Busca avançada
Ano de início
Entree
(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Dynamical dispersal of primordial asteroid families

Texto completo
Autor(es):
Brasil, P. I. O. [1] ; Roig, F. [1] ; Nesvorny, D. [2] ; Carruba, V. [3] ; Aljbaae, S. [3] ; Huaman, M. E. [3]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] COAA, ON, BR-20921400 Rio De Janeiro, RJ - Brazil
[2] SW Res Inst, Boulder, CO 80302 - USA
[3] Univ Estadual Paulista, UNESP, Grp Dinam Orbital & Planetol, BR-12516410 Guaratingueta, SP - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: ICARUS; v. 266, p. 142-151, MAR 1 2016.
Citações Web of Science: 13
Resumo

Many asteroid families are identified and well characterized all over the main asteroid belt. Interestingly, however, none of them are older than 4 Gyr. Many mechanisms have been proposed to disperse such old primordial asteroid families that presumably have existed, but only very few have really worked. Here we present a plausible mechanism for dispersing primordial asteroid families that is based on the 5-planet instability model known as jumping Jupiter. Using two different evolutions for the jumping-Jupiter model, we have numerically integrated orbits of eight putative primordial families. Our results show that the most important effect on the asteroid families' eccentricity and inclination dispersal is that of the secular resonances, in some cases associated with the mean motion resonances. As for the semimajor axes spreading we find that the principal effect is that of close encounters with the fifth giant planet whose orbit briefly overlaps with (part of) the main belt. Therefore, the existence of a fifth giant planet with the mass comparable with that of Uranus' or Neptune's could contribute in important ways to dispersal of the primordial asteroid families. To have that effect, the interloper planet should go into and considerably interact with the asteroids during the instability phase. (c) 2015 Elsevier Inc. All rights reserved. (AU)

Processo FAPESP: 14/06762-2 - Famílias de asteroides em ressonâncias seculares
Beneficiário:Valerio Carruba
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 09/54006-4 - Um cluster de computadores para o Departamento de Astronomia do IAG-USP e para o Núcleo de Astrofísica da UNICSUL
Beneficiário:Elisabete Maria de Gouveia Dal Pino
Linha de fomento: Auxílio à Pesquisa - Programa Equipamentos Multiusuários