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The JWST provides exoplanet transit observations with unprecedented spectral coverage, enabling detailed atmospheric characterisation. However, systematics introduced during data reduction can lead to small but significant uncertainties…

Earth and Planetary Astrophysics · Physics 2026-03-25 J. Roy-Perez , S. Pérez-Hoyos , N. Barrado-Izagirre , H. Chen-Chen

Aerosols are capable of having a huge influence on reflected, emitted and transmitted planetary spectra. The Near InfraRed Spectrograph (NIRSpec) using the PRISM mode on board of the James Webb Space Telescope (JWST) is providing valuable…

Earth and Planetary Astrophysics · Physics 2025-02-19 J. Roy-Perez , S. Pérez-Hoyos , N. Barrado-Izagirre , H. Chen-Chen

Since the launch of JWST, observations of exoplanetary atmospheres have seen a revolution in data quality. Given that atmospheric parameter inferences depend heavily on the underlying data, a re-evaluation of current methodologies is…

Earth and Planetary Astrophysics · Physics 2026-05-08 Simon Schleich , Sudeshna Boro Saikia , Quentin Changeat , Manuel Güdel , Aiko Voigt , Ingo Waldmann

We have entered the era of the James Webb Space Telescope (JWST). We use the first JWST transmission spectrum of the hot Saturn-mass exoplanet, WASP-39 b, obtained with the NIRSpec instrument in the 3-5 $\mu$m range to investigate (a) what…

Earth and Planetary Astrophysics · Physics 2023-02-08 Savvas Constantinou , Nikku Madhusudhan , Siddharth Gandhi

This paper aims at providing a comprehensive framework to generate an astrophysical scene and to simulate realistic hyperspectral and multispectral data acquired by two JWST instruments, namely NIRCam Imager and NIRSpec IFU. We want to show…

Instrumentation and Methods for Astrophysics · Physics 2020-06-24 Claire Guilloteau , Thomas Oberlin , Olivier Berné , Nicolas Dobigeon

In the era of the James Webb Space Telescope (JWST), the dramatic improvement in the spectra of exoplanetary atmospheres demands a corresponding leap forward in our ability to analyze them: atmospheric retrievals need to be performed on…

Earth and Planetary Astrophysics · Physics 2025-05-06 Anna Lueber , Konstantin Karchev , Chloe Fisher , Matthias Heim , Roberto Trotta , Kevin Heng

With a scheduled launch in October 2018, the James Webb Space Telescope (JWST) is expected to revolutionise the field of atmospheric characterization of exoplanets. The broad wavelength coverage and high sensitivity of its instruments will…

Earth and Planetary Astrophysics · Physics 2016-12-21 M. Rocchetto , I. P. Waldmann , O. Venot , P. -O. Lagage , G. Tinetti

The James Webb Space Telescope (JWST) is ushering in a new era in remote sensing of exoplanetary atmospheres. Atmospheric retrievals of exoplanets can be highly sensitive to high-precision JWST data. It is, therefore, imperative to…

Earth and Planetary Astrophysics · Physics 2023-07-12 Måns Holmberg , Nikku Madhusudhan

The James Webb Space Telescope (JWST) is predicted to make great advances in the field of exoplanet atmospheres. Its 25 m2 mirror means that it can reach unprecedented levels of precision in observations of transit spectra, and can thus…

Earth and Planetary Astrophysics · Physics 2015-02-10 Joanna K. Barstow , Suzanne Aigrain , Patrick G. J. Irwin , Sarah Kendrew , Leigh N. Fletcher

The Hubble Space Telescope has been a pioneering instrument for studying the atmospheres of exoplanets, specifically its WFC3 and STIS instruments. With the launch of JWST, we are able to observe larger spectral ranges at higher precision.…

Observing exoplanets through transmission spectroscopy supplies detailed information on their atmospheric composition, physics, and chemistry. Prior to JWST, these observations were limited to a narrow wavelength range across the…

The James Webb Space Telescope (JWST) is expected to revolutionize our understanding of Jovian worlds over the coming decade. However, as we push towards characterizing cooler, smaller, "terrestrial-like" planets, dedicated next-generation…

Earth and Planetary Astrophysics · Physics 2020-03-04 Luke Tremblay , Michael R Line , Kevin B Stevenson , Tiffany Kataria , Robert T Zellem , Jonathan J Fortney , Caroline V Morley

As the James Webb Space Telescope (JWST) came online last summer, we entered a new era of astronomy. This new era is supported by data products of unprecedented information content that require novel reduction and analysis techniques.…

Earth and Planetary Astrophysics · Physics 2023-06-28 Prajwal Niraula , Julien de Wit , Iouli E. Gordon , Robert J. Hargreaves , Clara Sousa-Silva

The high angular resolution technique of non-redundant masking (NRM) or aperture masking interferometry (AMI) has yielded images of faint protoplanetary companions of nearby stars from the ground. AMI on James Webb Space Telescope (JWST)'s…

Instrumentation and Methods for Astrophysics · Physics 2015-06-23 Alexandra Z. Greenbaum , Laurent Pueyo , Anand Sivaramakrishnan , Sylvestre Lacour

The James Webb Space Telescope (JWST) will enable the detection of optical emission lines in galaxies spanning a broad range of luminosities out to redshifts z>10. Measurements of key galaxy properties, such as star formation rate and…

We present an atmospheric retrieval analysis of the Y0 brown dwarf WISE J035934.06$-$540154.6 using the low-resolution 0.96--12 $\mu$m JWST spectrum presented in \citet{Beiler_2023}. We obtain volume number mixing ratios of the major…

The Near Infrared Imager and Slitless Spectrograph (NIRISS) on the James Webb Space Telescope (JWST) is a versatile instrument for collecting imaging and wide-field slitless spectroscopy (WFSS) data for surveys of galaxy clusters,…

Instrumentation and Methods for Astrophysics · Physics 2024-10-02 Raphael E. Hviding , Ivelina G. Momcheva , Leonardo Clarke

Using forward models for representative exoplanet atmospheres and a radiometric instrument model, we have generated synthetic observational data to explore how well the major C- and O-bearing chemical species (CO, CO2, CH4, and H2O),…

High-contrast, medium-resolution spectroscopy with JWST can resolve molecular and isotopic features in cool substellar atmospheres, but for close-in companions the extracted spectra can be biased by wavelength-dependent residual stellar…

Earth and Planetary Astrophysics · Physics 2026-05-05 Darío González Picos , Tessa van der Post , Sam de Regt , Jean-Baptiste Ruffio , Natalie Grasser , Ignas Snellen

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. Accurate analysis of these datasets…

Earth and Planetary Astrophysics · Physics 2025-06-16 Tonmoy Deka , Tasneem Basra Khan , Swastik Dewan , Priyankush Ghosh , Debayan Das , Liton Majumdar
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