Scattering V-type asteroids during the giant planets instability: A step for Jupiter, a leap for basalt
| Autor: | David Nesvorný, Valerio Carruba, P. I. O. Brasil, Fernando Roig |
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| Přispěvatelé: | Observ Nacl, Southwest Res Inst, Universidade Estadual Paulista (Unesp) |
| Rok vydání: | 2017 |
| Předmět: |
Physics
Earth and Planetary Astrophysics (astro-ph.EP) dynamical evolution and stability [planets and satellites] Solar System Near-Earth object 010504 meteorology & atmospheric sciences Giant planet Astronomy FOS: Physical sciences Astronomy and Astrophysics 01 natural sciences general [asteroids] Astrobiology Jupiter Jumping-Jupiter scenario Space and Planetary Science Asteroid Planet 0103 physical sciences minor planets Asteroid belt 010303 astronomy & astrophysics Astrophysics - Earth and Planetary Astrophysics 0105 earth and related environmental sciences |
| Zdroj: | Web of Science Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| DOI: | 10.48550/arxiv.1703.00474 |
| Popis: | V-type asteroids are a taxonomic class whose surface is associated to a basaltic composition. The only known source of V-type asteroids in the Main Asteroid Belt is (4) Vesta, that is located in the inner part of the belt. However, many V-type asteroids cannot be dynamically linked to Vesta., in particular, those asteroids located in the middle and outer parts of the Belt. Previous works have failed to find mechanisms to transport V-type asteroids from the inner to the middle and outer belt. In this work we propose a dynamical mechanism that could have acted on primordial asteroid families. We consider a model of the giant planets migration known as the jumping Jupiter model with five planets. Our study is focused on the period of 10 Myr that encompasses the instability phase of the giant planets. We show that, for different hypothetical Vesta-like paleo-families in the inner belt, the perturbations caused by the ice giant that is scattered into the asteroid belt before being ejected from the solar system, are able to scatter V-type asteroids to the middle and outer belt. Based on the orbital distribution of V-type candidates identified from the Sloan Digital Sky Survey and the VISTA Survey colours, we show that this mechanism is efficient enough provided that the hypothetical paleo-family originated from a 100 to 500 km crater excavated on the surface of (4) Vesta. This mechanism is able to explain the currently observed V-type asteroids in the middle and outer belt, with the exception of (1459) Magnya. Comment: 10 pages, 4 figures. To appear in MNRAS |
| Databáze: | OpenAIRE |
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