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The puzzling behavior of HNCO isomers in molecular clouds
Context. Isocyanic acid (HNCO) has been observed in different physical environments in the interstellar medium (ISM) and in external galaxies. HNCO has several metastable isomers with a groundExpand
GAS-GRAIN MODELING OF ISOCYANIC ACID (HNCO), CYANIC ACID (HOCN), FULMINIC ACID (HCNO), AND ISOFULMINIC ACID (HONC) IN ASSORTED INTERSTELLAR ENVIRONMENTS
Isocyanic acid (HNCO) is a well-known interstellar molecule. Evidence also exists for the presence of two of its metastable isomers in the interstellar medium: HCNO (fulminic acid) and HOCN (cyanicExpand
OBSERVATIONS OF THE [HNCS]/[HSCN] RATIO IN Sgr B2 AND TMC-1: EVIDENCE FOR LOW-TEMPERATURE GAS-PHASE CHEMISTRY
Millimeter observations of isothiocyanic acid (HNCS) and its higher energy isomer, thiocyanic acid (HSCN), have been carried out toward Sgr?B2 and TMC-1 using the 12?m telescope of the Arizona RadioExpand
Possible gas-phase syntheses for seven neutral molecules studied recently with the Green Bank Telescope
Aims. With the Green Bank telescope (GBT), seven neutral molecules have been newly detected or confirmed towards either the cold interstellar core TMC-1 or the hot core source Sgr B2(N) within theExpand
Chemical Simulations of Prebiotic Molecules: Interstellar Ethanimine Isomers
The E- and Z-isomers of ethanimine (CH3CHNH) were recently detected toward the star-forming region Sagittarius (Sgr) B2(N) using the Green Bank Telescope PRIMOS cm-wave spectral data, and imaged byExpand
Femtosecond dynamics of flavin cofactor in DNA photolyase: radical reduction, local solvation, and charge recombination.
TLDR
The observed temporal absorption evolution revealed two initial electron-transfer reactions, occurring in 11 and 42 ps with the neighboring aromatic residues of W382 and F366, respectively, and a new transient absorption, observed at 550 nm previously in photolyase, was found from the excited-state neutral radical. Expand
On the encounter desorption of hydrogen atoms on an ice mantle
At low temperatures (∼10 K), hydrogen atoms can diffuse quickly on grain ice mantles and frequently encounter hydrogen molecules, which cover a notable fraction of grain surface. The desorptionExpand
Spatial Variation of the Chemical Properties of Massive Star-forming Clumps
We selected 90 massive star-forming clumps with strong N2H+, HCO+, HCN, and HNC emission from the Millimetre Astronomy Legacy Team 90 GHz survey. We obtained Herschel data for all 90 sources and NRAOExpand
The temperature-dependence of rapid low temperature reactions: experiment, understanding and prediction.
TLDR
These reactions and rate coefficients have been incorporated into a purely gas-phase model (osu2005) of ISC chemistry and it is suggested which reactions between the radicals, C(3P), O( 3P), N(4S), CH, C2H and CN, and carbon chain molecules (Cn) and cyanopolyynes are likely to be fast at the temperature of dense ISCs. Expand
New Theoretical Results Concerning the Interstellar Abundance of Molecular Oxygen
The low abundance of molecular oxygen in cold cores of interstellar clouds poses a continuing problem to modelers of the chemistry of these regions. In chemical models O2 is formed principally by theExpand
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