Results 91 to 100 of about 2,563,330 (219)

Effects of Hot Oxygen Corona on Ion Escape From Venus‐Like Planets

Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.
Abstract Due to the lack of a significant planetary magnetic field, the upper atmospheres of Venus‐like planets interact directly with the stellar wind. Therefore, thermal atomic oxygen in the thermosphere and hot oxygen in the corona produced by non‐thermal processes in the upper atmosphere act as a source of ion pickup loss.
T. Nishioka, K. Seki, R. Sakata, N. Terada, S. Sakai, H. Shinagawa, A. Nakayama   +6 more
wiley   +1 more source

exoplanet-dev/jaxoplanet: Astronomical time series analysis with JAX

<h2>What's Changed</h2> <ul> <li>Updating and applying pre-commit by @dfm in https://github.com/exoplanet-dev/jaxoplanet/pull/16</li> <li>Adding interface for arbitrary order limb darkening by @dfm in https://github ...
Degen, David, Lionel Garcia, Jiayin Dong, Catriona Murray, Shashank Dholakia, Soichiro Hattori, Foreman-Mackey, Daniel   +6 more
core   +1 more source

A Giant Impact as the Likely Origin of Different Twins in the Kepler-107 Exoplanet System [PDF]

, 2019
Measures of exoplanet bulk densities indicate that small exoplanets with radius less than 3 Earth radii (R(sub )) range from low-density sub-Neptunes containing volatile elements to higher-density rocky planets with Earth-like or iron-rich (Mercury-like)
Affer, Laura, Mortier, Annelies, Collier Cameron, Andrew, Johnson, John A., Christensen-Dalsgaard, Joergen, Poretti, Ennio, Lopez, Eric, Justesen, Anders B., Kjeldsen, Hans, Latham, David W., Watson, Chris, BONOMO, ALDO STEFANO, Fiorenzano, Aldo F.M., Pepe, Francesco, Handberg, Rasmus, Mortier, Annelies; id_orcid, Mills, Sean M., CORSARO, ENRICO MARIA NICOLA, Aguirre, Victor Silva, Lund, Mikkel N., Mayor, Michel, Lopez-Morales, Mercedes, Zeng, Li, Leinhardt, Zoe M., Christensen-Dalsgaard, Jørgen, Fiorenzano, Aldo F. M., Bonomo, Aldo S., Denman, Thomas, Arentoft, Torben, Dressing, Courtney D., Silva Aguirre, Victor, Nava, Chantanelle, Piotto, Giampaolo, Lundkvist, Mia S., Rice, Ken, Rice, Ken; id_orcid, MICELA, Giuseppina, Ségransan, Damien, Micela, Giusi, Motalebi, Fatemeh, Molinari, Emilio, Corsaro, Enrico, Sasselov, Dimitar, Nascimbeni, Valerio, Lovis, Christophe, Figueira, Pedro, Damasso, Mario, Bouchy, François, Watson, Chris; id_orcid, Benbakoura, Mansour, Phillips, David F., Cameron, Andrew Collier, MOLINARI, Emilio Carlo, Malavolta, Luca, Harutyunyan, Avet, Cosentino, Rosario, Vanderburg, Andrew, Sozzetti, Alessandro, Buchhave, Lars A., García, Rafael A., Udry, Stéphane, Mathur, Savita, Dumusque, Xavier   +62 more
core   +1 more source

Lava World: Exoplanet Surfaces

, 2022
The recent first measurements of the reflection of the surface of a lava world provides an unprecedented opportunity to investigate different stages of rocky planet evolution.
Kaltenegger, Lisa, Megan E Holycross, Holycross, Megan E., Marc-Antoine Fortin, Fortin, Marc-Antoine, Gazel, Esteban, Esteban Gazel, Lisa Kaltenegger   +7 more
core   +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

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

Thermally Regulated Viscoelastic Tidal Migration of Eccentric Planets

The Astrophysical Journal Letters
A growing population of short-period Neptune-like planets has nonzero eccentricities and, in some cases, large stellar obliquities, suggestive of high-eccentricity migration. Modeling this evolution requires a prescription for tidal dissipation, which in
Cristobal Petrovich, Hareesh Gautham Bhaskar   +1 more
doaj   +1 more source

Metal-enriched Atmospheres in Warm (Super- and Sub-) Neptunes Induced by Extreme Atmospheric Escape

The Astrophysical Journal
Planet formation impacts exoplanet atmospheres by accreting metals in solid form, leading to atmospheric carbon-to-oxygen ratios (C/O) and sulfur-to-nitrogen ratios (S/N) that deviate from those of their host stars. Recent observations indicate differing
Amy J. Louca, Yamila Miguel
doaj   +1 more source

Stellar magnetic activity – Star-Planet Interactions

EPJ Web of Conferences, 2015
Stellar magnetic activity is an important factor in the formation and evolution of exoplanets. Magnetic phenomena like stellar flares, coronal mass ejections, and high-energy emission affect the exoplanetary atmosphere and its mass loss over time.
Poppenhaeger, K.
doaj   +1 more source

The coupled tidal evolution of the moons and spins of warm exoplanets

Astronomy & Astrophysics
Context. The Solar System giant planets harbor a wide variety of moons. Among them, the largest moons have moon-to-planet mass ratios of the order of 10 −4 . Moons around exoplanets are plausibly similarly abundant, even though most of them are likely too small to be ...
Yubo Su, Melaine Saillenfest
openaire   +2 more sources