The unidentified infrared emission (UIE) features at 3.3, 6.2, 7.7, 8.6, 11.3 and 12.7 micron are ubiquitously seen in a wide variety of astrophysical regions and commonly attributed to polycyclic […]
Polycyclic Aromatic Hydrocarbon
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Imaging & Spectroscopy, Interstellar, Status Report
JWST Observations of Starbursts: Polycyclic Aromatic Hydrocarbon Emission at the base of the M 82 Galactic Wind
We present new observations of the central 1 kpc of the M 82 starburst obtained with the James Webb Space Telescope (JWST) near-infrared camera (NIRCam) instrument at a resolution ~0.05″-0.1″ […]
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Imaging & Spectroscopy, Status Report
The Infrared Absorption Spectrum of Phenylacetylene and its Deuterated Isotopologue in the Mid- to Far-IR
Anharmonicity strongly influences the absorption and emission spectra of polycyclic aromatic hydrocarbon (PAH) molecules. Here, ion-dip spectroscopy experiments together with detailed anharmonic computations reveal the presence of fundamental, overtone, as […]
Posted inAstrochemistry, Astronomy & Telescopes, Imaging & Spectroscopy, Interstellar, Status Report
An Ultraviolet Spectral Study Of Fullerene-rich Planetary Nebulae
Several planetary nebulae (PNe) have been found to contain both polycyclic aromatic hydrocarbon (PAH-like) species and fullerenes (C60) distinguished by their mid-infrared emission.
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Imaging & Spectroscopy, Status Report
Polycyclic Aromatic Hydrocarbon (PAH) Luminous Galaxies In JWST CEERS Data
It has been an unanswered question how many dusty galaxies have been undetected from the state-of-the-art observational surveys.
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Interstellar, Status Report
Astronomical Diffuse Interstellar Bands Analyzed by Hydrocarbon Pentagon-Hexagon Combined PAH Molecules
This study theoretically predicted the specific Polycyclic Aromatic Hydrocarbon (PAH) molecules to satisfy both astronomically observed Diffuse Interstellar Bands (DIB) and Infrared Bands (IR).
Posted inAstrochemistry, Press Release
Probing Computational Methodologies In Predicting Mid-infrared Spectra For Large Polycyclic Aromatic Hydrocarbons
We extend the prediction of vibrational spectra to large sized polycyclic aromatic hydrocarbon (PAH) molecules comprising up to ~ 1500 carbon atoms by evaluating the efficiency of several computational chemistry […]
Posted inAstrochemistry
Polycyclic Aromatic Hydrocarbon Formation in O-rich Planetary Nebulae
Polycyclic aromatic hydrocarbons (PAHs) have been observed in O-rich planetary nebulae towards the Galactic Bulge. This combination of oxygen-rich and carbon-rich material, known as dual-dust or mixed chemistry, is not […]