Results 111 to 120 of about 468,207 (173)
Exoplanet atmospheres: a brand-new and rapidly expanding research field [PDF]
arXiv, 2010 The field of exoplanets is quickly expanding from just the detection of new planets and the measurement of their most basic parameters, such as mass, radius and orbital configuration, to the first measurements of their atmospheric characteristics, such as temperature, chemical composition, albedo, dynamics and structure.
arxiv
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
Exoplanet Atmospheres at High Spectral Resolution [PDF]
arXiv, 2018 The spectrum of an exoplanet reveals the physical, chemical, and biological processes that have shaped its history and govern its future. However, observations of exoplanet spectra are complicated by the overwhelming glare of their host stars.
arxiv
Monthly Notices of the Royal Astronomical SocietyABSTRACT High-contrast eclipsing binaries with low mass M-dwarf secondaries are precise benchmark stars to build empirical mass–radius relationships for fully convective low-mass ($\rm M_{\star } \lt 0.35\, M_{\odot }$) dwarf stars. The contributed light of the M-dwarf in such binaries is usually much less than one per cent at optical ...
D Sebastian +8 more
openaire +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
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
Atmospheric Circulation of Exoplanets [PDF]
arXiv, 2009 We survey the basic principles of atmospheric dynamics relevant to explaining existing and future observations of exoplanets, both gas giant and terrestrial. Given the paucity of data on exoplanet atmospheres, our approach is to emphasize fundamental principles and insights gained from Solar-System studies that are likely to be generalizable to ...
arxiv
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
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
HD 206893 B at High Spectral Resolution with the Keck Planet Imager and Characterizer
The Astronomical JournalWe present an atmospheric characterization and orbital analysis of HD 206893 B, an exceptionally red, L/T-transition substellar companion in a multiplanetary system, via Keck Planet Imager and Characterizer (KPIC) high-resolution ( R ∼ 35,000) K- band ...
Ben Sappey +40 more
doaj +1 more source