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Orbital mobility caused by close encounters with more than one massive asteroid

Grant number: 11/19863-3
Support type:Regular Research Grants
Duration: February 01, 2012 - July 31, 2014
Field of knowledge:Physical Sciences and Mathematics - Astronomy - Solar System Astronomy
Principal Investigator:Valerio Carruba
Grantee:Valerio Carruba
Home Institution: Faculdade de Engenharia (FEG). Universidade Estadual Paulista (UNESP). Campus de Guaratinguetá. Guaratinguetá , SP, Brazil

Abstract

Orbital diffusion caused by close encounters between a small asteroid and one of the most massive objects of the main belt, (1) Ceres, (2) Pallas, (4) Vesta, (7) Iris, and (324) Bamberga, was already known to be a mechanism able to change proper elements of asteroids in the orbital proximity of (1) Ceres and (4) Vesta (Carruba et al. 2003, 2007). Changes in semi-major axis, eccentricity and inclination caused by the long-term effect of close encounters with (4) Vesta can have contributed to the diffusion of some V-type objects outside the Vesta family, whose current orbits cannot be easily explained in terms of migration induced by other mechanisms, such as the Yarkovsky effect, interaction with mean-motion or secular resonances, or the interplay of both.The long-term effect of close encounters in previous works was not negligible, but of small entity, and only important in regions characterized by high collision probabilities with one of the most massive asteroids. Recently Laskar et al. (2011) showed that, when the five most massive asteroids are all included in simulations with all the other planets, surprisingly not only the orbits of the massive asteroids become more chaotic, but even the precision with which the orbital elements of the Earth are known with high accuracy is limited to 50 Myr. However, the effects on asteroid mobility of close encounters in the region of the five most massive asteroids have not yet be studied in detail when all five asteroids are considered.In this work we want to investigate if the mobility in proper elements of minor bodies is affected when the new integration scheme of Laskar (the entire Solar System plus the five most massive asteroids in the main belt) is considered. (AU)

Matéria(s) publicada(s) na Agência FAPESP sobre o auxílio:
Study identifies possible origins of “differentiated” celestial objects  
New method identifies families of asteroids with greater precision 
Study evaluates the impact of asteroid encounters 

Scientific publications (9)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
CHANUT, T. G. G.; ALJBAAE, S.; CARRUBA, V. Mascon gravitation model using a shaped polyhedral source. Monthly Notices of the Royal Astronomical Society, v. 450, n. 4, p. 3742-3749, JUL 11 2015. Web of Science Citations: 19.
HUAMAN, M. E.; CARRUBA, V.; DOMINGOS, R. C. Dynamical evolution of V-type photometric candidates in the outer main belt. Monthly Notices of the Royal Astronomical Society, v. 444, n. 3, p. 2985-2992, NOV 1 2014. Web of Science Citations: 7.
CARRUBA, V.; ALJBAAE, S.; SOUAMI, D. PECULIAR EUPHROSYNE. ASTROPHYSICAL JOURNAL, v. 792, n. 1 SEP 1 2014. Web of Science Citations: 11.
CARRUBA, V.; HUAMAN, M. E.; DOMINGOS, R. C.; DOS SANTOS, C. R.; SOUAMI, D. Dynamical evolution of V-type asteroids in the central main belt. Monthly Notices of the Royal Astronomical Society, v. 439, n. 3, p. 3168-3179, APR 2014. Web of Science Citations: 17.
CARRUBA, V.; DOMINGOS, R. C.; HUAMAN, M. E.; DOS SANTOS, C. R.; SOUAMI, D. Dynamical evolution and chronology of the Hygiea asteroid family. Monthly Notices of the Royal Astronomical Society, v. 437, n. 3, p. 2279-2290, JAN 2014. Web of Science Citations: 13.
CARRUBA, V.; DOMINGOS, R. C.; NESVORNY, D.; ROIG, F.; HUAMAN, M. E.; SOUAMI, D. A multidomain approach to asteroid families' identification. Monthly Notices of the Royal Astronomical Society, v. 433, n. 3, p. 2075-2096, AUG 2013. Web of Science Citations: 32.
CARRUBA, V. An analysis of the Hygiea asteroid family orbital region. Monthly Notices of the Royal Astronomical Society, v. 431, n. 4, p. 3557-3569, JUN 2013. Web of Science Citations: 12.
CARRUBA, V.; HUAMAN, M.; DOMINGOS, R. C.; ROIG, F. Chaotic diffusion caused by close encounters with several massive asteroids II. The regions of (10) Hygiea, (2) Pallas, and (31) Euphrosyne. Astronomy & Astrophysics, v. 550, FEB 2013. Web of Science Citations: 14.
CARRUBA, V.; HUAMAN, M.; DOUWENS, S.; DOMINGOS, R. C. Chaotic diffusion caused by close encounters with several massive asteroids The (4) Vesta case. Astronomy & Astrophysics, v. 543, JUL 2012. Web of Science Citations: 6.

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