![LDPI–ReTOF mass spectrum obtained after the deposition of 40 ML pure NH3 ice at 15 K (red), without VUV irradiation. A reference mass spectrum obtained for a bare, clean substrate is presented for comparison (black). The spectra are offset for clarity -- [astro-ph.IM]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Quantifying.png?resize=1200%2C720&ssl=1)
[astro-ph.IM] Gas–grain astrochemical models predict that a substantial fraction of elemental nitrogen in dense cores and protoplanetary disks is locked in molecular nitrogen (N2), in the gas or ice phase, […]
astrochemistry
Posted inAstrochemistry
Rotational Spectroscopy And Astronomical Search Of Propane-1-thiol (CH3CH2CH2SH) And Propane-2-thiol ((CH3)2CHSH)
[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 […]
![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 […]
![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.
![Top view schematic of the experimental geometry at the PWK1 plasma wind tunnel facility. The geometrical thickness 𝑠 denotes the extent of the radiating plasma along the line of sight as observed by the Echelle spectrometer. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Determining.png?resize=1200%2C718&ssl=1)
Posted inMeteorites & Asteroids
Determining Elemental Composition In Laboratory Meteorite Ablation Spectra Through Radiative Transfer Modeling
[astro-ph.EP] Laboratory simulations of meteor ablation provide a critical quantitative link between the chemical composition of meteoroids and their observed spectral features.
Posted inComets and Asteroids
Fragmentation Dynamics of Pristine Interstellar Comets: An Exploratory Multi-Physics Simulation Study
[astro-ph.EP] We present an exploratory numerical model for the thermal evolution and fragmentation of pristine interstellar comets during a first passage through the inner Solar System, and we apply it […]
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 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.
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 […]