Results 121 to 130 of about 17,015 (215)

Magma Ocean Interactions Can Explain JWST Observations of the Sub-Neptune TOI-270 d

The Astrophysical Journal
Sub-Neptunes with substantial atmospheres may possess magma oceans in contact with the overlying gas, with chemical interactions between the atmosphere and magma playing an important role in shaping atmospheric composition.
Matthew C. Nixon, R. Sander Somers, Arjun B. Savel, Jegug Ih, Eliza M.-R. Kempton, Edward D. Young, Hilke E. Schlichting, Tim Lichtenberg, Luis Welbanks, William Misener, Anjali A. A. Piette, Nicholas F. Wogan   +11 more
doaj   +1 more source

Constraints on the Orbit of the Young Substellar Companion GQ Lup B from High-resolution Spectroscopy and VLTI/GRAVITY Astrometry

The Astrophysical Journal
Understanding the orbits of giant planets is critical for testing planet formation models, particularly at wide separations (>10 au) where traditional core accretion becomes inefficient.
Vidya Venkatesan, S. Blunt, J. J. Wang, S. Lacour, G.-D. Marleau, G. A. L. Coleman, L. Guerrero, W. O. Balmer, L. Pueyo, T. Stolker, J. Kammerer, N. Pourré, M. Nowak, E. Rickman, A. Sivaramakrishnan, D. Sing, K. Wagner, A.-M. Lagrange, R. Abuter, A. Amorim, R. Asensio-Torres, J.-P. Berger, H. Beust, A. Boccaletti, M. Bonnefoy, H. Bonnet, M. S. Bordoni, G. Bourdarot, W. Brandner, F. Cantalloube, P. Caselli, B. Charnay, G. Chauvin, A. Chavez, A. Chomez, E. Choquet, V. Christiaens, Y. Clénet, V. Coudé du Foresto, A. Cridland, R. Davies, R. Dembet, J. Dexter, A. Drescher, G. Duvert, A. Eckart, F. Eisenhauer, N. M. Förster Schreiber, P. Garcia, R. Garcia Lopez, E. Gendron, R. Genzel, S. Gillessen, J. H. Girard, S. Grant, X. Haubois, G. Heissel, Th. Henning, S. Hinkley, S. Hippler, M. Houllé, Z. Hubert, L. Jocou, M. Keppler, P. Kervella, L. Kreidberg, N. T. Kurtovic, V. Lapeyrère, J.-B. Le Bouquin, D. Lutz, A.-L. Maire, F. Mang, A. Mérand, C. Mordasini, D. Mouillet, E. Nasedkin, T. Ott, G. P. P. L. Otten, C. Paladini, T. Paumard, K. Perraut, G. Perrin, S. Petrus, O. Pfuhl, D. C. Ribeiro, Z. Rustamkulov, J. Shangguan, T. Shimizu, A. Shields, J. Stadler, O. Straub, C. Straubmeier, E. Sturm, L. J. Tacconi, A. Vigan, F. Vincent, S. D. von Fellenberg, F. Widmann, T. O. Winterhalder, J. Woillez, S. Yazici, the ExoGRAVITY Collaboration   +101 more
doaj   +1 more source

Strong Fractionation of Deuterium and Helium in Sub-Neptune Atmospheres along the Radius Valley

The Astrophysical Journal
We simulate atmospheric fractionation in escaping planetary atmospheres using IsoFATE , a new open-source numerical model. We expand the parameter space studied previously to planets with tenuous atmospheres that exhibit the greatest helium and deuterium
Collin Cherubim, Robin Wordsworth, Renyu Hu, Evgenya Shkolnik   +3 more
doaj   +1 more source

Where Are the Water Worlds? Identifying Exo-water-worlds Using Models of Planet Formation and Atmospheric Evolution

The Astrophysical Journal
Planet formation models suggest that the small exoplanets that migrate from beyond the snowline of the protoplanetary disk likely contain water-ice-rich cores (∼50% by mass), also known as water worlds.
Aritra Chakrabarty, Gijs D. Mulders
doaj   +1 more source

Most Hot Jupiters Were Cool Giant Planets for More Than 1 Gyr

The Astronomical Journal
The origin of hot Jupiters is the oldest problem in exoplanet astrophysics. Hot Jupiters formed in situ or via disk migration should be in place just a few million years after the formation of their host stars.
Stephen P. Schmidt, Kevin C. Schlaufman
doaj   +1 more source

Formation of stars, substellar objects and exoplanets : Observations of multiplicity

, 2011
Many nearby stars are part of a binary or multiple system. Details about their history are preserved in their multiplicity characteristics, and observations of binary/multiple star systems provide a way to measure fundamental physical properties of the stars as well as clues to their formation and evolution.
openaire   +2 more sources

A Stellar magnesium to silicon ratio in the atmosphere of an exoplanet. [PDF]

Nat Commun
Sanchez JA, Smith PCB, Kanumalla K, Welbanks L, Line MR, Pelletier S, Desch S, Young P, Patience J, Bean J, Brogi M, Jaffe D, Mace GN, Mansfield MW, Panwar V, Parmentier V, Pino L, Savel AB, Sluijs LV, Wardenier JP.   +19 more
europepmc   +1 more source

Cloud formation in 3D exoplanet atmospheres

As result of formation and evolution processes, exoplanets can have very different properties, e.g. giant gas planets, rocky planets, mini-neptunes and possibly carbon-rich planets. The understanding of these objects is, to a large extent, hampered by clouds obscuring their atmospheres. Clouds play a key role for the atmospheric dynamics and chemistry,
openaire   +1 more source

Exo-Geoscience Perspectives Beyond Habitability. [PDF]

Space Sci Rev
Spohn T, Roberge A, Way MJ, Duarte JC, Miozzi F, Baumeister P, Byrne P, Lineweaver CH.   +7 more
europepmc   +1 more source

Fundamentals of Interior Modelling and Challenges in the Interpretation of Observed Rocky Exoplanets. [PDF]

Space Sci Rev
Baumeister P, Miozzi F, Guimond CM, Steinmeyer ML, Dorn C, Karato SI, Bolmont É, Revol A, Thamm A, Noack L.   +9 more
europepmc   +1 more source