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Constraints on the terminal ejection velocity fields of asteroid families

Grant number: 16/04476-8
Support type:Regular Research Grants
Duration: July 01, 2016 - June 30, 2018
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
Assoc. researchers:David Nesvorný ; Mariela Huaman Espinoza ; Rita de Cássia Domingos ; Safwan Aljbaae

Abstract

Asteroid families form as a result of large-scale collisions among main belt asteroids. The orbital distribution of fragments after a family-forming impact could inform us about their ejection velocities. Unfortunately, however, orbits dynamically evolve by a number of effects, including the Yarkovsky drift, chaotic diffusion, and gravitational encounters with massive asteroids, such that it is difficult to infer the ejection velocities eons after each family's formation. While methods to estimate the entity of the original ejection velocity field based on the current semi-major axis distribution of asteroid families have been proposed in the past, recently it has been suggested that, at least for some families, the inclination distribution could still provide clues about the original dispersion of some asteroid groups. In this work we propose to study the families whose leptokurtic currentdistribution in the component of the ejection velocity that is perpendicular to the orbital plane ($v_W$) suggest that informationon the original ejection velocity field could still be available. Obtaining independent constraints on such values could provideprecious clues about the physical mechanisms involved in the collisionary events that form asteroid families, and set constraints on models used to reproduce such events, such as the SPH codes. (AU)

Scientific publications (12)
(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)
CARRUBA, V; RAMOS, L. G. M.; SPOTO, F. Spin clusters inside four young asteroid groups. Monthly Notices of the Royal Astronomical Society, v. 493, n. 2, p. 2556-2567, APR 2020. Web of Science Citations: 0.
CARRUBA, V. On the age of the Beagle secondary asteroid family. Planetary and Space Science, v. 166, p. 90-100, FEB 2019. Web of Science Citations: 0.
CARRUBA, V; BARLETTA, W. The influence of Ceres on the dynamical evolution of the Zdenekhorsky/ Nemesis asteroid family. Planetary and Space Science, v. 165, p. 10-18, JAN 2019. Web of Science Citations: 0.
HUAMAN, M.; ROIG, F.; CARRUBA, V; DOMINGOS, R. C.; ALJBAAE, S. The resonant population of asteroids in librating states of the nu(6) linear secular resonance. Monthly Notices of the Royal Astronomical Society, v. 481, n. 2, p. 1707-1717, DEC 2018. Web of Science Citations: 0.
CARRUBA, V.; DE OLIVEIRA, E. R.; RODRIGUES, B.; REQUENA, I. The quest for young asteroid families: new families, new results. Monthly Notices of the Royal Astronomical Society, v. 479, n. 4, p. 4815-4823, OCT 2018. Web of Science Citations: 3.
CARRUBA, V.; VOKROUHLICKY, D.; NOVAKOVIC, B. Asteroid families interacting with secular resonances. Planetary and Space Science, v. 157, p. 72-81, AUG 2018. Web of Science Citations: 2.
CARRUBA, V; VOKROUHLICKY, D.; NESVORNY, D.; ALJBAAE, S. On the age of the Nele asteroid family. Monthly Notices of the Royal Astronomical Society, v. 477, n. 1, p. 1308-1317, JUN 2018. Web of Science Citations: 5.
CARRUBA, V.; VOKROUHLICKY, D.; NESVORNY, D. Detection of the Yarkovsky effect for C-type asteroids in the Veritas family. Monthly Notices of the Royal Astronomical Society, v. 469, n. 4, p. 4400-4413, AUG 2017. Web of Science Citations: 9.
RADOVIC, VIKTOR; NOVAKOVIC, BOJAN; CARRUBA, VALERIO; MARCETA, DUSAN. An automatic approach to exclude interlopers from asteroid families. Monthly Notices of the Royal Astronomical Society, v. 470, n. 1, p. 576-591, AUG 2017. Web of Science Citations: 4.
CARRUBA, V.; NOVAKOVIC, B.; ALJBAAE, S. The Hoffmeister asteroid family. Monthly Notices of the Royal Astronomical Society, v. 465, n. 4, p. 4099-4105, MAR 2017. Web of Science Citations: 2.
ALJBAAE, S.; CHANUT, T. G. G.; CARRUBA, V.; SOUCHAY, J.; PRADO, A. F. B. A.; AMARANTE, A. The dynamical environment of asteroid 21 Lutetia according to different internal models. Monthly Notices of the Royal Astronomical Society, v. 464, n. 3, p. 3552-3560, JAN 2017. Web of Science Citations: 13.
CARRUBA, V.; DOMINGOS, R. C.; ALJBAAE, S.; HUAMAN, M. On the highly inclined v(W) leptokurtic asteroid families. Monthly Notices of the Royal Astronomical Society, v. 463, n. 1, p. 705-711, NOV 21 2016. Web of Science Citations: 4.

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