Origin of the cataclysmic Late Heavy Bombardment period of the terrestrial planets
Rodney S. Gomes,Harold F. Levison,Harold F. Levison,Kleomenis Tsiganis,Alessandro Morbidelli +4 more
TLDR
This model not only naturally explains the Late Heavy Bombardment, but also reproduces the observational constraints of the outer Solar System.Abstract:
The petrology record on the Moon suggests that a cataclysmic spike in the cratering rate occurred approximately 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 we propose that the LHB was triggered by the rapid migration of the giant planets, which occurred after a long quiescent period. During this burst of migration, the planetesimal disk outside the orbits of the planets was destabilized, causing a sudden massive delivery of planetesimals to the inner Solar System. The asteroid belt was also strongly perturbed, with these objects supplying a significant fraction of the LHB impactors in accordance with recent geochemical evidence. Our model not only naturally explains the LHB, but also reproduces the observational constraints of the outer Solar System.read more
Citations
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Origin of the orbital architecture of the giant planets of the Solar System.
Kleomenis Tsiganis,Rodney S. Gomes,Rodney S. Gomes,Alessandro Morbidelli,Harold F. Levison,Harold F. Levison +5 more
TL;DR: 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.
Journal ArticleDOI
A low mass for Mars from Jupiter's early gas―driven migration
Kevin J. Walsh,Alessandro Morbidelli,Sean N. Raymond,Sean N. Raymond,David P. O'Brien,Avi Mandell +5 more
TL;DR: Simulation of the early Solar System shows how the inward migration of Jupiter to 1.5 au, and its subsequent outward migration, lead to a planetesimal disk truncated at 1’au; the terrestrial planets then form from this disk over the next 30–50 million years, with an Earth/Mars mass ratio consistent with observations.
Journal ArticleDOI
Evolution of Debris Disks
TL;DR: In this article, a review describes the theoretical framework within which debris disk evolution takes place and shows how that framework has been constrained by observations, including infrared photometry of large numbers of debris disks, providing snapshots of the dust present at different evolutionary phases.
Journal ArticleDOI
Lunar impact crater identification and age estimation with Chang’E data by deep and transfer learning
Chen Yang,Chen Yang,Haishi Zhao,Lorenzo Bruzzone,Jon Atli Benediktsson,Yanchun Liang,Bin Liu,Xingguo Zeng,Renchu Guan,Chunlai Li,Ziyuan Ouyang,Ziyuan Ouyang +11 more
TL;DR: In this paper, the authors identify more than 109,000 previously unrecognized lunar craters and date almost 19,000 craters based on transfer learning with deep neural networks, which results in the identification of 109,956 new craters, which is more than a dozen times greater than the initial number of recognized craters.
Journal ArticleDOI
Chaotic capture of Jupiter's Trojan asteroids in the early Solar System.
TL;DR: 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.
References
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Journal ArticleDOI
Origin of the orbital architecture of the giant planets of the Solar System.
Kleomenis Tsiganis,Rodney S. Gomes,Rodney S. Gomes,Alessandro Morbidelli,Harold F. Levison,Harold F. Levison +5 more
TL;DR: 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.
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Origin of the Earth and Moon
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Journal ArticleDOI
Chaotic capture of Jupiter's Trojan asteroids in the early Solar System.
TL;DR: 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.
Journal ArticleDOI
Source regions and timescales for the delivery of water to the Earth
Alessandro Morbidelli,John Chambers,Jonathan I. Lunine,J. M. Petit,F. Robert,Giovanni B. Valsecchi,K. E. Cyr +6 more
TL;DR: In this paper, the authors investigated the origin of Earth's water of dynamical models of primordial evolution of solar system bodies and check them with respect to chemical constraints, finding that it is plausible that the Earth accreted water all along its formation, from early phases when the solar nebula was still present to the late stages of gas-free sweepup of scattered planetesimals.