Results 81 to 90 of about 7,182,538 (218)

JWST-TST DREAMS: Nonuniform Dayside Emission for WASP-17b from MIRI/LRS

The Astronomical Journal
We present the first spectroscopic characterization of the dayside atmosphere of WASP-17b in the mid-infrared using a single JWST MIRI/LRS eclipse observation.
Daniel Valentine, Hannah R. Wakeford, Ryan C. Challener, Natasha E. Batalha, Nikole K. Lewis, David Grant, Elijah Mullens, Lili Alderson, Jayesh Goyal, Ryan J. MacDonald, Erin M. May, Sara Seager, Kevin B. Stevenson, Jeff A. Valenti, Natalie H. Allen, Néstor Espinoza, Ana Glidden, Amélie Gressier, Jingcheng Huang, Zifan Lin, Douglas Long, Dana R. Louie, Mark Clampin, Marshall Perrin, Roeland P. van der Marel, C. Matt Mountain   +25 more
doaj   +1 more source

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

Peas-in-a-pod across the Radius Valley: Rocky Systems Are Less Uniform in Mass but More Uniform in Size and Spacing

The Astrophysical Journal Letters
The ubiquity of “peas-in-a-pod” architectural patterns and the existence of the radius valley each presents a striking population-level trend for planets with R _p ≤ 4 R _⊕ that serves to place powerful constraints on the formation and evolution of these
Armaan V. Goyal, Songhu Wang
doaj   +1 more source

Search for circum-planetary material and orbital period variations of short-period Kepler exoplanet candidates

, 2014
A unique short-period (P = 0.65356(1) d) Mercury-size Kepler exoplanet candidate KIC012557548b has been discovered recently by Rappaport et al. (2012).
Zhou, Guyin (George), Budaj, Jan, Garai, Z., Stellingwerf, R. F., Zhou, G., Garai, Zoltán, Budaj, J.   +6 more
core   +1 more source

Coupled Planetary Interior and Tidal Evolution

The Astrophysical Journal
We present a new planetary structure/thermal evolution model, designed for use in problems that couple orbital dynamics with planetary structure. We first benchmark our structural/thermal evolution calculations against the MESA stellar evolution code ...
Tim Hallatt, Sarah Millholland
doaj   +1 more source

Machine learning approaches for exoplanet detection.

, 2022
Machine learning approaches for exoplanet detection.
Sara Cuéllar (12634749), Paulo Granados (12634752), Gonzalo Farias (12634767), Héctor Vargas (12634761), Michel Curé (12634758), Sebastián Dormido-Canto (12634764), Ernesto Fabregas (12634755)   +6 more
core   +1 more source

Do Super-puffs Defy Core Accretion? Population-wide Interior Structure Constraints

The Astrophysical Journal
Sub-Saturn mass planets with extremely low bulk densities ( ρ  ≲ 0.3 g cm ^−3 ), or “super-puffs,” are one of the most interesting and least understood populations of exoplanets.
Nicholas T. Marston, Juliette Becker, Alex R. Howe   +2 more
doaj   +1 more source

Terrestrial Exoplanet Internal Structure Constraints Enabled by Comprehensive Host Star Characterization Reveal That Terrestrial Planets in Mean Motion Resonances Are Water Rich

The Astrophysical Journal
Exoplanet mass and radius inferences fundamentally rely on host star mass and radius inferences. Despite the importance of host star mass, radius, and elemental abundance inferences for the derivation of exoplanet internal structure constraints ...
Alejandra Ross, Henrique Reggiani, Kevin C. Schlaufman, Mykhaylo Plotnykov, Diana Valencia   +4 more
doaj   +1 more source

Towards a Theory for the Atmospheres, Structure, and Evolution of Giant Exoplanets [PDF]

Proceedings of the International Astronomical Union, 2011
AbstractIn this short review, I summarize some of the salient features of the emerging theory of exoplanets in general, and of giant exoplanets in particular. A focus is on the characterization of transiting planets at primary and secondary eclipse, but various other related topics are covered, if only briefly.
openaire   +1 more source

Exoplanet atmospheres: A theoretical outlook

, 2010
With over two dozen exoplanet atmospheres observed today, the field of exoplanet atmospheres is solidly established. The highlights of exoplanet atmosphere studies include: detection of molecular spectral features; constraints on atmospheric vertical ...
Sara Seager
core   +1 more source