Results 61 to 70 of about 1,099 (180)

Sulfur Dioxide and Other Molecular Species in the Atmosphere of the Sub-Neptune GJ 3470 b

open access: yesThe Astrophysical Journal Letters
We report observations of the atmospheric transmission spectrum of the sub-Neptune exoplanet GJ 3470 b taken using the Near-Infrared Camera on JWST.
Thomas G. Beatty   +15 more
doaj   +1 more source

Signs of Similar Stellar Obliquity Distributions for Hot and Warm Jupiters Orbiting Cool Stars

open access: yesThe Astronomical Journal
Transiting giant planets provide a natural opportunity to examine stellar obliquities, which offer clues about the origin and dynamical histories of close-in planets.
Marvin Morgan   +5 more
doaj   +1 more source

Formation and evolution of exoplanets in different environments

open access: yes, 2017
Invited Review. To appear in Astronomical Society of the Pacific (ASP) Conference Series "Non-Stable Universe: Energetic Resources, Activity Phenomena and Evolutionary Processes" dedicated to the 70th anniversary of Byurakan Astrophysical ...
openaire   +2 more sources

A Tale of Dynamical Instabilities and Giant Impacts in the Exoplanet Radius Valley

open access: yesThe Astrophysical Journal Letters
The size distribution of planets with radii between 1 R _⊕ and 4 R _⊕ peaks near 1.4 R _⊕ and 2.2 R _⊕ , with a dip around 1.8 R _⊕ —the so-called “radius valley.” Recent statistical analyses suggest that planets within this valley (1.5 
Sho Shibata, Andre Izidoro
doaj   +1 more source

Planet formation – implication of statistical properties of exoplanets

open access: yesJournal of Physics: Conference Series, 2010
Models of planetary formation are developed based on the observation of our Solar System, star-forming regions and circumstellar disks and on an the ever increasing number of exoplanetary systems. The solar nebula theory and the planetesimal hypothesis are discussed.
openaire   +1 more source

Cloud formation in exoplanet atmospheres : nucleation of small molecular clusters

open access: yes, 2023
It has been inferred that many exoplanets host clouds in their atmospheres. Understanding the processes through which these clouds form, and being able to model them is essential for our understanding of their climate and to explain our observations.
openaire   +3 more sources

Most Super-Earths Have Less Than 3% Water

open access: yesThe Astrophysical Journal
Super-Earths are highly irradiated, small planets with bulk densities approximately consistent with Earth. We construct combined interior atmosphere models of super-Earths that trace the partitioning of water throughout a planet, including an iron-rich ...
James G. Rogers   +4 more
doaj   +1 more source

Early Accretion of Large Amounts of Solids for Directly Imaged Exoplanets

open access: yesThe Astrophysical Journal
As the number of planetary-mass objects (PMOs; ⪅13 M _Jupiter ) at wider separation (⪆10 au) grows, there is emerging evidence that they form differently from their higher-mass brown dwarf counterparts.
Ji Wang
doaj   +1 more source

Sub-Neptunes Show a Stronger Correlation with Cold Jupiters than Super-Earths Especially in Metal-rich Systems

open access: yesThe Astrophysical Journal Letters
The correlation between the inner small planets and cold giants encodes the formation and evolution of planetary systems. It remains unclear if the correlation differs on the two sides of the radius valley.
Di-Chang Chen   +4 more
doaj   +1 more source

The Polar Orbit of TOI-2374 b, a Planet in the Neptunian Ridge

open access: yesThe Astronomical Journal
The “Neptunian ridge” is a recently identified peak in the frequency of planets with sizes between that of Neptune and Saturn orbiting their host stars with periods between 3 and 6 days.
Samuel W. Yee   +13 more
doaj   +1 more source

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