The nuclear-spin chemistry of interstellar water is investigated using the University of Grenoble Alpes Astrochemical Network (UGAN). This network includes reactions involving the different nuclear-spin states of the hydrides of […]
astro-ph.GA]
Posted inAstrochemistry
First Extragalactic Detection Of A Phosphorus-bearing Molecule With ALCHEMI: Phosphorus Nitride (PN)
Phosphorus (P) is a crucial element for life given its central role in several biomolecules. P-bearing molecules have been discovered in different regions of the Milky Way, but not yet […]
Posted inAstrochemistry
Expanding The Submillimeter Wave Spectroscopy And Astronomical Search For Thioacetamide (CH3CSNH2) In The ISM
Thioacetamide (CH3CSNH2) is the sulfur analog to acetamide (CH3CONH2) and it is a viable candidate to search for in astronomical environments specifically toward regions where other S-bearing molecules have been […]
Posted inAstrochemistry
The Trans/cis Ratio Of Formic, HCOOH, And Thioformic, HC(O)SH, Acids In The Interstellar Medium
We studied theoretically the cis-trans isomerization reactions of two astrophysically relevant acids, formic acid (HCOOH) and thioformic acid (HC(O)SH), where the latter has recently been discovered in space. We also […]
Posted inAstrochemistry
Hydrogenation Of Accreting C-atoms And CO Molecules — Simulating Ketene And Acetaldehyde Formation Under Dark And Translucent Cloud Conditions
Simple and complex organic molecules (COMs) are observed along different phases of star and planet formation and have been successfully identified in prestellar environments such as dark and translucent clouds. […]
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Astrochemistry With The Orbiting Astronomical Satellite For Investigating Stellar Systems (OASIS)
Chemistry along the star- and planet-formation sequence regulates how prebiotic building blocks — carriers of the elements CHNOPS — are incorporated into nascent planetesimals and planets. Spectral line observations across […]
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Astrochemical Modelling of Infrared Dark Clouds
Infrared Dark Clouds (IRDCs) are cold, dense regions of the interstellar medium that are likely to represent the initial conditions for massive star and star cluster this is thus important […]
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Polycyclic Aromatic Hydrocarbons, The Anomalous Microwave Emission, And Their Connection To The Cold Neutral Medium
Using new large area maps of the cold neutral medium (CNM) fraction, fCNM, we investigate the relationship between the CNM, the abundance of polycyclic aromatic hydrocarbons (PAHs), and the anomalous […]
Posted inAstrochemistry
Efficient Formation Pathway Of Methyl Formate: The Role Of OH Radicals On Ice Dust
Three structural isomers of the C2H4O2 molecule, namely, methyl formate (MF; HCOOCH3), acetic acid (AA; CH3COOH), and glycol aldehyde (GA; HOCH2CHO), have attracted considerable attention as targets for understanding pathways […]
Posted inAstrochemistry
Discovery Of Two Isomers Of Ethynyl Cyclopentadiene In TMC-1: Abundances of CCH And CN Derivatives Of Hydrocarbon Cycles
We report the detection of two isomers of ethynyl cyclopentadiene (c-C5H5CCH), namely 1- and 2-ethynyl-1,3-cyclopentadiene, in the direction of TMC-1. We derive column densities of (1.4 +/- 0.2)e12 cm-2, and […]