indene Archives

This image shows a wide-field view of part of the Taurus Molecular Cloud, about 450 light-years from Earth. Its relative closeness makes it an ideal place to study the formation of stars. Many dark clouds of obscuring dust are clearly visible against the background stars. Credit: Digitized Sky Survey 2. Acknowledgment: Davide De Martin.

Astrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Impact events, Interstellar, Status Report

How Do Organic Molecules Survive in Space?

by Keith CowingJune 10, 2025June 10, 2025

The discovery of small polycyclic aromatic hydrocarbon (PAH) molecules in interstellar clouds through radio astronomy and observations of infrared (IR) emission bands from PAHs with unprecedented sensitivity by the James […]

Top left panel (a): Comparison of the UV absorption of indene with an elevated value at λ < 0.19 µm (“higher Cabs”; black long-dashed line) and that with the absorption at λ < 0.19 µm extrapolated from that at λ > 0.19 µm (“lower Cabs”; magenta dashed line). The UV absorption at λ > 0.19 µm for both cases is the same as Figure 1. Bottom left panel (b): Comparison of the MMP83 interstellar radiation field (red) with the radiation fields represented by different stellar effective temperatures (Teff = 40, 000 K: blue; Teff = 22, 000 K: cyan; and Teff = 8, 000 K: green). All the radiation intensities are normalized at λ = 0.2 µm. Right panel (c): Comparison of the model IR emission spectrum of indene in the diffuse ISM calculated with an elevated UV absorption at λ < 0.19 µm (dashed blue line) and that with the extrapolated UV absorption at λ < 0.19 µm (solid red line). -- astro-ph.GA

Astrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Imaging & Spectroscopy, Status Report

Infrared Emission of Specific Polycyclic Aromatic Hydrocarbon Molecules: Indene

by Keith CowingMarch 12, 2024March 12, 2024

Polycyclic aromatic hydrocarbon (PAH) molecules have long been suggested to be present in the interstellar medium (ISM). Nevertheless, despite their expected ubiquity and sustained searching efforts, identifying specific interstellar PAH […]

Astrochemistry, Interstellar, Press Release

Polyaromatic Hydrocarbons with an Imperfect Aromatic System as Catalysts of Interstellar H2 Formation

by Keith CowingOctober 25, 2022October 25, 2022

Although H2 is the simplest and the most abundant molecule in the Universe, its formation in the interstellar medium, especially in the photodissociation regions is far from being fully understood.

indene

How Do Organic Molecules Survive in Space?

Infrared Emission of Specific Polycyclic Aromatic Hydrocarbon Molecules: Indene

Polyaromatic Hydrocarbons with an Imperfect Aromatic System as Catalysts of Interstellar H2 Formation

Roman Space Telescope: Enabling Images Of Distant Worlds

NASA Solar System Exploration Research Virtual Institute (SSERVI) Cooperative Agreement Notice (NNH26ZDA016C) Final Text And Due Dates

Interstellar Aromatic Infrared Bands: IR Absorption Spectroscopy Of The Lowest Triplet State Of Naphthalene

The Highly Unusual Behavior And Chemical Composition Of Interstellar Comet 2I/Borisov

Volatile Depletion In Rocky Planets As A Chemical Fingerprint Of Hybrid Accretion