WASP-69 b Archives - Astrobiology

Transmission spectra of all cloud models for WASP-107b compared with the JWST NIRCam observations (black points). Dotted lines show small-particle models dominated by Rayleigh scattering (0.1 µm Na2S, KCl, MgSiO3); dashed lines are over-clouded models with suppressed molecular features (1 µm Na2S and MgSiO3); dot-dashed lines are under-clouded models with large features (10 µm Na2S; 5, 10 µm KCl; 10 µm MgSiO3). Solid lines indicate the three best-fit models: 5 µm Na2S (blue), 1 µm KCl (green), and 5 µm MgSiO3 (red). -- astro-ph.EP

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

The Tale Of The 3 Planets: 3D Cloud Feedback Enhances The Spectral Diversity Of Warm Jupiters

by Keith CowingApril 30, 2026April 30, 2026

JWST has shown a large diversity in warm Jupiter spectra, despite only small variations in the planetary parameters. However, the main driver of this diversity remains unclear. We aim to […]

Model spectra (top) and Kp-voffset maps for the combination of all nights (bottom) of H2O, H2S, and CH4 for KELT-11 b. The grey shaded areas show the wavelength regions of the spectral orders used for the analysis. The dotted lines indicate the expected location of the planetary signal. -- astro-ph.EP

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

Upper Limits On Atmospheric Abundances Of KELT-11b And WASP-69b From A Retrieval Approach

by Keith CowingNovember 11, 2025November 11, 2025

WASP-69b and KELT-11b are two low-density hot Jupiters, which are expected to show strong atmospheric features in their transmission spectra.

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

A Next-Generation Exoplanet Atmospheric Retrieval Framework NEXOTRANS for Emission Spectroscopy: New Constraints and Atmospheric Characterization of WASP-69b Using JWST NIRCam and MIRI Observations

by Keith CowingNovember 5, 2025November 5, 2025

Thermal emission spectra provide key insights into the atmospheric composition and especially the temperature structure of an exoplanet.

Concentrations of key species for the terminator region of WASP-69b, for a model with lower boundary 100 bars vs lower boundary 1000 bars. -- astro-ph.EP

Astrogeology, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Brown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Status Report

Kinetic And Photochemical Disequilibrium In The Potentially Carbon-rich Atmosphere Of The Warm-Jupiter WASP-69b

by Keith CowingJanuary 17, 2025January 17, 2025

High-resolution transmission spectroscopy of the warm gas-giant WASP-69b has revealed the presence of H2O, CO, CH4, NH3, and C2H2 in its atmosphere.

Stellar surface intensity map at 1083.31nm computed with PYSME in the case of HAT-P-11 b. The intensity map is relative to the integrated intensity over the stellar map at 1083.31nm. The grid contains 101x101 cells, and the planet’s trajectory is shown with a red solid line with black dots indicating the planet’s center at each observed phase. The planet solid disk is shown at a given phase, with the underlying stellar cells being excluded from the master spectrum computation. -- astro-ph.EP

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

Probing Atmospheric Escape Through Metastable He I Triplet Lines In 15 Exoplanets Observed With SPIRou

by Keith CowingJune 14, 2024June 14, 2024

For several years, the metastable helium triplet line has been successfully used as a tracer to probe atmospheric escape in transiting exoplanets. This absorption in the near-infrared (1083.3 nm) can […]

The combined STIS G430L and G750L spectrum of WASP-39 b (top left), WASP-121 b (top right), WASP-69 b (bottom left), and WASP-17 b (bottom right). Each color (common between planets) corresponds to a different systematics detrending technique, either using linear or GP methods and either between 1-10 PCs or the 10 initial input vectors. -- astro-ph.EP

Astronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report, Stellar Cartography

HST SHEL: Enabling Comparative Exoplanetology with HST/STIS

by Keith CowingJune 3, 2024

The Hubble Space Telescope (HST) has been our most prolific tool to study exoplanet atmospheres. As the age of JWST begins, there is a wealth of HST archival data that […]

The main plot shows the estimated WASP-69 spectrum (black line), which was established from Swift observations and scaling HD 85512’s spectrum (grey line) to solar X-ray/UV flux ratios. Each bandpass-of-interest is shown with background shading. The inset shows the TIMED/SEE data from Solar Cycle 24 from the Fx and Feuv,2 bands along with the best-fit power-law. -- astro-ph.EP

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

Exoplanet Aeronomy: A Case Study of WASP-69b’s Variable Thermosphere

by Keith CowingMay 30, 2024May 30, 2024

Aeronomy, the study of Earth’s upper atmosphere and its interaction with the local space environment, has long traced changes in the thermospheres of Earth and other solar system planets to […]