[astro-ph.GA] This study focuses on propanethiol (or propyl mercaptan, C3H7SH), a sulfur analogue of propanol and a key target for investigating interstellar sulfur chemistry. We report the laboratory rotational spectroscopic […]
astro-ph.GA
![Schematic illustration of the ablation scheme used at the MATRI2CES setup. The laser fires at 5 Hz while the substrate is moved downward by a motorized Y-translator, ensuring a fresh spot is probed with each shot. -- [astro-ph.GA]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/In-situ.png?resize=1200%2C720&ssl=1)
Posted inAstrochemistry
In situ Characterization Of Volatile And Refractory Hydrocarbons Produced By UV Photolysis Of Interstellar C2H2 Ice
[astro-ph.GA] Acetylene (C2H2) is commonly observed in star-forming regions, young stellar objects, and the Solar System.
Posted inAstrochemistry
Local Constraints On Alcohol–Thioalcohol Analogs In G35.2N
[astro-ph.GA] The chemistry of sulfur-bearing complex organic molecules in dense star-forming environments remains uncertain, partly because the dominant sulfur reservoirs in dense gas and ices are poorly identified. Alcohol–thioalcohol pairs […]
Posted inAstrochemistry
Glycine In The Interstellar Medium Revisited: Resolving Conformational Complexity Kinetically
[astro-ph.GA] Numerous attempts to detect glycine, a simple amino acid and a key building block of proteins in all life on Earth, in the interstellar medium have so far been […]
![Binding energies of CO, CO2 and NH3 on pristine and cavity-containing ice clusters consisting of 100 and 97 H2O molecules, respectively. The error bars represent the spread in adsorption energies across the three clusters. Dispersion energy as fraction of the total binding energy per species, site and functional. -- [astro-ph.GA]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/How-Small.png?resize=1200%2C719&ssl=1)
Posted inAstrochemistry
How Small is Large Enough? Determining Minimal Cluster Sizes for Molecule Adsorption on Interstellar Amorphous Ice
[astro-ph.GA] Binding energies of molecules on ice mantles are important to understand the evolution of molecular complexity in molecular clouds.
Posted inAstrochemistry
Interstellar Aromatic Infrared Bands: IR Absorption Spectroscopy Of The Lowest Triplet State Of Naphthalene
[astro-ph.GA] The aromatic infrared bands (AIBs), emission features observed ubiquitously across a wide variety of interstellar objects, are commonly attributed to radiative cooling of highly-excited ground-state vibrational levels of polycyclic […]
Posted inSETI & Technosignatures
Gaia DR3 Limits on Stellar Engine Technosignatures in Nearby Stars
[astro-ph.GA] An operating stellar engine that transfers momentum to its host star could produce an approximately persistent transverse acceleration during the Gaia Data Release 3 (DR3) observing epoch.
Posted inAstrochemistry
Catalytic Formation of H2 On Carbonaceous Dust Grains – Implications For Interstellar Observations
[astro-ph.GA] We use kinetic Monte Carlo (KMC) simulations to study molecular hydrogen formation on carbonaceous dust grain surfaces, validated against recent laboratory measurements of H2 formation on coronene films at […]
Posted inAstrochemistry
The Galactic Centre G+0.633-0.0604 Molecular Cloud: A New Gold Mine for Astrochemistry
[astro-ph.GA] Astrochemistry is living a golden age, with more than a quarter of the ~350 molecules in the current interstellar census having been detected over the last three years. One […]
![Observed spectra compared to laboratory data for CO (left), 13CO2 (middle), and H2O (right) ices on carbonaceous dust analogs. -- [astro-ph.GA]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/Molecule-specific.png?resize=1200%2C606&ssl=1)
Posted inAstrochemistry
Molecule-specific Diffusion And Desorption Of Interstellar Ices On Carbonaceous Dust
[astro-ph.GA] Interstellar ices form on dust grains in the coldest regions of molecular clouds and preserve key volatile reservoirs that could be incorporated into protoplanetary disks during star and planet […]