Results 91 to 100 of about 8,194 (235)

Breaking Giant Chains: Early-stage Instabilities in Long-period Giant Planet Systems

The Astrophysical Journal
Orbital evolution is a critical process that sculpts planetary systems, particularly during their early stages where planet–disk interactions are expected to lead to the formation of resonant chains.
Vighnesh Nagpal, Max Goldberg, Konstantin Batygin   +2 more
doaj   +1 more source

Classification of Planetary Motion around Super-Jupiters and Brown Dwarfs

Universe
We investigate the orbital dynamics of an exosystem consisting of a solar-mass host star, a transiting body, and an Earth-size exoplanet within the framework of the generalized three-body problem.
Euaggelos E. Zotos, Eman M. Moneer, Tobias C. Hinse   +2 more
doaj   +1 more source

Surrounded by Giants: Habitable Zone Stability Within the HD 141399 System

The Astronomical Journal, 2023
The search for exoplanets has revealed a diversity of planetary system architectures, the vast majority of which diverge significantly from the template of the solar system.
Stephen R. Kane
doaj   +1 more source

Illusion and Reality in the Atmospheres of Exoplanets

, 2017
The atmospheres of exoplanets reveal all their properties beyond mass, radius, and orbit. Based on bulk densities, we know that exoplanets larger than 1.5 Earth radii must have gaseous envelopes, hence atmospheres.
Adams, Anglada-Escude, Atreya, Bean, Beichman, Benneke, Berdyugina, Birkby, Bott, Brewer, Brogi, Brogi, Burrows, Cash, Charbonneau, Charbonneau, Charbonneau, Charbonneau, Chilcote, Collier-Cameron, Cowan, Cowan, Cowan, Cowan, Cowan, Crossfield, Crossfield, Crossfield, Crouzet, Crouzet, Currie, Deming, Deming, Deming, Deming, Deming, Demory, Demory, Demory, Demory, Des Marais, Diamond-Lowe, Ehrenreich, Elkins-Tanton, Esteves, Evans, Ford, Fortney, Fortney, Fraine, Gandolfi, Garcia Munoz, Gibson, Greene, Grillmair, Guillot, Hansen, Haynes, Helling, Heng, Heng, Heng, Henry, Hui, Huitson, Huitson, Hunten, Ingalls, Ingraham, Jensen, Kataria, Kipping, Knutson, Knutson, Knutson, Knutson, Knutson, Konopacky, Kreidberg, Kreidberg, Kreidberg, Lammer, Laughlin, Lewis, Lewis, Line, Line, Line, Lockwood, Lodders, Lopez, Lovis, Machalek, Macintosh, Madhusudhan, Madhusudhan, Madhusudhan, Madhusudhan, Majeau, Mandell, Marley, Marley, Marois, Masuda, Maxted, Mayor, McCullough, Miller-Ricci, Misra, Morris, Nikolov, Nikolov, Nikolov, Nymeyer, Oberg, Parmentier, Perez-Becker, Rajan, Redfield, Rogers, Rowe, Schaefer, Schaefer, Schaefer, Schwartz, Seager, Seager, Seager, Seager, Seager, Seager, Seager, Seager, Sheets, Showman, Sidis, Sing, Sing, Sing, Snellen, Snellen, Snellen, Spitzer, Stevenson, Stevenson, Sudarsky, Swain, Swift, Tinetti, Todorov, Todorov, Triaud, Vidal-Madjar, Vidal-Madjar, Wakeford, Wakeford, Waldmann, Wiedemann, Wiktorowicz, Wiktorowicz, Wilson, Wit, Wit, Wit, Wong, Wong, Wordsworth, Zellem, Zhao, Zhou   +169 more
core   +1 more source

MESSENGER Observations of a Possible Alfvén Wing at Mercury Driven by a Low Alfvénic Mach Number Interplanetary Coronal Mass Ejection

Journal of Geophysical Research: Space Physics, Volume 130, Issue 3, March 2025.
Abstract We investigate Mercury's response to rare, low Alfvénic Mach number MA $\left({M}_{A}\right)$ solar wind conditions using observations from the Mercury Surface, Space Environment, Geochemistry, and Ranging (MESSENGER) mission. This study provides compelling evidence of Mercury's altered magnetospheric state under these extreme conditions ...
Charles F. Bowers, Caitríona M. Jackman, Xianzhe Jia, James A. Slavin, Joachim Saur, Mika K. G. Holmberg, Ryan M. Dewey, Daniel Heyner, Filip Elekes, Lina Z. Hadid, Benoit Lavraud, Yang Wang, Hans L. F. Huybrighs, Matthew J. Rutala, Alexandra R. Fogg, Stephenie Brophy Lee, Daragh M. Hollman   +16 more
wiley   +1 more source

Investigating the Origins of Hot Neptunes from Radial Velocity Data

The Astronomical Journal
Hot Neptunes are extrasolar planets that are similar in size to Neptune in our solar system but are much closer to their host stars, completing an orbit in 10 days or less. The origin of hot Neptunes is not fully understood.
Sophie Y. Zheng
doaj   +1 more source

New Frontiers for Terrestrial-sized to Neptune-sized Exoplanets In the Era of Extremely Large Telescopes [PDF]

, 2019
Surveys reveal that terrestrial- to Neptune-sized planets (1 $< R
Boss, Alan, Close, Laird, Currie, Thayne, Dragomir, Diana, Fortney, Jonathan, Gaidos, Eric, Hasegawa, Yasuhiro, Kitiashvili, Irina, Konopacky, Quinn, Lee, Chien-Hsiu, Lewis, Nikole K., Liu, Michael, Lopez-Morales, Mercedes, Lupu, Roxana, Mawet, Dimitri, Melis, Carl, Meyer, Michael R., Morley, Caroline V., Packham, Chris, Peretz, Eliad, Skemer, Andy, Ulmer, Mel, Wang, Ji   +22 more
core   +1 more source

Radiative braking in the extended exosphere of GJ436b

, 2015
The recent detection of a giant exosphere surrounding the warm Neptune GJ436 b has shed new light on the evaporation of close-in planets, revealing that moderately irradiated, low-mass exoplanets could make exceptional targets for studying this mechanism
Bourrier, Vincent, Ehrenreich, David, Etangs, Alain Lecavelier des   +2 more
core   +2 more sources

Superhabitable Planets Around Mid‐Type K Dwarf Stars Enhance Simulated JWST Observability and Surface Habitability

Astronomische Nachrichten, Volume 346, Issue 2, February 2025.
ABSTRACT In our search for life beyond the Solar System, certain planetary bodies may be more conducive to life than Earth. However, the observability of these “superhabitable” (SH) planets in the habitable zones around K dwarf stars has not been fully modeled. This study addresses this gap by modeling the atmospheres of SH exoplanets.
Iva Vilović, Jayesh Goyal, René Heller, Fanny Marie von Schauenburg   +3 more
wiley   +1 more source

The Prevalence of Resonance Among Young, Close-in Planets

The Astronomical Journal
Multiple planets undergoing disk migration may be captured into a chain of mean-motion resonances with the innermost planet parked near the disk’s inner edge.
Fei Dai, Max Goldberg, Konstantin Batygin, Jennifer van Saders, Eugene Chiang, Nick Choksi, Rixin Li, Erik A. Petigura, Gregory J. Gilbert, Sarah C. Millholland, Yuan-Zhe Dai, Luke Bouma, Lauren M. Weiss, Joshua N. Winn   +13 more
doaj   +1 more source