WASP-107 b Archives

Mg/Si ratios of JWST-observed hot Jupiter host stars versus separation (semi-major axis).

Astrogeology, Astronomy & Telescopes, Atmospheres, Climate, Weather, Brown Dwarfs, Imaging & Spectroscopy, Status Report

Bridging the Gap: Using Brown Dwarfs to Examine Silicate Clouds in Giant Exoplanet Atmospheres

by Keith CowingMarch 17, 2026March 17, 2026

We present results from examining the silicate cloud modeling of four JWST-observed hot Jupiters in the context of brown dwarf theory to further explore signatures of formation in present-day atmospheres.

JWST observations of WASP-107 b (colored vertical bars) along with the best fit model (black line; Kzz = 109 cm2 s −1 ), resulting in a χ˜ 2 red = 3.4. The NIRISS observations are shifted vertically by 130 ppm to match the NIRCam data at the wavelengths where they overlap. The runs with higher and lower Kzz are shown with blue and brown lines, respectively, to illustrate the spectroscopic effects of varying the turbulent diffusivity. The simulated spectrum of a cloudless atmosphere is plotted in gray -- astro-ph.EP

Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

A Cloudy Fit To The Atmosphere of WASP-107 b

by Keith CowingMarch 13, 2026March 13, 2026

Context. WASP-107 b has been observed comprehensively by JWST in the near- and mid-IR bands, making it an ideal planet to probe the composition and internal dynamics. Recent analysis reveals […]

A wavelength fragment of the simulated seven-transit observations of WASP-107 b with VLT/CRIRES+. The wavelength range (horizontal axis, nm) corresponds to the part of spectral order 24 (second order from the bottom) that falls on the middle detector, and the vertical axis is the time dimension starting with exposure 0 of the first observation at the bottom. Horizontal bands correspond to individual transits with 50-64 spectra per transit, with the influence of airmass and variable slit losses affecting the flux level between adjacent exposures. One can clearly distinguish telluric (constant in wavelength) and stellar (shifting with barycentric velocity) lines and notice the variation of telluric absorption strength between transits. -- astro-ph.EP

Astronomy & Telescopes, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Press Release

TSD: An Inverse Problem Approach For Recovering The Exoplanetary Atmosphere Transmission Spectrum From High-resolution Spectroscopy

by Keith CowingSeptember 22, 2025September 22, 2025

Our ability to observe, detect, and characterize exoplanetary atmospheres has grown by leaps and bounds over the last 20 years, aided largely by developments in astronomical instrumentation; improvements in data […]

The sweep of Twinkle’s FOR and location of currently known exoplanets (red) and TESS objects of interest (blue). -- astro-ph.IM

Astronomy & Telescopes, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Missions & Hardware, Press Release

Atmospheric Characterisation With The Twinkle Space Telescope Following Advances From JWST Observations

by Keith CowingAugust 15, 2025August 15, 2025

The Twinkle Space Telescope is a satellite designed for spectroscopic observations of a wide range of extrasolar and solar system objects.

Spatial distributions of MnS (left) and Na2S (right) clouds as a function of longitude, averaged over all latitudes, and pressure in our cloudy SPARC/MITgcm model. The color mapping represents the mass mixing ratio of the cloud particle, with the same scaling in each panel. -- astro-ph.EP

Astrogeology, Astronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

A Panchromatic Characterization Of The Evening And Morning Atmosphere Of WASP-107 b

by Keith CowingJuly 28, 2025July 28, 2025

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 […]

Retrievals of Cassini/VIMS occultation of Titan. Top left: observations and best-fit TauREx retrievals. Bottom left: breakdown of the extinction contributions in the tholin + CH4(l)(HITRAN) case. Right: Atmospheric properties inferred for the tholin + CH4(l) (HITRAN) case. The source for the opacity data (i.e, HITRAN or ExoMol) is important and can slightly change the best-fit spectrum and retrieval interpretation. Overall, the Cassini data is dominated by molecular absorption from CH4, CO, C2H6, C3H8 and extinction by hydrocarbon aerosols (tholins + CHCH4(l). The shape of the 3.4 µm absorption feature is likely best explained by the contribution of multiple species including some contribution from tholins. Overall, retrieval interpretations of Titan’s atmosphere are compatible with stratospheric inferences from previous works (see Figure B1). -- astro-ph.EP

Astronomy & Telescopes, Atmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report, Titan

Cloud and Haze Parameterization in Atmospheric Retrievals: Insights from Titan’s Cassini Data and JWST Observations of Hot Jupiters

by Keith CowingMay 27, 2025May 27, 2025

Context: Before JWST, telescope observations were not sensitive enough to constrain the nature of clouds in exo-atmospheres. Recent observations, however, have inferred cloud signatures as well as haze-enhanced scattering slopes […]

A5 Apparent chromatic offsets in WASP-107b’s time of conjunction with wavelength due to limb asymmetry. Shown are the best-fit times of conjunction as a function of wavelength when fitting our JWST/NIRCam F322W2 data by itself. We fit the data using a uniformlimb transit model, described in Section 3.4.2, fitting only for tc, the planet-star radius ratio, and a linear flux vs. time ramp model. The black points are the result from fitting each of our thirty spectroscopic light curves. The purple line is the result from fitting the broadband light curve, with the shaded region representing the 1-σ uncertainty. We show the difference between these results and the joint-fit time of conjunction derived by fitting other multi-wavelength data sets simultaneously, whose uncertainty is shown as the green shaded region. The observed difference is due to the significant evening-morning limb asymmetry on WASP-107b at these wavelengths. -- astro-ph.EP

Astronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

Evidence for Morning-to-Evening Limb Asymmetry on the Cool Low-Density Exoplanet WASP-107b

by Keith CowingJune 22, 2024June 22, 2024

Transmission spectroscopy has enabled unprecedented insights into the makeup of exoplanet atmospheres. A transmission spectrum combines contributions from a planet’s morning and evening limbs, but these limbs may have different […]

An artist’s concept of WASP-107 b shows turbulent atmospheric mixing within the planet’s gas envelope. CREDIT Roberto Molar Candanosa/Johns Hopkins University

Astrochemistry, Astronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Press Release

Webb Telescope Offers The First Glimpse Of An Exoplanet’s Interior

by Keith CowingMay 20, 2024May 20, 2024

A surprisingly low amount of methane and a super-sized core hide within the cotton candy–like planet WASP-107 b.

Astrochemistry, Astronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Press Release

Webb Studies Inflated Exoplanet WASP-107 b

by Keith CowingMay 20, 2024May 20, 2024

Why is the warm gas-giant exoplanet WASP-107 b so puffy? Two independent teams of researchers have an answer.

WASP-107 b

Bridging the Gap: Using Brown Dwarfs to Examine Silicate Clouds in Giant Exoplanet Atmospheres

A Cloudy Fit To The Atmosphere of WASP-107 b

TSD: An Inverse Problem Approach For Recovering The Exoplanetary Atmosphere Transmission Spectrum From High-resolution Spectroscopy

Atmospheric Characterisation With The Twinkle Space Telescope Following Advances From JWST Observations

A Panchromatic Characterization Of The Evening And Morning Atmosphere Of WASP-107 b

Evidence for Morning-to-Evening Limb Asymmetry on the Cool Low-Density Exoplanet WASP-107b

Webb Telescope Offers The First Glimpse Of An Exoplanet’s Interior

Webb Studies Inflated Exoplanet WASP-107 b

Underwater Oxygen Loss Threatens Earth’s Stability, Researchers Warn

Fire And Ice: Were Yellowstone’s Past Volcanic Eruptions And Glaciations Related?

Substrate-Agnostic 3x: Biosignatures, Technosignatures, Ecologies

Planet-moon Ejections In Close Stellar Encounters

First Study Hints Solar Storms May Alter The Weather During Martian Dust Storms