Results 181 to 190 of about 2,900,879 (209)

Windows into Planetary Science: A Review of Advances in Raman Spectroscopy, Laser-Induced Breakdown Spectroscopy, and Photoluminescence Spectroscopy for Remote Sensing Applications. [PDF]

ACS Appl Opt Mater
Hazra M, Corpino R, Ricci PC.
europepmc   +1 more source

Shock compression of FeOOH and implications for iron-water interactions in super-earth magma oceans. [PDF]

Nat Commun
Zhang Y, Bali K, Dorn C, Ravasio A, Yang H, Pandolfi S, Chen AJ, Wei X, Libon L, Che Q, Zheng D, Boulard E, Benuzzi-Mounaix A, Lee HJ, Galtier E, Czapla NA, Sokaras D, Alonso-Mori R, Gleason AE, Shim SH, Morard G, Mao WL.   +21 more
europepmc   +1 more source

POSEIDON: A Multidimensional Atmospheric Retrieval Code for Exoplanet Spectra [PDF]

Journal of Open Source Software, 2023
Exoplanet atmospheres are a dynamic and fast-changing field at the frontier of modern astronomy. Telescope observations can reveal the chemical composition, temperature, cloud properties, and (potentially) the habitability of these remote worlds ...
Ryan J Macdonald
exaly   +4 more sources

Atmospheric Seasonality as an Exoplanet Biosignature [PDF]

Astrophysical Journal Letters, 2018
Current investigations of exoplanet biosignatures have focused on static evidence of life, such as the presence of biogenic gases like O2 or CH4.
Timothy Lyons, Victoria Meadows, Christopher Reinhard   +2 more
exaly   +2 more sources

The Importance of Optical Wavelength Data on Atmospheric Retrievals of Exoplanet Transmission Spectra [PDF]

Astronomical Journal
Exoplanet transmission spectra provide rich information about the chemical composition, clouds, and temperature structure of exoplanet atmospheres. Most exoplanet transmission spectra only span infrared wavelengths (≳1 μm), which can preclude crucial ...
MacDonald, Ryan J., Fairman, Charlotte, Wakeford, Hannah R.   +2 more
exaly   +4 more sources

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Impact of varying redox states on crystallization and atmospheric composition of rocky exoplanets.

The magma ocean (MO) phase typically describes the early stage of rocky planets, during which the entire planet is molten due to heat generated by accretion processes. In the case of short-period exoplanets inside the runaway greenhouse limit, this phase may last Gyrs, until the inventory of major greenhouse gasses, such as H2O and H2, is exhausted ...
Mariana Sastre, Tim Lichtenberg, Dan Bower, Harrison Nicholls, Inga Kamp   +4 more
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Experimental investigation of the molecular composition of organic hazes in a water-rich exoplanet atmosphere

Transmission spectra have suggested that condensate clouds and/ or photochemical haze are present in the atmospheres of many temperate to warm exoplanets [1]. Aerosols can affect atmospheric composition directly through condensation and heterogeneous reactions, and indirectly by impacting the depth of penetration of photolyzing radiation, as well as ...
Veronique Vuitton, Cedric Wolters, Isabelle Schmitz, Chao He, Francois-Regis Orthous-Daunay, Sarah Moran, Carlos Afonso, Sarah Horst, Nikole Lewis, Julianne Moses   +9 more
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Ion Chemistry and Composition of Planetary Atmospheres: Towards a Characterization of the early Earth and CO2-bearing Exoplanets

  IntroductionThe anoxic Archean atmosphere was likely rich in CH4, but the detailed composition remains difficult to assess from the limited geological records. CH4-driven photochemistry may have produced haze particles, influencing the early Earth's atmospheric energy budget and gas-to-solid conversion[1].
David Dubois, Lauren Scovel, Partha P. Bera, Lora Jovanović, Arnaud Salvador, Thomas Drant, Claire L. Ricketts, Gordon J. Hedley, Farid Salama, Ella Sciamma-O'Brien   +9 more
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Nonthermal Atmospheric Losses for the Exoplanet GJ 3470b

Astronomy Reports, 2023
Valery Shematovich
exaly  

Using High-Resolution Spectroscopy to Study the Composition, Temperature, and Dynamics of Exoplanet Atmospheres

High-resolution spectroscopy, typically operating at resolving powers R greater or equal to 25,000, has matured into one of the primary techniques for characterising the atmospheres of extrasolar planets. The ability of HRS to resolve individual rotational-vibrational lines of molecular bands, combined with the large Doppler shifts experienced by close-
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