Results 71 to 80 of about 59,298 (206)

The Response of Planetary Atmospheres to the Impact of Icy Comets. II. Exo-Earth Analogs

The Astrophysical Journal
The orbital regime of a terrestrial planet plays a significant role in shaping its atmospheric dynamics, climate, and hence potential habitability. The orbit is also likely to play a role in shaping the response of a planetary atmosphere to the influx of
F. Sainsbury-Martinez, C. Walsh
doaj   +1 more source

Multiepoch Detections of the Extended Atmosphere and Transmission Spectra of KELT-9b with a 1.5 m Telescope

The Astronomical Journal, 2023
Irradiated Jovian atmospheres are complex and dynamic and can undergo temporal variations due to the close proximity of their parent stars. Of the Jovian planets that have been cataloged to date, KELT-9b is the hottest gas giant known, with an ...
Nataliea Lowson, George Zhou, Duncan J. Wright, Chelsea X. Huang, João M. Mendonça, Samuel H. C. Cabot, Christa Pudmenzky, Robert A. Wittenmyer, David W. Latham, Allyson Bieryla, Gilbert A. Esquerdo, Perry Berlind, Michael L. Calkins   +12 more
doaj   +1 more source

Hydrogen sulfide and metal-enriched atmosphere for a Jupiter-mass exoplanet. [PDF]

Nature
As the closest transiting hot Jupiter to Earth, HD 189733b has been the benchmark planet for atmospheric characterization 1,2,3. It has also been the anchor point for much of our theoretical understanding of exoplanet atmospheres from composition 4 ...
Guangwei Fu, L. Welbanks, D. Deming, J. Inglis, Michael Zhang, J. Lothringer, Jegug Ih, J. Moses, E. Schlawin, H. Knutson, Gregory W. Henry, Thomas P. Greene, David K. Sing, A. Savel, E. Kempton, D. Louie, M. Line, M. Nixon   +17 more
semanticscholar   +1 more source

A Panchromatic Characterization of the Evening and Morning Atmosphere of WASP-107 b: Composition and Cloud Variations, and Insight into the Effect of Stellar Contamination

The Astronomical Journal
Limb-resolved transmission spectroscopy has the potential to transform our understanding of exoplanetary atmospheres. By separately measuring the transmission spectra of the evening and morning limbs, these atmospheric regions can be individually ...
Matthew M. Murphy, Thomas G. Beatty, Everett Schlawin, Taylor J. Bell, Michael Radica, Thomas D. Kennedy, Nishil Mehta, Luis Welbanks, Michael R. Line, Vivien Parmentier, Thomas P. Greene, Sagnick Mukherjee, Jonathan J. Fortney, Kazumasa Ohno, Lindsey Wiser, Kenneth Arnold, Emily Rauscher, Isaac R. Edelman, Marcia J. Rieke   +18 more
doaj   +1 more source

Deuterium Escape on Photoevaporating Sub-Neptunes

The Astrophysical Journal Letters, 2023
We investigate the evolution of the deuterium-to-hydrogen (D/H) mass ratio driven by EUV photoevaporation of hydrogen-rich atmospheres of close-in sub-Neptunes around solar-type stars.
Pin-Gao Gu, Howard Chen
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

The Runaway Greenhouse Effect on Hycean Worlds

The Astrophysical Journal, 2023
Hycean worlds are a proposed subset of sub-Neptune exoplanets with substantial water inventories, liquid surface oceans, and extended hydrogen-dominated atmospheres favorable for habitability.
Hamish Innes, Shang-Min Tsai, Raymond T. Pierrehumbert   +2 more
doaj   +1 more source

Refraction in exoplanet atmospheres: Photometric signatures, implications for transmission spectroscopy, and search in Kepler data

, 2017
Refraction deflects photons that pass through atmospheres, which affects transit light curves. Refraction thus provides an avenue to probe physical properties of exoplanet atmospheres and to constrain the presence of clouds and hazes.
B.-O. Demory, Benneke, Berta-Thompson, Bétrémieux, Bétrémieux, Bétrémieux, Bétrémieux, Bétrémieux, Charbonneau, Claret, D. Alp, Dalba, Demory, Demory, Fressin, García Muñoz, Gillon, Hippke, Hubbard, Huber, Hui, Jenkins, Kaltenegger, Kipping, Koch, Luger, Mandel, Misra, Misra, Robitaille, Seager, Seiff, Sheets, Sidis, Smith, Stumpe, Sudarsky, Weiss, Witteborn   +38 more
core   +1 more source

Fleeting but Not Forgotten: The Imprint of Escaping Hydrogen Atmospheres on Super-Earth Interiors

The Astrophysical Journal
Small, close-in exoplanets are divided into two subpopulations: super-Earths and sub-Neptunes. Most super-Earths are thought to have lost their primordially accreted hydrogen-dominated atmospheres via thermally driven winds.
James G. Rogers, Hilke E. Schlichting, Edward D. Young   +2 more
doaj   +1 more source

Supplementary data from Atmospheric composition of exoplanets based on the thermal escape of gases and implications for habitability

, 2020
The detection of habitable exoplanets is an exciting scientific and technical challenge. Owing to the current and most likely long-lasting impossibility of performing in situ exploration of exoplanets, their study and hypotheses regarding their capability to host life will be based on the restricted low-resolution spatial and spectral information of ...
Konatham, Samuel, Martin-Torres, Javier, Maria-Paz Zorzano   +2 more
openaire   +1 more source