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Instabilities and strong dynamical interactions between several giant planets have been proposed as a possible explanation for the surprising orbital properties of extrasolar planetary systems. In particular, dynamical instabilities would…

Astrophysics · Physics 2007-05-23 Eric B. Ford , Marketa Havlickova , Frederic A. Rasio

The Earth's Moon is thought to have formed by an impact between the Earth and an impactor around 4.5 billion years ago. This impact could have been so energetic that it could have mixed and homogenized the Earth's mantle. However, this view…

Earth and Planetary Astrophysics · Physics 2015-06-17 Miki Nakajima , David J. Stevenson

In their model for the origin of the parent bodies of iron meteorites, Bottke et al proposed differentiated planetesimals that were formed in the region of 1-2 AU during the first 1.5 Myr, as the parent bodies, and suggested that these…

Earth and Planetary Astrophysics · Physics 2015-06-04 Nader Haghighipour , Edward R. D. Scott

Recent observations have revealed the eccentricity and inclination distributions of close-in super-Earths. These distributions have the potential to constrain their formation processes. In the in-situ formation scenario, the eccentricities…

Earth and Planetary Astrophysics · Physics 2017-07-05 Yuji Matsumoto , Eiichiro Kokubo

The late-stage formation of giant planetary systems is rich in interesting dynamical mechanisms. Previous simulations of three giant planets initially on quasi-circular and quasi-coplanar orbits in the gas disc have shown that highly…

Earth and Planetary Astrophysics · Physics 2018-05-02 Anne-Sophie Libert , Sotiris Sotiriadis , Kyriaki I. Antoniadou

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 (Ga), known as the Late Heavy Bombardment…

Earth and Planetary Astrophysics · Physics 2017-02-15 David Nesvorny , Fernando Roig , William F. Bottke

Based on the planet-satellite dynamics, a new perspective on the birth and evolution of the Solar System was proposed in 2004. This new perspective has 1:2 Mean Motion Resonance (1:2 MMR, that is Ps/Pj = 2) implicit in itself . This paper…

Astrophysics · Physics 2008-08-01 Bijay Kumar Sharma

The ubiquity of planets and diversity of planetary systems reveal planet formation encompass many complex and competing processes. In this series of papers, we develop and upgrade a population synthesis model as a tool to identify the…

Earth and Planetary Astrophysics · Physics 2015-06-16 S. Ida , D. N. C. Lin , M. Nagasawa

We investigate how the variation of the obliquity (the axial tilt) of a hypothetical exo-Earth is effected by the presence of a satellite, an exo-Moon. Namely, we study analytically and numerically how the range of obliquity of the…

Earth and Planetary Astrophysics · Physics 2022-04-27 O. M. Podvigina , P. S. Krasilnikov

The ``minimum-mass solar nebula'' (MMSN) model estimates the surface density distribution of the protoplanetary disk by assuming the planets to have formed in situ. However, significant radial migration of the giant planets likely occurred…

Astrophysics · Physics 2008-11-26 Sean N. Raymond , Thomas Quinn , Jonathan I. Lunine

The Moon is traditionally thought to have coalesced from the debris ejected by a giant impact onto the early Earth. However, such models struggle to explain the similar isotopic compositions of Earth and lunar rocks at the same time as the…

Earth and Planetary Astrophysics · Physics 2022-10-06 Jacob A. Kegerreis , Sergio Ruiz-Bonilla , Vincent R. Eke , Richard J. Massey , Thomas D. Sandnes , Luís F. A. Teodoro

Modern models of terrestrial planet formation require solids depletion interior to 0.5-0.7 au in the planetesimal disk to explain the small mass of Mercury. Earth and Venus analogues emerge after ~100 Myr collisional growth while Mercury…

Earth and Planetary Astrophysics · Physics 2021-01-20 Tong Fang , Hongping Deng

The formation of giant planets is best studied through direct imaging by observing planets both during and after formation. Giant planets are expected to form either by core accretion, which is typically associated with low initial entropy…

Earth and Planetary Astrophysics · Physics 2021-10-04 A. L. Wallace , M. J. Ireland , C. Federrath

Subsequent to the Moon's formation, late accretion to the terrestrial planets modified their silicate crusts and mantles. We combine dynamical N-body and Monte Carlo simulations to determine impact probabilities, impact velocities, and…

Earth and Planetary Astrophysics · Physics 2020-02-26 R. Brasser , S. C. Werner , S. J. Mojzsis

Giant impacts were common in the early evolution of the Solar System, and it is possible that Venus also experienced an impact. A giant impact on Venus could have affected its rotation rate and possibly its thermal evolution. In this work,…

Earth and Planetary Astrophysics · Physics 2025-10-15 Mirco Bussmann , Christian Reinhardt , Cedric Gillmann , Thomas Meier , Joachim Stadel , Paul Tackley , Ravit Helled

Circumstantial evidence suggests that most known extra-solar planetary systems are survivors of violent dynamical instabilities. Here we explore how giant planet instabilities affect the formation and survival of terrestrial planets. We…

We numerically investigate under which conditions the planet detected at 2.1 AU of Gamma-Cephei could form through the core-accretion scenario despite the perturbing presence of the highly eccentric companion star. We first show that the…

Astrophysics · Physics 2009-11-10 Philippe Thebault , Francesco Marzari , Hans Scholl , D. Turrini , Mauro Barbieri

Dynamical scenarios of terrestrial planets formation involve strong perturbations of the inner part of the solar system by the giant-planets, leading to enhanced impact velocities and subsequent collisional erosion. We quantitatively…

Earth and Planetary Astrophysics · Physics 2021-04-14 Laetitia Allibert , Sébastien Charnoz , Julien Siebert , Seth A. Jacobson , Sean N. Raymond

Centaurs are solar system objects with orbits situated among the orbits of Jupiter and Neptune. Centaurs represent one of the sources of Near-Earth Objects. Thus, it is crucial to understand their orbital evolution which in some cases might…

Earth and Planetary Astrophysics · Physics 2018-10-17 M. A. Galiazzo , E. A. Silber , R. Dvorak

Prevailing $N$-body planet formation models typically start with lunar-mass embryos and show a general trend of rapid migration of massive planetary cores to the inner Solar System in the absence of a migration trap. This setup cannot…

Earth and Planetary Astrophysics · Physics 2024-03-27 Tommy Chi Ho Lau , Man Hoi Lee , Ramon Brasser , Soko Matsumura