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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Dynamical dispersal of primordial asteroid families

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Brasil, P. I. O. [1] ; Roig, F. [1] ; Nesvorny, D. [2] ; Carruba, V. [3] ; Aljbaae, S. [3] ; Huaman, M. E. [3]
Total Authors: 6
[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
Total Affiliations: 3
Document type: Journal article
Source: ICARUS; v. 266, p. 142-151, MAR 1 2016.
Web of Science Citations: 13

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)

FAPESP's process: 14/06762-2 - Secular families
Grantee:Valerio Carruba
Support type: Regular Research Grants
FAPESP's process: 09/54006-4 - A computer cluster for the Astronomy Department of the University of São Paulo Institute of Astronomy, Geophysics and Atmospheric Sciences and for the Cruzeiro do Sul University Astrophysics Center
Grantee:Elisabete Maria de Gouveia Dal Pino
Support type: Multi-user Equipment Program