Results 101 to 110 of about 5,501 (199)
Signature of Vertical Mixing in Hydrogen-dominated Exoplanet Atmospheres
The Astrophysical JournalVertical mixing is a crucial disequilibrium process in exoplanet atmospheres, significantly impacting chemical abundance and observed spectra. While current state-of-the-art observations have detected its signatures, the effect of vertical mixing on ...
Vikas Soni, Kinsuk Acharyya
doaj +1 more source
The composition and dynamics of exoplanet atmospheres. [PDF]
The study of exoplanets has rapidly developed in the last twenty years, and the detailed characterization of planetary atmospheres has become a key area of research.\ud \ud For transiting planets around bright stars, atmospheric features can be detected with transmission spectroscopy.
openaire
The Astrophysical JournalWe present medium-wave (∼0.5–13 μ m) radiative flux distributions and spectra derived from high-resolution atmospheric dynamics simulations of an exoplanet, WASP-121 b. This planet serves to illustrate several important features.
Jagat Kafle +2 more
doaj +1 more source
Coupled Planetary Interior and Tidal Evolution
The Astrophysical JournalWe 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
Radiatively Active Clouds and Magnetic Effects Explored in a Grid of Hot Jupiter GCMs
The Astrophysical JournalCloud formation and magnetic effects are both expected to significantly impact the structures and observable properties of hot Jupiter atmospheres. For some hot Jupiters, thermal ionization and condensation can coexist in a single atmosphere, and both ...
Thomas D. Kennedy +4 more
doaj +1 more source
Formation of Near-surface Atmospheric Inversion and Surface Inversion in Hothouse Climates
The Astrophysical JournalA hothouse climate may develop throughout Earth’s history and its warming future, and on potentially habitable exoplanets near the inner edge of the habitable zone.
Jiachen Liu, Feng Ding, Jun Yang
doaj +1 more source
The Astrophysical JournalHot Jupiters are typically considered to be tidally locked due to their short orbital periods. The extreme irradiation can result in atmospheric species becoming thermally ionized on the dayside, which then interact with the planet’s magnetic field by ...
Hayley Beltz +5 more
doaj +1 more source
A Large and Variable Leading Tail of Helium in a Hot Saturn Undergoing Runaway Inflation
The Astronomical JournalAtmospheric escape shapes the fate of exoplanets, with statistical evidence for transformative mass loss imprinted across the mass–radius–insolation distribution.
Michael Gully-Santiago +16 more
doaj +1 more source
Evaporation of Close-in Sub-Neptunes by Cooling White Dwarfs
The Astrophysical Journal LettersMotivated by the recent surge in interest concerning white dwarf (WD) planets, this work presents the first numerical exploration of WD-driven atmospheric escape, whereby the high-energy radiation from a hot/young WD can trigger the outflow of the ...
Elena Gallo +7 more
doaj +1 more source
Extreme Winds on the Emerging Dayside of an Ultrahot Jupiter
The Astrophysical Journal LettersHigh-resolution spectroscopy provides a unique opportunity to directly probe atmospheric dynamics by resolving Doppler shifts of planetary signals as a function of orbital phase. Using the optical spectrometer the Keck Planet Finder, we carry out a pilot
Yapeng Zhang +19 more
doaj +1 more source