Results 81 to 90 of about 700,042 (263)

Observations of PAHs in the atmospheres of discs and exoplanets

Monthly Notices of the Royal Astronomical Society, 2022
ABSTRACT Polycyclic aromatic hydrocarbons (PAHs) play a key role in the chemical and hydrodynamical evolution of the atmospheres of exoplanets and planet-forming discs. If they can survive the planet formation process, PAHs are likely to be involved in pre-biotic chemical reactions eventually leading to more complex molecules such as ...
Ercolano, Barbara, Rab, Christian, Molaverdikhani, Karan, Edwards, Billy, Preibisch, Thomas, Testi, Leonardo, Kamp, Inga, Thi, Wing-Fai   +7 more
openaire   +3 more sources

The Air Over There: Exploring Exoplanet Atmospheres [PDF]

Elements, 2021
The atmospheric composition for a rocky exoplanet will depend strongly on the planet’s bulk composition and orbital position. Nontraditional gases may be present in the atmospheres of exceptionally hot planets. Atmospheres of more clement planets will depend on the abundance of volatiles acquired during planet formation and atmospheric removal ...
Vivien Parmentier, Laura Schaefer
openaire   +3 more sources

Characterizing the Atmospheric Dynamics of HD 209458b-like Hot Jupiters Using AI-driven Image Recognition/Categorization

The Astrophysical Journal, 2023
In order to understand the results of recent observations of exoplanets, models have become increasingly complex. Unfortunately, this increases both the computational cost and output size of said models.
F. Sainsbury-Martinez, P. Tremblin, M. Mancip, S. Donfack, E. Honore, M. Bourenane   +5 more
doaj   +1 more source

Spectral Retrieval with JWST Photometric data: a Case Study for HIP 65426 b

The Astronomical Journal, 2023
Half of the JWST high-contrast imaging objects will only have photometric data as of Cycle 2. However, to better understand their atmospheric chemistry that informs formation origin, spectroscopic data are preferred.
Ji Wang
doaj   +1 more source

Clouds and Hazes in Exoplanet Atmospheres [PDF]

, 2013
book chapter to appear in "Comparative Climatology of Terrestrial Planets" (S. Mackwell, M. Bullock, J. Harder, eds.; University of Arizona Press, 2013)
Jeffrey N. Cuzzi, Andrew S. Ackerman, Mark S. Marley, Daniel Kitzmann   +3 more
openaire   +4 more sources

Laboratory spectra of hot molecules: data needs for hot super-Earth exoplanets [PDF]

, 2017
The majority of stars are now thought to support exoplanets. Many of those exoplanets discovered thus far are categorized as rocky objects with an atmosphere. Most of these objects are however hot due to their short orbital period.
Tennyson, Jonathan, Yurchenko, Sergei N.
core   +2 more sources

Outstanding Challenges of Exoplanet Atmospheric Retrievals [PDF]

Space Science Reviews, 2020
Spectral retrieval has long been a powerful tool for interpreting planetary remote sensing observations. Flexible, parameterised, agnostic models are coupled with inversion algorithms in order to infer atmospheric properties directly from observations, with minimal reliance on physical assumptions. This approach, originally developed for application to
Kevin Heng, Joanna K. Barstow, Joanna K. Barstow   +2 more
openaire   +5 more sources

Atmospheric Circulation of Terrestrial Exoplanets [PDF]

, 2013
The investigation of planets around other stars began with the study of gas giants, but is now extending to the discovery and characterization of super-Earths and terrestrial planets. Motivated by this observational tide, we survey the basic dynamical principles governing the atmospheric circulation of terrestrial exoplanets, and discuss the ...
Showman, Adam P., Wordsworth, Robin, Merlis, Timothy M., Kaspi, Yohai   +3 more
openaire   +4 more sources

Exoplanet phase curves: observations and theory

, 2018
Phase curves are the best technique to probe the three dimensional structure of exoplanets' atmospheres. In this chapter we first review current exoplanets phase curve observations and the particular challenges they face.
A Shporer, A Shporer, Adam P. Showman, AP Showman, AP Showman, AP Showman, BO Demory, BO Demory, C Visscher, Curtis S. Cooper, D Perez-Becker, D Piskorz, D. J. Armstrong, DDB Koll, F Selsis, HA Knutson, HA Knutson, Heather A. Knutson, I Hubeny, Ian Wong, Ian Wong, IJM Crossfield, IJM Crossfield, IJM Crossfield, J Harrington, J Langton, J Leconte, J Leconte, J Wit de, J Yang, J. C. Schwartz, JC Schwartz, JE Krick, JJ Fortney, K Batygin, K Haynes, K Heng, K Heng, KB Stevenson, KB Stevenson, KB Stevenson, KB Stevenson, Kevin B. Stevenson, L Kreidberg, Lisa J. Esteves, M Agúndez, M Oreshenko, MR Line, MW Webber, N Iro, NB Cowan, NB Cowan, NB Cowan, Nicolas B. Cowan, NK Lewis, NK Lewis, P Hut, PFL Maxted, R Hu, R Perna, R Perna, Robert T. Zellem, RT Pierrehumbert, S Fromang, S Millholland, SM Tsai, SR Kane, T Guillot, T Kataria, T Kataria, TD Komacek, Thaddeus D. Komacek, TM Evans, TM Rogers, TM Rogers, UA Dyudina, V Parmentier, Vivien Parmentier, Vivien Parmentier, Vivien Parmentier, X Zhang, YK Feng   +81 more
core   +1 more source

Hα Absorption in Transiting Exoplanet Atmospheres [PDF]

Proceedings of the International Astronomical Union, 2013
AbstractRecent observations by Jensen et al. of Hα absorption by the upper atmosphere of HD189733b have motivated the need for a theoretical understanding of the distribution of n=2 hydrogen within hot Jupiter atmospheres. With this in mind, we model the n=2 state of atomic hydrogen in a hydrostatic atmosphere in thermal and photoionization equilibrium.
Phil Arras, Zhi-Yun Li, Duncan Christie
openaire   +5 more sources