![Ka = 0 rotational transitions of HNCOH+ identified towards G+0.693 and sorted by increasing frequency (see also Table B.1). The LTE fit of HNCOH+ is plotted with a red line, while the blue line depicts the emission from all the molecules identified to date in our survey, including HNCOH+ (observed spectra shown as gray histograms). The molecular structure of HNCOH+ is shown in the bottom right. The quantum numbers of each rotational transition (J + 1 → J) are indicated in the upper left of each panel. Blue labels show the rest of identified species contributing to the observed spectra.-- [astro-ph.GA]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/Detection.png?resize=1200%2C719&ssl=1)
[astro-ph.GA] Only five out of the ∼350 molecules detected in the interstellar medium (ISM) carry the isocyanate functional group (NCO), the essential substructure of peptide bonds in proteins. Among them […]
interstellar medium
Posted inAstrochemistry
Complex Organic Molecules In Protostars with ALMA Spectral Surveys (COMPASS) VIII. First Interstellar Detection Of Fully Deuterated Methyl Cyanide
[astro-ph.GA] Deuteration is a powerful metric to gain insight into the formation pathways of interstellar molecules in star forming regions.
![A comparison of the dominant heating and cooling mechanism for different times and at the time of the maximum temperature. Each model is started at 𝑇 = 10 K. -- [astro-ph.GA]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/UCLCHEM.png?resize=1200%2C716&ssl=1)
Posted inAstrochemistry
UCLCHEM 4.0: An Open Source Gas-grain Astrochemistry Simulation Framework
[astro-ph.GA] Astrochemical modeling is a key tool for the understanding of the formation and destruction of molecules in the dense gas of the interstellar medium, as observed by modern day […]
Posted inAstrochemistry
Chemical Abundance Patterns at z=1-7: Carbon, Nitrogen, Neon, Sulphur, and Argon Abundances From JWST Spectroscopy
[astro-ph.GA] The relative abundances of chemical elements in the interstellar medium (ISM) trace the history of star formation and chemical enrichment in galaxies.
![From interstellar molecules to biomolecules. [astro-ph.IM]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/Frontiers.png?resize=1200%2C701&ssl=1)
Posted inAstrochemistry
Frontiers Of Chemical Complexity In The Interstellar Medium: Unveiling The Cosmic Origins Of life
[astro-ph.IM] The interstellar medium (ISM) contains a rich molecular inventory that provides a unique window into the chemistry operating during star and planet formation and its connection to prebiotic chemistry.
Posted inAstrochemistry
Complex Organic Molecules In Protostars With ALMA Spectral Surveys (COMPASS) VII. First Interstellar Detection Of Fully Deuterated Methanol
[astro-ph.GA] There have been no robust identifications of fully deuterated methanol, CD3OD, in the interstellar medium (ISM) to date.
![The per-tile processing chain, applied to the Detector-4 tile of Fig. 1. (a) After flag masking and zodiacal-light subtraction, the input to the stellar subtraction. (b) After fitting and subtracting the empirical PSF at every catalogued source above the magnitude limit, with the saturated cores of the brightest stars masked. (c) After the median filter and the Gaussian smoothing to 2.6 ′ , which is what is coadded into the HEALPix maps. All three panels share a single histogram-equalised colour scale. -- [astro-ph.GA]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/A-Full-Sky.png?resize=1200%2C637&ssl=1)
Posted inAstrochemistry
A Full-Sky SPHEREx Map of Integrated 3.3 And 3.4 μm PAH Emission
[astro-ph.GA] Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous in the interstellar medium and are among its smallest carbonaceous grains.
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 […]
Posted inAstrochemistry
First Detection Of C2H+ In The Interstellar Medium
[astro-ph.GA] Despite the detection of nearly 350 molecules in the interstellar medium, almost half of which are carbon chains, the pathways that build molecular complexity remain poorly understood.