Astronomers discover complex organic matter in the Universe

Kwok, S. & Zhang, Y. : Mixed Aromatic/aliphatic organic nanoparticles as carriers of the

Unidentified IR emission features 不明紅外輻射現象 First observed by the Kuiper Airborne Observatory 初為空中天文台發現

The mystery of unidentified infrared emission bands不明紅外輻射現象之謎

Observations with space telescopes 數據由太空觀察取得 Spitzer Space Telescope Infrared Space Observatory 紅外線太空望遠鏡史匹哲太空望遠鏡

• The chemical structures of the organic compounds are much more complex than

findings • Organic compounds of such complexity can be produced by stars is surprising

Summary 結論 • Complex organics are all over the universe 宇宙中充滿複雜有機物 • the early

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Astronomers discover complex organic matter in the Universe 宇宙中發現了複雜的有機物質 Sun Kwok & Yong Zhang 郭新，張泳

Kwok, S. & Zhang, Y. : Mixed Aromatic/aliphatic organic nanoparticles as carriers of the unidentified infrared emission features, Nature, Oct 26, 2011

Unidentified IR emission features 不明紅外輻射現象 First observed by the Kuiper Airborne Observatory 初為空中天文台發現

The mystery of unidentified infrared emission bands不明紅外輻射現象之謎

Observations with space telescopes 數據由太空觀察取得 Spitzer Space Telescope Infrared Space Observatory 紅外線太空望遠鏡史匹哲太空望遠鏡

• The chemical structures of the organic compounds are much more complex than previously thought 化學結構比以前想像複雜 A mixed aromatic (ring) and aliphatic (chain) structures arranged in a disorganized manner 含有芳香族(環狀)和脂肪族(線狀) 的混合體

findings • Organic compounds of such complexity can be produced by stars is surprising 恆星可生 �有機物 • Their structures are similar to the organic matter found in meteorites化學結構和隕石中的有機物相似 Did the meteoritic organic matter come from stars? 隕石中的有機物是否外來？

Summary 結論 • Complex organics are all over the universe 宇宙中充滿複雜有機物 • the early Solar System may have been enriched by stellar organic products 早期的太陽系或被有機星塵感染

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