Scattering V-type asteroids during the giant planets instability: A step for Jupiter, a leap for basalt

Abstract

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.

10 pages, 4 figures. To appear in MNRAS

References in corpus (22)

• Statistical Study of the Early Solar System's Instability with 4, 5 and 6 Giant Planets
• Capture of Trojans by Jumping Jupiter
• Asteroid families classification: exploiting very large data sets
• Young Solar System's Fifth Giant Planet?
• Constructing the secular architecture of the solar system II: The terrestrial planets
• Jumping Neptune Can Explain the Kuiper Belt Kernel
• Capture of Irregular Satellites at Jupiter
• The Distribution of Basaltic Asteroids in the Main Belt
• The evolution of asteroids in the jumping-Jupiter migration model
• V-type asteroids in the middle Main Belt
• Orbital Perturbations of the Galilean Satellites During Planetary Encounters
• Near-infrared colors of minor planets recovered from VISTA - VHS survey (MOVIS)
• Modeling the Historical Flux of Planetary Impactors
• Constraining the Cratering Chronology of Vesta
• Excitation of the Orbital Inclination of Iapetus during Planetary Encounters
• Collisional Formation and Modeling of Asteroid Families
• Dynamical evolution of V-type asteroids in the central main belt
• Spectral characterization of V-type asteroids - II. A statistical analysis
• On the oldest asteroid families in the main belt
• Dynamical evolution of V-type photometric candidates in the outer Main-belt
• Capture Probability in the 3:1 Mean Motion Resonance with Jupiter
• Asteroid 4 Vesta: dynamical and collisional evolution during the Late Heavy Bombardment

Cited by in corpus (9)

• Taxonomic classification of asteroids based on MOVIS near-infrared colors
• Basalt or not? Near-infrared spectra, surface mineralogical estimates, and meteorite analogs for 33 Vp-type asteroids
• Dynamical evolution of basaltic asteroids outside the Vesta family in the inner main belt
• Origin and dynamical evolution of the asteroid belt
• Spectral analysis of basaltic asteroids observed by the Gaia space mission
• Distribution and spectrophotometric classification of basaltic asteroids
• Can a jumping-Jupiter trigger the Moon's formation impact?
• Basaltic material in the main belt: a tale of two (or more) parent bodies?
• Spectral characterisation of 14 V-type candidate asteroids from the MOVIS catalogue