Results 121 to 130 of about 59,298 (206)

A Next-generation Exoplanet Atmospheric Retrieval Framework for Transmission Spectroscopy (NEXOTRANS): Comparative Characterization for WASP-39 b Using JWST NIRISS, NIRSpec PRISM, and MIRI Observations

The Astrophysical Journal
The advent of JWST has marked a new era in exoplanetary atmospheric studies, offering higher-resolution data and greater precision across a broader spectral range than previous space-based telescopes.
Tonmoy Deka, Tasneem Basra Khan, Swastik Dewan, Priyankush Ghosh, Debayan Das, Liton Majumdar   +5 more
doaj   +1 more source

First Results from WINERED: Detection of Emission Lines from Neutral Iron and a Combined Set of Trace Species on the Dayside of WASP-189 b

The Astronomical Journal
Ground- and space-based observations have revealed that ultrahot Jupiters (UHJs, T _eq  > 2200 K) typically have inverted thermal profiles, while cooler hot Jupiters have noninverted ones.
Lennart van Sluijs, Emily Rauscher, Eliza M.-R. Kempton, Thomas Kennedy, Isaac Malsky, Noriyuki Matsunaga, Michael Meyer, Andrew McWilliam, John D. Monnier, Shogo Otsubo, Yuki Sarugaku, Tomomi Takeuchi   +11 more
doaj   +1 more source

The composition and dynamics of exoplanet atmospheres. [PDF]

The study of exoplanets has rapidly developed in the last twenty years, and the detailed characterization of planetary atmospheres has become a key area of research.\ud \ud For transiting planets around bright stars, atmospheric features can be detected with transmission spectroscopy.
openaire  

Signature of Vertical Mixing in Hydrogen-dominated Exoplanet Atmospheres

The Astrophysical Journal
Vertical mixing is a crucial disequilibrium process in exoplanet atmospheres, significantly impacting chemical abundance and observed spectra. While current state-of-the-art observations have detected its signatures, the effect of vertical mixing on ...
Vikas Soni, Kinsuk Acharyya
doaj   +1 more source

Controls of Atmospheric Methane on Early Earth and Inhabited Earth-like Terrestrial Exoplanets

The Astrophysical Journal
Methane (CH _4 ) is a primarily biogenic greenhouse gas. As such, it represents an essential biosignature to search for life on exoplanets. Atmospheric CH _4 abundance on Earth-like inhabited exoplanets is likely controlled by marine biogenic production ...
Aika Akahori, Yasuto Watanabe, Eiichi Tajika   +2 more
doaj   +1 more source

JWST Thermal Emission of the Terrestrial Exoplanet GJ 1132b

The Astrophysical Journal Letters
We present thermal emission measurements of GJ 1132b spanning 5–12 μ m obtained with the Mid-Infrared Instrument Low-Resolution Spectrometer on the James Webb Space Telescope.
Qiao Xue, Jacob L. Bean, Michael Zhang, Alexandra Mahajan, Jegug Ih, Jason D. Eastman, Jonathan Lunine, Megan Weiner Mansfield, Brandon Park Coy, Eliza M.-R. Kempton, Daniel Koll, Edwin Kite   +11 more
doaj   +1 more source

JWST's eyes on an alien world. [PDF]

Innovation (Camb), 2023
Zhang X.
europepmc   +1 more source

Retrieval of atmospheric structure and composition of exoplanets from transit spectroscopy

, 2016
Recent spectroscopic observations of transiting exoplanets have permitted the derivation of the thermal structure and molecular abundances of H2O, CO, CO2, CH4, metallic oxides and alkali metals in these extreme atmospheres. Here, for the first time, a fully-fledged retrieval algorithm has been applied to exoplanet spectra to determine the thermal ...
openaire   +1 more source

Prospects for detecting signs of life on exoplanets in the JWST era. [PDF]

Proc Natl Acad Sci U S A
Seager S, Welbanks L, Ellerbroek L, Bains W, Petkowski JJ.   +4 more
europepmc   +1 more source

Unraveling the complex inventory of biorelevant organics in the plumes of icy moons. [PDF]

Proc Natl Acad Sci U S A, 2023
Kaiser RI.
europepmc   +1 more source