Origin of the cataclysmic Late Heavy Bombardment period of the terrestrial planets

  title={Origin of the cataclysmic Late Heavy Bombardment period of the terrestrial planets},
  author={Rodney Gomes and Harold F. Levison and Kleomenis Tsiganis and Alessandro Morbidelli},
The petrology record on the Moon suggests that a cataclysmic spike in the cratering rate occurred ∼700 million years after the planets formed; this event is known as the Late Heavy Bombardment (LHB). Planetary formation theories cannot naturally account for an intense period of planetesimal bombardment so late in Solar System history. Several models have been proposed to explain a late impact spike, but none of them has been set within a self-consistent framework of Solar System evolution. Here… 
The Collisional Evolution of the Main Asteroid Belt
The main asteroid belt is a living relic. It contains a record of what happened to the solar system in terms of bombardment since the planet-formation epoch. Ongoing collisional and dynamical
Modeling the Historical Flux of Planetary Impactors
The impact cratering record of the Moon and the terrestrial planets provides important clues about the formation and evolution of the solar system. Especially intriguing is the epoch ≃3.8–3.9 Gyr ago
Onset of Giant Planet Migration before 4480 Million Years Ago
Soon after their formation, the terrestrial planets experienced intense impact bombardment by comets, leftover planetesimals from primary accretion, and asteroids. This temporal interval in solar
Magnitude and timing of the giant planet instability: A reassessment from the perspective of the asteroid belt
It is generally accepted today that our solar system has undergone a phase during which the orbits of the giant planets became very unstable. In recent years, many studies have identified traces of
Origin and Evolution of the Cometary Reservoirs
Comets have three known reservoirs: the roughly spherical Oort Cloud (for long-period comets), the flattened Kuiper Belt (for ecliptic comets), and, surprisingly, the asteroid belt (for main-belt


A plausible cause of the late heavy bombardment
Abstract— We show that at the end of the main accretional period of the terrestrial planets, a few percent of the initial planetesimal population in the 1–2 AU zone is left on highly‐inclined orbits
Could the Lunar “Late Heavy Bombardment” Have Been Triggered by the Formation of Uranus and Neptune?
We investigate the hypothesis that the so-called Late Heavy Bombardment (LHB) of the Moon was triggered by the formation of Uranus and Neptune. As Uranus and Neptune formed, which we assume occurred
Orbital Evolution of Planets Embedded in a Planetesimal Disk
The existence of the Oort comet cloud, the Kuiper belt, and plausible inefficiencies in planetary core formation all suggest that there was once a residual planetesimal disk of mass ∼10–100 M⊕ in the
Origin of the orbital architecture of the giant planets of the Solar System
This model reproduces all the important characteristics of the giant planets' orbits, namely their final semimajor axes, eccentricities and mutual inclinations, provided that Jupiter and Saturn crossed their 1:2 orbital resonance.
The Primordial Excitation and Clearing of the Asteroid Belt
Abstract In this paper, we use N -body integrations to study the effect that planetary embryos spread between ∼0.5 and 4 AU would have on primordial asteroids. The most promising model for the
Chaotic capture of Jupiter's Trojan asteroids in the early Solar System
It is shown that the Trojans could have formed in more distant regions and been subsequently captured into co-orbital motion with Jupiter during the time when the giant planets migrated by removing neighbouring planetesimals.
Cataclysmic bombardment throughout the inner solar system 3.9–4.0 Ga
[1] Cohen et al. [2000] recently confirmed the hypothesis that the Moon was resurfaced by an intense period of impact cratering ∼3.9 Ga ago and, by inference, that the Earth also sustained
Source regions and timescales for the delivery of water to the Earth
Abstract— In the primordial solar system, the most plausible sources of the water accreted by the Earth were in the outer asteroid belt, in the giant planet regions, and in the Kuiper Belt. We