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- Seminars and Workshops
- Institute of Astronomy and Astrophysics
- Location
R1203 of the Astronomy-Mathematics Building, National Taiwan University
- Speaker Name
Sun Kwok [University of Hong Kong]
- State
Definitive
- Url
2023-10-25 14:20 - 15:20
Colloquium
Complex Organics in Space: a changing view of the cosmos
Abstract
Planetary explorations have revealed that complex organics are widely present in the Solar System. Infrared spectroscopic observations have discovered that complex organics are synthesized in large quantities in planetary nebulae and distributed throughout the Galaxy. Signatures of organics are found in distant galaxies, as early as 1.5 billion years after the Big Bang. A number of unsolved spectral phenomena such as diffuse interstellar bands, extended red emissions, 220 nm feature, and unidentified infrared emission bands are likely to originate from organics. In this talk, we will discuss what are the possible chemical structures of the carriers of these phenomena, and how these organics are synthesized abiotically in the Universe.
References
Kwok, S. 2022, The Mystery of Unidentified Infrared Emission Bands, Astrophys. Space Science, 367, 16
Kwok, S. 2016, Complex organics in space: from Solar System to distant galaxies, Astr. & Astrophy. Rev., 24, 8
Kwok, S. and Zhang, Y. 2011, Mixed aromatic/aliphatic organic nanoparticles as carriers of unidentified infrared emission features, Nature, 479, 80-83
Kwok, S. 2011, Organic Matter in the Universe, Wiley
