Results 111 to 120 of about 44,780 (221)
Exoplanetary Atmospheres - Chemistry, Formation Conditions, and Habitability [PDF]
, 2016 Characterizing the atmospheres of extrasolar planets is the new frontier in exoplanetary science. The last two decades of exoplanet discoveries have revealed that exoplanets are very common and extremely diverse in their orbital and bulk properties.
arxiv +1 more source
JWST/NIRISS Reveals the Water-rich “Steam World” Atmosphere of GJ 9827 d
The Astrophysical Journal LettersWith sizable volatile envelopes but smaller radii than the solar system ice giants, sub-Neptunes have been revealed as one of the most common types of planet in the galaxy. While the spectroscopic characterization of larger sub-Neptunes (2.5–4 R _⊕ ) has
Caroline Piaulet-Ghorayeb +32 more
doaj +1 more source
Atmospheric Circulation of Exoplanets
, 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 ...
Showman, Adam P. +2 more
openaire +2 more sources
POSEIDON: A Multidimensional Atmospheric Retrieval Code for Exoplanet Spectra [PDF]
Journal of Open Source Software (2023): 8(81), 4873Spectroscopic observations of exoplanet atmospheres can reveal the chemical composition, temperature, cloud properties, and (potentially) the habitability of these distant worlds. The inference of such properties is generally enabled by Bayesian atmospheric retrieval algorithms.
arxiv +1 more source
Solar Wind Power Likely Governs Uranus' Thermosphere Temperature
Geophysical Research Letters, Volume 51, Issue 22, 28 November 2024.Abstract Observations of Uranus in the near‐infrared by ground‐based telescopes from 1992 to 2018 have shown that the planet's upper atmosphere (thermosphere) steadily cooled from ∼700 to ∼450 K. We explain this cooling as due to the concurrent decline in the power of the solar wind incident on Uranus' magnetic field, which has dropped by ∼50% over the
A. Masters +3 more
wiley +1 more source
The Astrophysical JournalCompositional convection is atmospheric mixing driven by density variations caused by compositional gradients. Previous studies have suggested that compositional gradients of atmospheric trace species within planetary atmospheres can impact convection ...
Namrah Habib, Raymond T. Pierrehumbert
doaj +1 more source
Exoplanet Aeronomy: A Case Study of WASP-69 b’s Variable Thermosphere
The Astronomical JournalAeronomy, the study of Earth’s upper atmosphere and its interaction with the local space environment, has long traced changes in the thermospheres of Earth and other solar system planets to solar variability in the X-ray and extreme-ultraviolet ...
W. Garrett Levine +7 more
doaj +1 more source
JWST-TST DREAMS: Nonuniform Dayside Emission for WASP-17b from MIRI/LRS
The Astronomical JournalWe 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 +25 more
doaj +1 more source
Transport of ionizing radiation in terrestrial-like exoplanet atmospheres [PDF]
, 2004 David S. Smith +2 more
openalex +1 more source
A Photochemical Phosphorus-Hydrogen-Oxygen Network for Hydrogen-dominated Exoplanet Atmospheres
The Astrophysical JournalDue to the detection of phosphine (PH _3 ) in the solar system gas giants Jupiter and Saturn, PH _3 has long been suggested to be detectable in exosolar substellar atmospheres too.
Elspeth K. H. Lee +5 more
doaj +1 more source