![JWST/NIRSpec data for LRL 11001 using the PRISM disperser (bottom, L24) and G235M/G395M (top, this work). Uncertainties of ±1 σ for the latter are plotted as the pink band. The continuum near the 3.4 µm band has S/N∼30.-- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/JWST-detection.png?resize=1200%2C720&ssl=1)
[astro-ph.EP] In recent studies, we have used low-resolution spectroscopy (R~100) with the James Webb Space Telescope (JWST) to uncover low-mass brown dwarfs (2-10 MJup) in the young cluster IC 348 […]
JWST
Posted inBrown Dwarfs
Water Cloud and Chemical Modulations in the Coldest Brown Dwarf
[astro-ph.EP] We present high signal-to-noise, medium resolution (R ~ 1000), time-series JWST/NIRSpec spectra of WISE 0855 (265K), the coldest known brown dwarf.
![JWST MIRI images of the HD 101452 system before and after PSF subtraction. The top row shows 100×100 pixel cutouts of the MIRI images centered on HD 101452 prior to PSF subtraction. The bottom row shows the corresponding PSF-subtracted images. All panels use a common surface brightness scale (-5 to 50 MJy/sr). The companion is detected in all filters at a consistent location with a measured separation of r = 1.276±0.004′′ and position angle θ = 84.3±0.2 ◦ East of North at the time of observation. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/A-Binary-Flux.png?resize=1200%2C719&ssl=1)
Posted inExoplanets, -moons, -comets
A Binary Flux Calibrator Reveals the Scientific Potential of Short-integration JWST MIRI Imaging to Directly Detect sub-Jupiter Exoplanets
[astro-ph.EP] We report the direct imaging detection of a stellar companion to HD 101452 (HIP 56925; Gaia DR3 5384905720847544192), an A star historically used as an infrared flux calibrator.
![Radial gas temperature maps for planets within the in-house 3D GCM framework. The panels illustrate equatorial slice plots of (Tgas, pgas) across three global temperature regimes: 800 K (left), 1600 K (center), and 2400 K (right). Host star types vary by row, descending from A-type to G-type and M-type stars [1] -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Faithful.png?resize=1200%2C717&ssl=1)
Posted inExoplanets, -moons, -comets
Faithful Neural Embeddings For 3D Exoplanet Climate Modeling
[astro-ph.EP] With the rapid advancement of telescopes like JWST and Ariel, there is an urgent need for efficient 3D climate models to interpret observations of exoplanet atmospheres.
![Ratio maps involving the PAH7.7 feature and the F1500W synthetic photometry applied to the MRS cubes for ASPECS galaxies. The first row of panels shows the maps of the total PAH7.7 feature to the synthetic F1500W photometry. Ratios above 1 are possible because the wings of the PAH feature extend well beyond the filter (see text for details and Donnan et al. 2026b). The second row of panels is the fraction of PAH7.7 feature within the F1500W filter to the synthetic F1500W photometry. The third row of panels is the same as the second but for the fraction of continuum emission within the F1500W to the synthetic F1500W photometry -- [astro-ph.GA]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/PAHSPECS.png?resize=1200%2C718&ssl=1)
Posted inAstrochemistry
PAHSPECS: JWST/MIRI Spectroscopy Of PAHs at Cosmic Noon
[astro-ph.GA] The physical conditions of the interstellar medium (ISM) are thought to differ greatly at high redshifts compared to local galaxies. Polycyclic aromatic hydrocarbons (PAHs) are key ISM constituents, mediating […]
Posted inUncategorized
NASA Selects PRIMA (PRobe far-Infrared Mission for Astrophysics) Far-Infrared Telescope as First in New Mission Class
[NASA] By studying radiant energy that only emerges in the far-infrared, PRIMA will address a wide range of questions about the universe.
![Wavelength distributions of candidate spectral lines retained at each step of the line-selection procedure. The histograms show the initial linelist (light), lines retained after automated vetting (intermediate), and the final manually vetted sample (dark). The shaded background regions indicate approximate wavelength ranges for the Y, J, H, and K-bands.-- [astro-ph.SR]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Elemental.png?resize=1200%2C716&ssl=1)
Posted inStellar Cartography
Elemental Abundances of Cool Stars: A Spectroscopic Framework Applied to Five Planet-Host Stars
[astro-ph.SR] Stellar elemental abundances provide important constraints on the chemical environments from which planets form. M and late-K dwarfs are prime targets for the characterization of small exoplanets, yet their […]
Posted inAstrochemistry
JWST Reveals Refractory-Rich Water Ice in Interstellar Comet 3I/ATLAS: Evidence for a Continuum of Grain Properties across Protoplanetary Disks
[astro-ph.EP] We present JWST/NIRSpec PRISM observations of the interstellar comet 3I/ATLAS obtained on 2025 August 6 (Epoch 1), 2025 December 22 (Epoch 2), and 2026 April 1 (Epoch 3), spanning […]
Posted inExoplanets, -moons, -comets
Graph Neural Networks For Exoplanet Atmospheres
[astro-ph.IM] Calculating disequilibrium chemistry in exoplanet atmospheres remains a significant computational bottleneck in atmospheric retrievals. The increasing observational precision from facilities such as JWST and the Ariel mission requires including […]
Posted inAstronomy & Telescopes
Webb Reveals A Stunning Panorama Of Star Formation
[ESA] This starry view of the nearby star-forming region IC 348 is one of the largest images from the NASA/ESA/CSA James Webb Space Telescope released to the public so far.