Results 111 to 120 of about 15,442 (228)

ATMOSPHERE EXPANSION AND MASS LOSS OF CLOSE-ORBIT GIANT EXOPLANETS HEATED BY STELLAR XUV. II. EFFECTS OF PLANETARY MAGNETIC FIELD; STRUCTURING OF INNER MAGNETOSPHERE [PDF]

, 2015
M. L. Khodachenko, I. F. Shaikhislamov, H. Lammer, P. A. Prokopov   +3 more
openalex   +1 more source

JWST Transmission Spectroscopy of HD 209458b: A Supersolar Metallicity, a Very Low C/O, and No Evidence of CH4, HCN, or C2H2

The Astrophysical Journal Letters
We present the transmission spectrum of the original transiting hot Jupiter HD 209458b from 2.3 to 5.1 μ m as observed with the NIRCam instrument on the James Webb Space Telescope (JWST). Previous studies of HD 209458b’s atmosphere have given conflicting
Qiao Xue, Jacob L. Bean, Michael Zhang, Luis Welbanks, Jonathan Lunine, Prune August   +5 more
doaj   +1 more source

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

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

Impact of Heavy Ions on the Structure of Current Sheets in the Gravity Field of Exoplanets and Stars [PDF]

, 2023
Roman Kislov, H. V. Malova, Olga Khabarova, Л. М. Зеленый, Uliana Antsiferova   +4 more
openalex   +1 more source

The Importance of Optical Wavelength Data on Atmospheric Retrievals of Exoplanet Transmission Spectra

The Astronomical Journal
Exoplanet transmission spectra provide rich information about the chemical composition, clouds, and temperature structure of exoplanet atmospheres. Most exoplanet transmission spectra only span infrared wavelengths (≳1 μ m), which can preclude crucial ...
Charlotte Fairman, Hannah R. Wakeford, Ryan J. MacDonald   +2 more
doaj   +1 more source

Mitigating Worst-case Exozodiacal Dust Structure in High-contrast Images of Earth-like Exoplanets [PDF]

, 2023
Miles Currie, Christopher C. Stark, Jens Kammerer, Roser Juanola-Parramon, Victoria Meadows   +4 more
openalex   +1 more source

From Underground Oceans to Continents: A Glimpse into the Water Inventory on Rocky Planets Using Host Star Abundances

The Astrophysical Journal
The amount of surface water is thought to be critical for a planet’s climate stability and thus habitability. However, the probability that a rocky planet may exhibit surface water at any point in its evolution is dependent on multiple factors, such as ...
Kiersten M. Boley, Wendy R. Panero, Francesca Miozzi, Ashika Capirala, Johanna K. Teske   +4 more
doaj   +1 more source

Effects of Planetary Parameters on Disequilibrium Chemistry in Irradiated Planetary Atmospheres: From Gas Giants to Sub-Neptunes

The Astrophysical Journal
A primary goal of characterizing exoplanet atmospheres is to constrain planetary bulk properties, such as their metallicity, C/O ratio, and intrinsic heat.
Sagnick Mukherjee, Jonathan J. Fortney, Nicholas F. Wogan, David K. Sing, Kazumasa Ohno   +4 more
doaj   +1 more source

Precise Constraints on the Energy Budget of WASP-121 b from Its JWST NIRISS/SOSS Phase Curve

The Astronomical Journal
Ultra-hot Jupiters exhibit day-to-night temperature contrasts upwards of 1000 K due to competing effects of strong winds, short radiative timescales, magnetic drag, and H _2 dissociation/recombination. Spectroscopic phase curves provide critical insights
Jared Splinter, Louis-Philippe Coulombe, Robert C. Frazier, Nicolas B. Cowan, Emily Rauscher, Lisa Dang, Michael Radica, Sean Collins, Stefan Pelletier, Romain Allart, Ryan J. MacDonald, David Lafrenière, Loïc Albert, Björn Benneke, René Doyon, Ray Jayawardhana, Doug Johnstone, Vigneshwaran Krishnamurthy, Caroline Piaulet-Ghorayeb, Lisa Kaltenegger, Michael R. Meyer, Jake Taylor, Jake D. Turner   +22 more
doaj   +1 more source