![The H2 and [Ne II] emission detected towards DoAr 25 on top of the ALMA 240 GHz continuum emission (shown in the background as a reddish-yellow image). The white central circle shows the inner working angle from JWST. In this case, the disk itself is seen in absorption against line emission from the Ophiuchus PDR for H2 S(1)-S(3) (17.03-9.66 µm). -- astro-ph.SR)](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/05/Characterizing-The-Extended.png?resize=1200%2C721&ssl=1)
We present a comprehensive analysis of extended H2 emission from 34 protoplanetary disks observed with the JWST Disk Infrared Spectroscopic Chemistry Survey (JDISCS), supplemented by archival data.
Protoplanetary Disk
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Imaging & Spectroscopy, Interstellar, Status Report
JOYS+ Analyses Of OCN−, N2O, NO, And Complex Cyanides In Ices — Thermal Processing Results In Modest Enhancement Of OCN− Ice
Nitrogen-bearing molecules are more difficult to observe than oxygen-bearing ones, mainly due to the lower abundance of nitrogen in the interstellar medium.
Posted inAstrochemistry, Astrogeology, Comets and Asteroids, Exoplanets, -moons, -comets, Meteorites & Asteroids, Status Report
Carbonaceous Chondrites Provide Evidence For Late-stage Planetesimal Formation In A Pressure Bump
Carbonaceous chondrites are samples from planetesimals that formed 2-4 million years after solar system formation began.
![Overview of the MIRI-MRS spectra of the three T Tauri disks along with ALMA views of their dust emission for illustrative purposes. The mid-IR emission is dominated by a dust continuum with particularly flat silicate features in DL Tau and V1094 Sco, revealing large micron-sized grains with a prominent silica feature. The 13-16 µm region shows a wealth of molecular features with a prominent C2H2, HCN, and CO2 features outlined in Fig. 2. In addition the pure rotational lines of H2 and the Ne [II] line are seen in all three disks. -- astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/04/MINDS.png?resize=1200%2C720&ssl=1)
Posted inAstrochemistry, Astrogeology, Exoplanets, -moons, -comets, Status Report
MINDS: Intertwined Evolution Of Dust And Gas In Large Planet-forming Disks. A Diversity Driven By Halted Pebble Drift?
(Abridged) We aim to investigate the inner regions of large and massive disks orbiting T Tauri stars, thought to be progenitors of systems with wide-orbit planets and possible cases of […]
Posted inAstrochemistry, Astrogeology, Comets and Asteroids, Exoplanets, -moons, -comets, Gaia - Planetary Perspectives, Lava / magma ocean / Volcanic Worlds, Meteorites & Asteroids, Status Report, Water/Hycean Worlds & Oceanography
From Dust to Planets — A Chemical Perspective
Chemical and chronological information preserved in meteorites permits the reconstruction of events and processes in the solar nebula from the formation of the first solids to the accretion of planetary […]
![[LEFT] Final planet mass vs pebble flux across the snowline at time of insertion. Plots A and B are coloured by the planet’s initial and final semi-major axes respectively. Plot C is coloured by the planet’s insertion time 𝑡0, and plot D is coloured by the characteristic disk radius 𝑅0. Plot E is coloured by the disk’s 𝛼 parameter, and plot F is coloured by the fragmentation velocity 𝑣frag. All plots contain outlined numbered points, which correspond to the points numbered in Fig. 2. [RIGHT Final planet mass vs pebble flux across the snowline at 1 Myr. Plots A and B are coloured by the planet’s final and initial semi-major axes respectively. Plot C is coloured by the planet’s insertion time 𝑡0, and plot D is coloured by the characteristic disk radius 𝑅0. Plot E is coloured by the disk’s 𝛼 parameter, and plot F is coloured by the fragmentation velocity 𝑣frag. All plots contain outlined numbered points, which correspond to the points numbered in Fig. 2. -- astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/04/Simulating-the-interplay.png?resize=1200%2C760&ssl=1)
Posted inAstrochemistry, Astrogeology, Comets and Asteroids, Exoplanets, -moons, -comets, Status Report
Simulating The Interplay Between The Snowline Pebble Flux And Ongoing Planet Formation And Migration
Pebble drift plays a central role in modern planet formation models. In this work we carry out planet formation simulations (including pebble accretion and migration) for a range of disc […]
Posted inAstrochemistry, Astrogeology, Biochemistry & Organic Chemistry, Exoplanets, -moons, -comets, Icy Worlds, Imaging & Spectroscopy, Status Report
Icy Volatile Enhancements in Evolving Protoplanetary Disks
Protoplanetary disk ice lines shape a multitude of planet formation processes, setting the environmental composition through evolution.
Posted inAstrogeology, Astronomy & Telescopes, Exoplanets, -moons, -comets, Gas Giants, Status Report, Stellar Cartography
Webb Redefines The Dividing Line Between Planets And Stars
Planets, like those in our Solar System, form in a bottom-up process where small bits of rock and ice clump together and grow larger over time. But the heftier the […]
Posted inAstrogeology, Exoplanets, -moons, -comets, Status Report
Dust Processing in Protoplanetary Discs From Infall to Dispersal: the Origin of Solar System Isotopic Heterogeneities
The nucleosynthetic heterogeneity between different asteroids and planets is well established. These isotopic variations manifest themselves at the part per millions level or larger, in isotopes that were synthesised in […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Status Report, Stellar Cartography
Exoplanet Orbital Distribution Around FGK Sun-like Host Stars II: A Valley In The Orbital Semi-major Axis Distribution Of Sub-Neptunes
More than one hundred years ago, physics has been revolutionized when people realized that electronic orbitals, or electromagnetic interactions in general, are quantized. Now, in this study, we are presenting […]