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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

Observations in the past decade have revealed extrasolar planets with a wide range of orbital semimajor axes and eccentricities. Based on the present understanding of planet formation via core accretion and oligarchic growth, we expect that…

Astrophysics · Physics 2008-12-18 Sourav Chatterjee , Eric B. Ford , Soko Matsumura , Frederic A. Rasio

We aim to investigate the influence of the eccentricity and inclination damping due to planet-disc interactions on the final configurations of the systems, generalizing previous studies on the combined action of the gas disc and…

Earth and Planetary Astrophysics · Physics 2016-12-09 Sotiris Sotiriadis , Anne-Sophie Libert , Bertram Bitsch , Aurélien Crida

During the late stage of planet formation when Mars-size cores appear, interactions among planetary cores can excite their orbital eccentricities, speed their merges and thus sculpture the final architecture of planet systems. This series…

Earth and Planetary Astrophysics · Physics 2015-03-13 Huigen Liu , Ji-lin Zhou , S. Wang

Gravitational scattering between massive planets has been invoked to explain the eccentricity distribution of extrasolar planets. For scattering to occur, the planets must either form in -- or migrate into -- an unstable configuration. In…

Astrophysics · Physics 2009-11-13 Nickolas Moeckel , Sean N. Raymond , Philip J. Armitage

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 final "giant-impact" phase of terrestrial planet formation is believed to begin with a large number of planetary "embryos" on nearly circular, coplanar orbits. Mutual gravitational interactions gradually excite their eccentricities…

Earth and Planetary Astrophysics · Physics 2015-07-15 Scott Tremaine

Approximately half of the planets discovered by NASA's Kepler mission are in systems where just a single planet transits its host star, and the remaining planets are observed to be in multi-planet systems. Recent analyses have reported a…

Earth and Planetary Astrophysics · Physics 2020-10-07 Sanson T. S. Poon , Richard P. Nelson

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

Observations of the population of cold Jupiter planets ($r>$1 AU) show that nearly all of these planets orbit their host star on eccentric orbits. For planets up to a few Jupiter masses, eccentric orbits are thought to be the outcome of…

Earth and Planetary Astrophysics · Physics 2020-11-04 Bertram Bitsch , Trifon Trifonov , Andre Izidoro

Evidence of mutually inclined planetary orbits has been reported for giant planets these last years. Here we aim to study the impact of eccentric and inclined massive giant planets on the terrestrial planet formation process, and…

Earth and Planetary Astrophysics · Physics 2018-06-06 Sotiris Sotiriadis , Anne-Sophie Libert , Sean N. Raymond

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

Astrophysics · Physics 2007-05-23 Eric B. Ford , Frederic A. Rasio , Kenneth Yu

Super-Earths and mini-Neptunes exhibit great diversity in their compositional and orbital properties. Their bulk densities span a large range, from those dense enough to be purely rocky to those needing a substantial contribution from…

Earth and Planetary Astrophysics · Physics 2020-03-11 Mariah G. MacDonald , Rebekah I. Dawson , Sarah J. Morrison , Eve J. Lee , Arjun Khandelwal

The large eccentricities of many giant extrasolar planets may represent the endpoint of gravitational scattering in initially more crowded systems. If so, the early evolution of the giant planets is likely to be more restrictive of…

Astrophysics · Physics 2009-11-11 Dimitri Veras , Philip J. Armitage

As gas giant planets evolve, they may scatter other planets far from their original orbits to produce hot Jupiters or rogue planets that are not gravitationally bound to any star. Here, we consider planets cast out to large orbital…

Earth and Planetary Astrophysics · Physics 2015-06-23 Benjamin C. Bromley , Scott J. Kenyon

The orbital eccentricity distribution of exoplanets is shaped by a combination of dynamical processes, reflecting both formation conditions and long-term evolution. Probing the orbital dynamics of planets in the kinematic thin and thick…

In most extrasolar planetary systems, the present orbits of known giant planets admit the existence of stable terrestrial planets. Those same giant planets, however, have typically eccentric orbits that hint at violent early dynamics less…

Astrophysics · Physics 2009-11-10 Dimitri Veras , Philip J. Armitage

Recent discoveries of extrasolar planets at small orbital radii, or with significant eccentricities, indicate that interactions between massive planets and the disks of gas and dust from which they formed are vital for determining the final…

Astrophysics · Physics 2009-10-31 Philip J. Armitage , Brad M. S. Hansen

Many exoplanets in close-in orbits are observed to have relatively high eccentricities and large stellar obliquities. We explore the possibility that these result from planet-planet scattering by studying the dynamical outcomes from a large…

Earth and Planetary Astrophysics · Physics 2014-04-24 Cristobal Petrovich , Scott Tremaine , Roman R. Rafikov

(Abridged) In planetary systems with two or more giant planets, dynamical instabilities can lead to collisions or ejections through strong planet--planet scattering. Previous studies for simple initial configurations with two equal-mass…

Astrophysics · Physics 2008-12-18 Eric B. Ford , Frederic A. Rasio
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