Collisions, cosmic radiation and the colors of the Trojan asteroids

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 cl...

Descripción completa

Guardado en:
Detalles Bibliográficos
Publicado: 2009
Materias:
Asteroids
Comets
Origin
Solar System
Surfaces
Trojan asteroids
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00191035_v203_n1_p134_Melita
http://hdl.handle.net/20.500.12110/paper_00191035_v203_n1_p134_Melita
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00191035_v203_n1_p134_Melita
record_format dspace
spelling paper:paper_00191035_v203_n1_p134_Melita2023-06-08T14:40:15Z Collisions, cosmic radiation and the colors of the Trojan asteroids Asteroids Comets Origin Solar System Surfaces Trojan asteroids 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 1 mm and 1 m and its slope is -3, for the entire size range. Therefore, the surfaces of most Trojan asteroids should be composed mainly of unirradiated dust. © 2009 Elsevier Inc. All rights reserved. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00191035_v203_n1_p134_Melita http://hdl.handle.net/20.500.12110/paper_00191035_v203_n1_p134_Melita
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Asteroids
Comets
Origin
Solar System
Surfaces
Trojan asteroids
spellingShingle Asteroids
Comets
Origin
Solar System
Surfaces
Trojan asteroids
Collisions, cosmic radiation and the colors of the Trojan asteroids
topic_facet Asteroids
Comets
Origin
Solar System
Surfaces
Trojan asteroids
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 1 mm and 1 m and its slope is -3, for the entire size range. Therefore, the surfaces of most Trojan asteroids should be composed mainly of unirradiated dust. © 2009 Elsevier Inc. All rights reserved.
title Collisions, cosmic radiation and the colors of the Trojan asteroids
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
publishDate 2009
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00191035_v203_n1_p134_Melita
http://hdl.handle.net/20.500.12110/paper_00191035_v203_n1_p134_Melita
_version_ 1768541735738146816

Ejemplares similares