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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 develop a simple model of planetary formation, focusing our attention on those planets with masses less than 10 Earth masses and studying particularly the primordial spin parameters of planets resulting from the accretion of…

Earth and Planetary Astrophysics · Physics 2015-05-18 Yamila Miguel , Adrián Brunini

The formation of planetesimals was an integral part of the cascading series of processes that built the terrestrial planets. To illuminate planetesimal formation, here we develop a refined thermal evolution model to calculate the formation…

Earth and Planetary Astrophysics · Physics 2026-02-25 James Bryson , Hannah Sanderson , Francis Nimmo , Sanjana Sridhar , Gregory Brennecka , Yves Marrocchi , Jason Terry

The accretion ages of the first planetesimals-the parent bodies of magmatic iron meteorites-suggest they formed within the first 0.5-1 Myr of Solar System history. Yet, planetesimal formation appears to have occurred in at least two…

Earth and Planetary Astrophysics · Physics 2025-10-24 Baibhav Srivastava , André Izidoro

Recent radial velocity observations have indicated that Jovian-type planets can exist in moderately close binary star systems. Numerical simulations of the dynamical stability of terrestrial-class planets in such environments have shown…

Astrophysics · Physics 2008-11-26 Nader Haghighipour , Sean N. Raymond

The standard model for giant planet formation is based on the accretion of solids by a growing planetary embryo, followed by rapid gas accretion once the planet exceeds a so-called critical mass. The dominant size of the accreted solids…

We address Earth formation from an elemental perspective, using a method similar to Rubie et al. (2015) but with updates from Dale et al. (2023) to simulate the chemical evolution of Earth's mantle during metal-silicate equilibration events…

Earth and Planetary Astrophysics · Physics 2025-03-26 Katherine I. Dale , Alessandro Morbidelli , David C. Rubie , David Nesvorny

A substantial number of super-Earths have been discovered, and atmospheres of transiting super-Earths have also been observed by transmission spectroscopy. Several lines of observational evidence indicate that most super-Earths do not…

Earth and Planetary Astrophysics · Physics 2020-04-15 Masahiro Ogihara , Yasunori Hori

We study a solid protoplanetary core of 1-10 earth masses migrating through a disk. We suppose the core luminosity is generated as a result of planetesimal accretion and calculate the structure of the gaseous envelope assuming equilibrium.…

Astrophysics · Physics 2009-10-31 J. Papaloizou , C. Terquem

Formation of planets in the 47 UMa system is followed in an evolving protoplanetary disk composed of gas and solids. The evolution of the disk is calculated from an early stage, when all solids, assumed to be high-temperature silicates, are…

Astrophysics · Physics 2009-11-07 Kacper Kornet , Peter Bodenheimer , Michal Rozyczka

The four major satellites of Jupiter, known as the Galilean moons, and Saturn's most massive satellite, Titan, are believed to have formed in a predominantly gaseous circum-planetary disk, during the last stages of formation of their parent…

Earth and Planetary Astrophysics · Physics 2020-01-22 Thomas Ronnet , Anders Johansen

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

Planet formation is inherently linked to protoplanetary disc evolution, which recent developments suggest is driven by magnetised winds rather than turbulent viscosity. We study planet formation in magnetohydrodynamic (MHD) wind-driven…

Earth and Planetary Astrophysics · Physics 2026-01-07 Jesse Weder , Christoph Mordasini

Planets are formed from collisional growth of small bodies in a protoplanetary disk. Bodies much larger than approximately $1$\,m are mainly controlled by the gravity of the host star and experience weak gas drag; their orbits are mainly…

Earth and Planetary Astrophysics · Physics 2015-05-08 Hiroshi Kobayashi

According to the core-accretion scenario, planets form in protostellar disks through the condensation of dust, coagulation of planetesimals, and emergence of protoplanetary embryos. At a few AU in a minimum mass nebula, embryos' growth is…

Earth and Planetary Astrophysics · Physics 2015-06-23 Xiaojia Zhang , Beibei Liu , Douglas N. C. Lin , Hui Li

The processes of planet formation and migration depend intimately on the interaction between planetesimals and the gaseous disks in which they form. The formation of gaps in the disk can severely limit the mass of the planet and its…

Astrophysics · Physics 2009-11-07 Wayne F. Winters , Steven A. Balbus , John F. Hawley

This review is based on lectures given at the 45th Saas-Fee Advanced Course 'From Protoplanetary Disks to Planet Formation' held in March 2015 in Les Diablerets, Switzerland. Starting with an overview of the main characterictics of the…

Earth and Planetary Astrophysics · Physics 2017-07-25 Wilhelm Kley

To reproduce the orbits and masses of the terrestrial planets (analogs) of the solar system, most studies scrutinize simulations for success as a batch. However, there is insufficient discussion in the literature on the likelihood of…

Earth and Planetary Astrophysics · Physics 2019-10-09 Patryk Sofia Lykawka , Takashi Ito

Mars is likely to be a planetary embryo formed through collisions with planetesimals, which can explain its small mass and rapid formation timescale obtained from 182Hf-182$W chronometry. In the classical theory of planet formation, the…

Earth and Planetary Astrophysics · Physics 2015-06-15 Hiroshi Kobayashi , Nicolas Dauphas

In the conventional theory of planet formation, it is assumed that protoplanetary disks are axisymmetric and have a smooth radial profile. However, recent radio observations of protoplanetary disks have revealed that many of them have…

Earth and Planetary Astrophysics · Physics 2023-08-11 Tenri Jinno , Takayuki R. Saitoh , Yota Ishigaki , Junichiro Makino
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