An inherited complex organic molecule reservoir in a warm planet-hosting disk

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作者
Alice S. Booth
Catherine Walsh
Jeroen Terwisscha van Scheltinga
Ewine F. van Dishoeck
John D. Ilee
Michiel R. Hogerheijde
Mihkel Kama
Hideko Nomura
机构
[1] Leiden University,Leiden Observatory
[2] University of Leeds,School of Physics and Astronomy
[3] Max Planck Institut für Extraterrestrishe Physik,Anton Pannekoek Institute for Astronomy
[4] University of Amsterdam,Department of Physics and Astronomy
[5] University College London,Tartu Observatory
[6] University of Tartu,undefined
[7] National Astronomical Observatory of Japan,undefined
来源
Nature Astronomy | 2021年 / 5卷
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摘要
Quantifying the composition of the material in protoplanetary disks is essential to determining the potential for exoplanetary systems to produce and support habitable environments. When considering potential habitability, complex organic molecules are relevant, key among which is methanol (CH3OH). Methanol primarily forms at low temperatures via the hydrogenation of CO ice on the surface of icy dust grains and is a necessary basis for the formation of more complex species such as amino acids and proteins. We report the detection of CH3OH in a disk around a young, luminous A-type star, HD 100546. This disk is warm and therefore does not host an abundant reservoir of CO ice. We argue that the CH3OH cannot form in situ, and hence that this disk has probably inherited complex-organic-molecule-rich ice from an earlier cold dark cloud phase. This is strong evidence that at least some interstellar organic material survives the disk-formation process and can then be incorporated into forming planets, moons and comets. Therefore, crucial pre-biotic chemical evolution already takes place in dark star-forming clouds.
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页码:684 / 690
页数:6
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