composed of water ice, but, in contrast with comets, all the volatiles close to the surface would have been lost long ago. Irrespective of the rotation period, and hence the surface temperature and ice sublimation rate, a dust layer exists always on the surface. We show that the timescale for resurfacing the entire surface of the Trojan asteroids is similar to that of the flattening of the red spectrum of the new dust by solar-proton irradiation. This, if the cut-off radius of the size distribution of the impacting objects is between 1mm and 1m and its slope is -3, for the entire size-range. Therefore, the surfaces of most Trojan asteroids should be composed mainly of unirradiated dustFil: Melita, Mario Daniel. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; ArgentinaFil: Strazzulla, G.. Osservatorio Astrofisico di Catania; ItaliaFil: Bar Nun, A.. Tel Aviv University; IsraelAcademic Press Inc Elsevier Science2009-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/20573Melita, Mario Daniel; Strazzulla, G.; Bar Nun, A.; Collisions, Cosmic Radiation and the Colors of the Trojan Asteroids; Academic Press Inc Elsevier Science; Icarus; 203; 1; 4-2009; 134-1390019-1035CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/0906.4130info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0019103509001894info:eu-repo/semantics/altIdentifier/doi/10.1016/j.icarus.2009.04.024info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:58:39Zoai:ri.conicet.gov.ar:11336/20573instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:58:40.095CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Collisions, Cosmic Radiation and the Colors of the Trojan Asteroids
title Collisions, Cosmic Radiation and the Colors of the Trojan Asteroids
spellingShingle Collisions, Cosmic Radiation and the Colors of the Trojan Asteroids
Melita, Mario Daniel
Asteroids
Solar System origin
Comets
Minor planets
title_short Collisions, Cosmic Radiation and the Colors of the Trojan Asteroids
title_full Collisions, Cosmic Radiation and the Colors of the Trojan Asteroids
title_fullStr Collisions, Cosmic Radiation and the Colors of the Trojan Asteroids
title_full_unstemmed Collisions, Cosmic Radiation and the Colors of the Trojan Asteroids
title_sort Collisions, Cosmic Radiation and the Colors of the Trojan Asteroids
dc.creator.none.fl_str_mv Melita, Mario Daniel
Strazzulla, G.
Bar Nun, A.
author Melita, Mario Daniel
author_facet Melita, Mario Daniel
Strazzulla, G.
Bar Nun, A.
author_role author
author2 Strazzulla, G.
Bar Nun, A.
author2_role author
author
dc.subject.none.fl_str_mv Asteroids
Solar System origin
Comets
Minor planets
topic Asteroids
Solar System origin
Comets
Minor planets
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The Trojan asteroids orbit about the Lagrangian points of Jupiter and the residence times about their present location are very long for most of them. If these bodies originated in the outer Solar System, they should be mainly composed of water ice, but, in contrast with comets, all the volatiles close to the surface would have been lost long ago. Irrespective of the rotation period, and hence the surface temperature and ice sublimation rate, a dust layer exists always on the surface. We show that the timescale for resurfacing the entire surface of the Trojan asteroids is similar to that of the flattening of the red spectrum of the new dust by solar-proton irradiation. This, if the cut-off radius of the size distribution of the impacting objects is between 1mm and 1m and its slope is -3, for the entire size-range. Therefore, the surfaces of most Trojan asteroids should be composed mainly of unirradiated dust
Fil: Melita, Mario Daniel. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Strazzulla, G.. Osservatorio Astrofisico di Catania; Italia
Fil: Bar Nun, A.. Tel Aviv University; Israel
description The Trojan asteroids orbit about the Lagrangian points of Jupiter and the residence times about their present location are very long for most of them. If these bodies originated in the outer Solar System, they should be mainly composed of water ice, but, in contrast with comets, all the volatiles close to the surface would have been lost long ago. Irrespective of the rotation period, and hence the surface temperature and ice sublimation rate, a dust layer exists always on the surface. We show that the timescale for resurfacing the entire surface of the Trojan asteroids is similar to that of the flattening of the red spectrum of the new dust by solar-proton irradiation. This, if the cut-off radius of the size distribution of the impacting objects is between 1mm and 1m and its slope is -3, for the entire size-range. Therefore, the surfaces of most Trojan asteroids should be composed mainly of unirradiated dust
publishDate 2009
dc.date.none.fl_str_mv 2009-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/20573
Melita, Mario Daniel; Strazzulla, G.; Bar Nun, A.; Collisions, Cosmic Radiation and the Colors of the Trojan Asteroids; Academic Press Inc Elsevier Science; Icarus; 203; 1; 4-2009; 134-139
0019-1035
CONICET Digital
CONICET
url http://hdl.handle.net/11336/20573
identifier_str_mv Melita, Mario Daniel; Strazzulla, G.; Bar Nun, A.; Collisions, Cosmic Radiation and the Colors of the Trojan Asteroids; Academic Press Inc Elsevier Science; Icarus; 203; 1; 4-2009; 134-139
0019-1035
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/0906.4130
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0019103509001894
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.icarus.2009.04.024
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Academic Press Inc Elsevier Science
publisher.none.fl_str_mv Academic Press Inc Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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