Investigating the temperature and density structures of gas in massive protoclusters is crucial for understanding the chemical properties therein.
astro-ph.GA]
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Imaging & Spectroscopy, Status Report
KAgoshima Galactic Object Survey With Nobeyama 45-metre Telescope by Mapping in Ammonia Lines (KAGONMA): Discovery of Parsec-scale CO Depletion in the Canis Major Star-forming Region
In observational studies of infrared dark clouds, the number of detections of CO freeze-out onto dust grains (CO depletion) at pc-scale is extremely limited, and the conditions for its occurrence […]
Posted inAstrochemistry, Astronomy & Telescopes, Biosignatures & Paleobiology, Imaging & Spectroscopy, Status Report
The Evolution Of Sulphur-bearing Molecules In High-mass Star-forming Cores
To understand the chemistry of sulphur (S) in the interstellar medium, models need to be tested by observations of S-bearing molecules in different physical conditions.
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Imaging & Spectroscopy, Interstellar, Status Report
A Constant N2H+(1-0)-to-HCN(1-0) Ratio On Kiloparsec Scales
Nitrogen hydrides such as NH3 and N2H+ are widely used by Galactic observers to trace the cold dense regions of the interstellar medium.
Posted inAstrochemistry, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Imaging & Spectroscopy, Status Report
Deep Search For Glycine Conformers In Barnard 5
One of the most fundamental hypotheses in astrochemistry and astrobiology states that crucial biotic molecules like glycine (NH2CH2COOH) found in meteorites and comets are inherited from early phases of star […]
Posted inAstrochemistry, Astronomy & Telescopes, Press Release
Contribution of Polycyclic Aromatic Hydrocarbon Ionization To Neutral Gas Heating In Galaxies
The ionization of polycyclic aromatic hydrocarbons (PAHs), by ultraviolet (UV) photons from massive stars is expected to account for a large fraction of the heating of neutral gas in galaxies. […]
Posted inAstrochemistry
Astrochemical Model to Study the Abundances of Branched Carbon-chain Molecules in a Hot Molecular Core with Realistic Binding Energies
Straight-chain (normal-propyl cyanide, n – C3H7CN) and branched-chain (iso-propyl cyanide, i – C3H7CN) alkyl cyanides are recently identified in the massive star-forming regions (Sgr B2(N) and Orion). These branched-chain molecules […]
Posted inAstrochemistry, Interstellar, Press Release
The Effects Of Local Stellar Radiation And Dust Depletion On Non-equilibrium Interstellar Chemistry
Interstellar chemistry is important for galaxy formation, as it determines the rate at which gas can cool, and enables us to make predictions for observable spectroscopic lines from ions and […]
Posted inAstrochemistry, Interstellar, Press Release
Mapping the aliphatic hydrocarbon content of interstellar dust in the Galactic plane
We implement a new observational method for mapping the aliphatic hydrocarbon content in the solid phase in our Galaxy, based on spectrophotometric imaging of the 3.4 μm absorption feature from […]
Posted inAstrochemistry
Infrared Spectra Of Complex Organic Molecules In Astronomically Relevant Ice Mixtures. V. Methyl cyanide (acetonitrile)
The increasing sensitivity and resolution of ground-based telescopes have enabled the detection of gas-phase complex organic molecules (COMs) across a variety of environments. Many of the detected species are expected […]