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Recent observational findings have suggested a positive correlation between the occurrence rates of inner super-Earths and outer giant planets. These results raise the question of whether this trend can be reproduced and explained by planet…

Earth and Planetary Astrophysics · Physics 2021-12-08 M. Schlecker , C. Mordasini , A. Emsenhuber , H. Klahr , Th. Henning , R. Burn , Y. Alibert , W. Benz

We analyze the formation and evolution of terrestrial-like planets around solar-type stars in the absence of gaseous giants. In particular, we focus on the physical and dynamical properties of those that survive in the system's Habitable…

Earth and Planetary Astrophysics · Physics 2020-09-23 Agustín Dugaro , Gonzalo C. de Elía , Luciano A. Darriba

Stellar perturbations affect planet-formation in binary systems. Recent studies show that the planet-formation stage of mutual accretion of km-sized planetesimals is most sensitive to binary effects. In this paper, the condition for…

Earth and Planetary Astrophysics · Physics 2015-05-18 Ji-Wei Xie , Ji-Lin Zhou , Jian Ge

We present the results of an extensive study of the final stage of terrestrial planet formation in disks with different surface density profiles and for different orbits of Jupiter and Saturn. We carried out simulations for disk densities…

Earth and Planetary Astrophysics · Physics 2016-01-20 Nader Haghighipour , Othon C. Winter

Advances in computing power and numerical methodologies over the past several decades sparked a prolific output of dynamical investigations of the late stages of terrestrial planet formation. Among other peculiar inner solar system…

Earth and Planetary Astrophysics · Physics 2022-10-12 Matthew S. Clement , Rogerio Deienno , Andre Izidoro

Measurements of accretion rates onto planetary mass objects may distinguish between different planet formation mechanisms, which predict different accretion histories. In this Letter, we use \HST/WFC3 UVIS optical photometry to measure…

Solar and Stellar Astrophysics · Physics 2015-06-18 Yifan Zhou , Gregory J. Herczeg , Adam L. Kraus , Stanimir Metchev , Kelle Cruz

In the core-accretion formation scenario of gas giants, most of the gas accreting onto a planet is processed through an accretion shock. In this series of papers we study this shock since it is key in setting the forming planet's structure…

Earth and Planetary Astrophysics · Physics 2019-09-04 Gabriel-Dominique Marleau , Christoph Mordasini , Rolf Kuiper

We present a fragmentation module and a composition tracking code for the $n$-body code REBOUND. Our fragmentation code utilises previous semi-analytic models and follows an implementation method similar to fragmentation for the $n$-body…

Earth and Planetary Astrophysics · Physics 2022-02-09 Anna C. Childs , Jason H. Steffen

Super-Earths are found in tighter orbits than the Earth's around more than one third of main sequence stars. It has been proposed that super-Earths are scaled-up terrestrial planets that formed similarly, through mutual accretion of…

Earth and Planetary Astrophysics · Physics 2019-07-10 Michiel Lambrechts , Alessandro Morbidelli , Seth A. Jacobson , Anders Johansen , Bertram Bitsch , Andre Izidoro , Sean N. Raymond

We explore the growth of planetary embryos by planetesimal accretion up to and beyond the point where pebble accretion becomes efficient at the so-called Hill-transition mass. Both the transition mass and the characteristic mass of…

Earth and Planetary Astrophysics · Physics 2022-10-19 Sebastian Lorek , Anders Johansen

The planetary mass-radius diagram is an observational result of central importance to understand planet formation. We present an updated version of our planet formation model based on the core accretion paradigm which allows to calculate…

Earth and Planetary Astrophysics · Physics 2015-05-27 C. Mordasini , Y. Alibert , W. Benz , H. Klahr

Context: Internal chemical mixing in intermediate- and high-mass stars represents an immense uncertainty in stellar evolution models.In addition to extending the main-sequence lifetime, chemical mixing also appreciably increases the mass of…

Solar and Stellar Astrophysics · Physics 2021-11-10 Cole Johnston

Models of planet formation have shown that giant planets have a large impact on the number, masses and orbits of terrestrial planets that form. In addition, they play an important role in delivering volatiles from material that formed…

Earth and Planetary Astrophysics · Physics 2015-06-19 Elisa V. Quintana , Jack J. Lissauer

We have investigated the problem of the distribution of both masses and orbital radii of planets resulting from the gas-accretion, gas-capture model. First we followed the evolution of gas and solids from the moment where all solids are in…

Astrophysics · Physics 2009-11-11 Kacper Kornet , Sebastian Wolf

Pebbles of millimeter sizes are abundant in protoplanetary discs around young stars. Chondrules inside primitive meteorites - formed by melting of dust aggregate pebbles or in impacts between planetesimals - have similar sizes. The role of…

Earth and Planetary Astrophysics · Physics 2021-02-18 Anders Johansen , Thomas Ronnet , Martin Bizzarro , Martin Schiller , Michiel Lambrechts , Åke Nordlund , Helmut Lammer

Earth-mass bodies are expected to undergo Type I migration directed either inward or outward depending on the thermodynamical state of the protoplanetary disc. Zones of convergent migration exist where the Type I torque cancels out. We…

Earth and Planetary Astrophysics · Physics 2015-06-16 Arnaud Pierens , Christophe Cossou , Sean Raymond

The conditions in the protoplanetary disc are determinant for the various planet formation mechanisms. We present a framework which combines self-consistent disc structures with the calculations of the growth rates of planetary embryos via…

Earth and Planetary Astrophysics · Physics 2021-06-23 Sofia Savvidou , Bertram Bitsch

Compact binaries have long been a paradigm for accretion theory. Much of our present view of how accretion occurs comes directly from the comparison of theory with observations of these sources. Since theory differs little for other objects…

Astrophysics · Physics 2007-05-23 Andrew R. King

In the classical core-accretion planet formation scenario, rapid inward migration and accretion timescales of kilometer size planetesimals may not favor the formation of massive cores of giant planets before the dissipation of…

Earth and Planetary Astrophysics · Physics 2017-07-26 O. M. Guilera , Zs. Sándor

The primary epoch of planetary accretion concludes with giant impacts - highly energetic collisions between proto-planets that can play a key role in shaping a planet's inventory of volatile elements. Previous work has shown that single…

Earth and Planetary Astrophysics · Physics 2025-05-14 Matthew J. Roche , Simon J. Lock , Jingyao Dou , Philip J. Carter , Jacob A. Kegerreis , Zoë M. Leinhardt
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