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We study the evolution of a system consisting of two protoplanets still embedded in a protoplanetary disk. Results of two different numerical approaches are presented. In the first kind of model the motion of the disk material is followed…

Astrophysics · Physics 2023-07-19 Willy Kley

Planets and their atmospheres are built from gas and solid material in protoplanetary disks. Recent results suggest that solid material like pebbles may contribute significantly to building up planetary atmospheres. In order to link…

Earth and Planetary Astrophysics · Physics 2022-12-14 Christian Eistrup , Thomas Henning

In this chapter we outline some of the basic understanding of the chemistry that accompanies planet formation. We discuss the basic physical environment which dictates the dominant chemical kinetic pathways for molecule formation. We focus…

Earth and Planetary Astrophysics · Physics 2018-12-05 Edwin A. Bergin , L. Ilsedore Cleeves

Planets form in disks of gas and dust around young stars. The disk molecular reservoirs and their chemical evolution affect all aspects of planet formation, from the coagulation of dust grains into pebbles, to the elemental and molecular…

Earth and Planetary Astrophysics · Physics 2023-09-13 Karin I. Öberg , Stefano Facchini , Dana E. Anderson

The interplay between stellar multiplicity and protoplanetary discs represents a cornerstone of modern astrophysics, offering key insights into the processes of planet formation. Protoplanetary discs act as cradles for planetary systems,…

Earth and Planetary Astrophysics · Physics 2025-02-03 Nicolás Cuello , Antoine Alaguero , Pedro P. Poblete

Detailed models of galactic disk formation and evolution require knowledge about the initial conditions under which disk galaxies form, the boundary conditions that affect their secular evolution and the micro-physical processes that drive…

Astrophysics · Physics 2015-05-13 Andreas Burkert

In this work, we develop a rocky planet interior model and use it to investigate the evolution of catastrophically evaporating rocky exoplanets. These planets, detected through the dust tails produced by evaporative outflows from their…

Earth and Planetary Astrophysics · Physics 2024-01-24 Alfred Curry , Richard Booth , James E. Owen , Subhanjoy Mohanty

The fates of planetary systems provide unassailable insights into their formation and represent rich cross-disciplinary dynamical laboratories. Mounting observations of post-main-sequence planetary systems necessitate a complementary level…

Earth and Planetary Astrophysics · Physics 2016-01-22 Dimitri Veras

The presence of highly eccentric extrasolar planets in binary stellar systems suggests that the Kozai effect has played an important role in shaping their dynamical architectures. However, the formation of planets in inclined binary systems…

Earth and Planetary Astrophysics · Physics 2015-05-28 Konstantin Batygin , Alessandro Morbidelli , Kleomenis Tsiganis

Much of a planet's composition could be determined right at the onset of formation. Laboratory experiments can constrain these early steps. This includes static tensile strength measurements or collisions carried out under Earth's gravity…

Earth and Planetary Astrophysics · Physics 2018-08-31 Gerhard Wurm

Gas-giant exoplanets are test cases for theories of planet formation as their atmospheres are proposed to carry signatures of their formation within the protoplanetary disk. The metallicity and C/O are key diagnostics, allowing to…

Earth and Planetary Astrophysics · Physics 2025-08-14 Catherine Walsh

No matter how fascinating and exotic other terrestrial planets are revealed to be, nothing generates more excitement than announcements regarding their habitability. From the observation of Mars to present-day efforts toward Venus and the…

Earth and Planetary Astrophysics · Physics 2024-03-27 Cedric Gillmann , Kaustubh Hakim , Diogo Lourenco , Sascha P. Quanz , Paolo A. Sossi

Observations of circumstellar disks around stars as a function of stellar properties such as mass, metallicity, multiplicity, and age, provide constraints on theories concerning the formation and evolution of planetary systems. Utilizing…

Earth and Planetary Astrophysics · Physics 2015-05-13 Michael R. Meyer

The discovery of now about 20 extrasolar planets orbiting solar-type stars with properties quite different from those in our Solar System has raised many questions about the formation and evolution of planets. The tidal interaction between…

Astrophysics · Physics 2007-05-23 Willy Kley

Because of their common origin, it was assumed that the composition of planet building blocks should, to a first order, correlate with stellar atmospheric composition, especially for refractory elements. In fact, information on the relative…

The habitability of the surface of any planet is determined by a complex evolution of its interior, surface, and atmosphere. The electromagnetic and particle radiation of stars drive thermal, chemical and physical alteration of planetary…

Studies of planet migration derived from disc planet interactions began before the discovery of exoplanets. The potential importance of migration for determining orbital architectures being realised, the field received greater attention…

Earth and Planetary Astrophysics · Physics 2021-12-15 J. C. B. Papaloizou

Exoplanet observations have shown that the occurrence and orbital architectures of close-in super-Earths and sub-Neptunes are shaped by the presence of outer gas giant planets. This influence may emerge during the formation stage or from…

Earth and Planetary Astrophysics · Physics 2025-09-04 Marcela Best , Antranik A. Sefilian , Carolina Charalambous , Kedron Silsbee , Cristobal Petrovich

Terrestrial planets formed within gaseous protoplanetary disks can accumulate significant hydrogen envelopes. The evolution of such an atmosphere due to XUV driven evaporation depends on the activity evolution of the host star, which itself…

Earth and Planetary Astrophysics · Physics 2016-08-06 C. P. Johnstone , M. Güdel , A. Stökl , H. Lammer , L. Tu , K. G. Kislyakova , T. Lüftinger , P. Odert , N. V. Erkaev , E. A. Dorfi

Massive giant planets, such as the ones being discovered by direct imaging surveys, likely experience the majority of their growth through a circumplanetary disc. We argue that the entropy of accreted material is determined by boundary…

Earth and Planetary Astrophysics · Physics 2016-03-16 James E. Owen , Kristen Menou
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