The Mystery of Unidentified Infrared Emission Bands
Sun Kwok
TL;DR
This paper reviews the properties and models of unidentified infrared emission bands, emphasizing their significance as a large carbon reservoir and their role in interstellar processes, highlighting the importance of identifying their carriers.
Contribution
It summarizes current spectral properties and discusses various models for the chemical carriers of UIE bands, emphasizing the need for correct identification.
Findings
UIE bands are widespread in the Universe.
They represent a significant carbon reservoir.
Understanding their carriers is crucial for galactic studies.
Abstract
A family of unidentified infrared emission (UIE) bands has been observed throughout the Universe. The current observed spectral properties of the UIE bands are summarized. These properties are discussed in the frameworks of different models of the chemical carriers of these bands. The UIE carriers represent a large reservoir of carbon in the Universe, and play a significant role in the physical and chemical processes in the interstellar medium and galactic environment. A correct identification of the carrier of the UIE bands is needed to use these bands as probes of galactic evolution.
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