Using JWST/MIRI observations, we report the detection of CO2 ice in the dusty torus of the planetary nebula NGC 6302, an environment generally considered hostile to fragile molecular species and […]
astro-ph.GA
Posted inBiosignatures & Paleobiology, Intelligence & Language, SETI & Technosignatures, Status Report
Constraining the Lifespan of Intelligent Technological Civilization in the Galaxy
In this work, we explore constraints on the emergence and longevity of technologically intelligent civilizations in our Galaxy, considering the Fermi paradox.
Posted inAnalog Studies, Astrochemistry, Astrogeology, Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Icy Worlds, Imaging & Spectroscopy, Status Report
Experimental And Computational Studies Of The Hydrogenation Of Carbon Disulfide (CS2) On Ice Analogues
Carbon disulfide (CS2) is one of the sulfur-bearing species expected to be present in the interstellar medium (ISM). In this study, we investigated the surface reactions of solid CS2 with […]
![Simulation results of abundance ratios [H2O2]/[H2O] (black lines), [H2]/[H2O] (orange lines), and [O2]/[H2O] (blue lines) with our model (model A) at 16 K (solid lines) and 77 K (dashed lines). The gray shaded and line filled regions show the experimental results of [H2O2]/[H2O] by Gomis et al. (2004a) at 16 and 77 K, respectively, with an assumed uncertainty of a factor of 3. -- astro-ph.GA](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/02/Simulation-of-proton-radiolysis.png?resize=1200%2C719&ssl=1)
Posted inAI - Data - Apps - Cybernetics, Astrochemistry, Astrogeology, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Icy Worlds, Imaging & Spectroscopy, Interstellar, Status Report
Simulation Of Proton Radiolysis Of H2O And O2 Ices With The Nautilus Code
The radiolysis effect of cosmic rays (CRs) plays an important role in the chemistry in molecular clouds. CRs can dissociate the molecules on dust grains, producing reactive suprathermal species and […]
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Imaging & Spectroscopy, Interstellar, Status Report
Interstellar Formation of Thioethanal (CH3CHS). Gas-Phase and Ice-Surface Mechanisms involving Secondary Sulfur Products
The formation pathways of sulfur-bearing species in the interstellar medium are crucial to understand astrochemical processes in cold molecular clouds and to gain new insights about the sulfur budget in […]
![Overview of the L1544 (LEFT panel) and IRAS 16293–2422 (RIGHT panel) regions as traced by the Herschel3 continuum maps at 350 𝜇m. The white contours correspond to [5,7,9,12,14]𝜎, where 𝜎 is 12 MJy sr−1 in L1544, and 1.1 MJy sr−1 in IRAS 16293–2422, respectively. The FoVs of the GBT observations are shown as blue circles – solid line for Ku-band and dashed line for X-band observations (see Sect. 3). Green diamonds identify the continuum (∼1.3 mm) peak position in L1544 (Ward-Thompson et al. 1999) and the position of the A/B, and E objects in IRAS 16293–2422 (Kahle et al. 2023). The size of the Herschel beam (25′′) is shown in the bottom left corner, while the scale bar is shown in the bottom right. -- astro-ph.GA](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/02/Carbon-chain-diversity.png?resize=1200%2C716&ssl=1)
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Imaging & Spectroscopy, Interstellar, Status Report
Carbon Chain Diversity In L1544 And IRAS 16293-2422: An Astrochemical Pathfinder Study For The SKAO
Astrochemical observations have revealed a surprisingly high level of chemical complexity, including long carbon chains, in the earliest stages of Sun-like star formation.
Posted inAI - Data - Apps - Cybernetics, Astrochemistry, Biophysics, Biosignatures & Paleobiology, Imaging & Spectroscopy, Interstellar, Status Report
Machine Learning Exploration Of Binding Energy Distributions Of H2O At Astrochemically Relevant Dust Grain Surfaces
Binding energies (BEs) of adsorbates on interstellar dust grains critically control adsorption, desorption, diffusion, and surface reactivity, and therefore strongly influence astrochemical models of star- and planet-forming regions.
Posted inAstrochemistry, Astrogeology, Biosignatures & Paleobiology, Icy Worlds, Imaging & Spectroscopy, Interstellar, Status Report
A Chemistry-First Centered Icy Chemical Inventory of Protostellar Sources with JWST
The chemical evolution in star forming regions is driven by the interplay between gas and ice mantles. Identifying the ice compositions at the early stage of star formation thus provides […]
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Imaging & Spectroscopy, Interstellar, Status Report
Astrochemistry: A Gas-phase “Top-down” Chemical Link Between Aldehydes And Alcohols
Alcohols and aldehydes represent two key classes of interstellar complex organic molecules (COMs). This work seeks to better understand their possible chemical connections, with a focus on such molecules in […]
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Imaging & Spectroscopy, Interstellar, Status Report
Atom Addition Formation of Thionylimide (HNSO) on Interstellar Dust Grains: Chemical Routes Requiring Oxygen And Nitrogen Atom Surface Diffusion
We investigate the formation of the recently detected HNSO molecule using quantum chemical calculations on ices and astrochemical models in tandem.