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Advances in infrared and submillimeter technology have allowed for detailed observations of the molecular content of the planet-forming regions of protoplanetary disks. In particular, disks around solar-type stars now have growing molecular…

Earth and Planetary Astrophysics · Physics 2014-06-06 Klaus M. Pontoppidan , Sandra M. Blevins

In an attempt to select stars that can host planets with characteristics similar to our own, we selected seven solar-type stars known to host planets in the habitable zone and for which spectroscopic stellar parameters are available. For…

Earth and Planetary Astrophysics · Physics 2017-10-23 V. Adibekyan , P. Figueira , N. C. Santos

Interior compositions are key for our understanding of Earth-like exoplanets. The composition of the core can influence the presence of a magnetic dynamo and the strength of gravity on the planetary surface, both of which heavily impact…

Planets form from the same cloud of molecular gas and dust as their host stars. Confirming if planetary bodies acquire the same refractory element composition as their natal disc during formation, and how efficiently volatile elements are…

Solar and Stellar Astrophysics · Physics 2025-01-08 Claudia Aguilera-Gómez , Laura K. Rogers , Amy Bonsor , Paula Jofré , Simon Blouin , Oliver Shorttle , Andrew M. Buchan , Yuqi Li , Siyi Xu

One of the outstanding goals of the planetary science community is to measure the present-day atmospheric composition of planets and link this back to formation. As giant planets are formed by accreting gas, ices, and rocks, constraining…

Chemical and chronological information preserved in meteorites permits the reconstruction of events and processes in the solar nebula from the formation of the first solids to the accretion of planetary bodies and their subsequent…

Earth and Planetary Astrophysics · Physics 2026-04-14 Klaus Mezger , Jonas Pape , Aryavart Anand , Pascal M. Kruttasch , Hauke Vollstaedt , Jan Hoffmann

The chemical composition of exoplanets is thought to be influenced by the composition of the disks in which they form. JWST observations have unveiled a variety of species in numerous nearby disks, showing significant variations in the C/O…

The compositions of nascent planets depend on the compositions of their birth disks. In particular, the elemental compositions of Gas Giant gaseous envelopes depend on the elemental composition of the disk gas from which the envelope is…

Astrophysics of Galaxies · Physics 2016-11-15 Karin I. Oberg , Edwin A. Bergin

The giant planet-metallicity correlation revealed that planetary formation depends on the stellar properties. There is growing evidence that it is also valid for smaller hot planets, but it is not clear whether elements other than iron also…

Earth and Planetary Astrophysics · Physics 2026-02-20 Luan Ghezzi , Ellen Costa-Almeida , Verónica Loaiza-Tacuri , Katia Cunha

Elemental abundances, particularly the C/O ratio, are seen as a way to connect the composition of planetary atmospheres with planet formation scenario and the disc chemical environment. We model the chemical composition of gas and ices in a…

Earth and Planetary Astrophysics · Physics 2025-01-15 Tamara Molyarova , Eduard Vorobyov , Vitaly Akimkin

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

Characterizing the atmospheres of extrasolar planets is the new frontier in exoplanetary science. The last two decades of exoplanet discoveries have revealed that exoplanets are very common and extremely diverse in their orbital and bulk…

Earth and Planetary Astrophysics · Physics 2016-06-01 Nikku Madhusudhan , Marcelino Agúndez , Julianne I. Moses , Yongyun Hu

Knowledge of the composition of material that will form planets is crucial to understand planetary diversity and the occurrence of potentially habitable planets. Ultimately, it is the chemistry in circumstellar disks that determines the…

Earth and Planetary Astrophysics · Physics 2024-10-31 Merel L. R. van 't Hoff , Jennifer B. Bergner

Nine extrasolar planets with masses between 110 and 430M are known to transit their star. The knowledge of their masses and radii allows an estimate of their composition, but uncertainties on equations of state, opacities and possible…

No terrestrial planet formation simulation completed to date has considered the detailed chemical composition of the planets produced. While many have considered possible water contents and late veneer compositions, none have examined the…

Earth and Planetary Astrophysics · Physics 2012-01-11 Jade C. Bond , Dante S. Lauretta , David P. O'Brien

Ice-rich planets are formed exterior to the water ice-line and thus are expected to contain a substantial amount of ices. The high ice content leads to unique conditions in the interior, under which the structure of a planet is affected by…

Earth and Planetary Astrophysics · Physics 2022-03-09 Allona Vazan , Re'em Sari , Ronit Kessel

Atmospheric composition of exoplanets is often considered as a probe of the planet's formation condition. How exactly the initial chemical memory may be altered from the birth to the final state of the planet, however, remains unknown.…

Earth and Planetary Astrophysics · Physics 2024-10-08 Emilia Vlahos , Yayaati Chachan , Vincent Savignac , Eve J. Lee

As stellar compositions evolve over time in the Milky Way, so will the resulting planet populations. In order to place planet formation in the context of Galactic chemical evolution, we make use of a large ($N = 5\,325$) stellar sample…

Earth and Planetary Astrophysics · Physics 2023-10-11 Jesper Nielsen , Matthew Raymond Gent , Maria Bergemann , Philipp Eitner , Anders Johansen

The atmospheric C/O ratio of exoplanets is widely used to constrain their formation. To guarantee that the C/O ratio provides robust information, we need to accurately quantify the amount of C and O in exoplanetary atmospheres. In the case…

Earth and Planetary Astrophysics · Physics 2023-02-08 S. Fonte , D. Turrini , E. Pacetti , E. Schisano , S. Molinari , D. Polychroni , R. Politi , Q. Changeat

Aims: The secondary atmospheres of terrestrial planets form and evolve as a consequence of interaction with the interior over geological time. We aim to quantify the influence of planetary bulk composition on the interior--atmosphere…

Earth and Planetary Astrophysics · Physics 2020-11-04 Rob J. Spaargaren , Maxim D. Ballmer , Dan J. Bower , Caroline Dorn , Paul J. Tackley
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