Detection of CO and Ethane in Comet 21P/Giacobini-Zinner: Evidence for Variable Chemistry in the Outer Solar Nebula
Detection of CO and Ethane in Comet 21P/Giacobini-Zinner: Evidence for Variable Chemistry in the Outer Solar Nebula
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在彗星 21P/Giacobini-Zinner 中检测到 CO 和乙烷：太阳系外星云中可变化学的证据
作者：
M. Mumma;M. DiSanti;M. DiSanti;N. Russo;N. Russo;K. Magee;T. Rettig
在一颗可能起源于柯伊伯带的短周期彗星上发现了乙烷和一氧化碳。与来自太阳星云巨行星区域的两颗彗星百武彗星和海尔-波普彗星相比，乙烷的含量要少得多，这表明彗星前冰中的乙烷有日心梯度。有人认为，来自年轻太阳的x射线可能是造成这一现象的原因。
Ethane and carbon monoxide were detected in a short-period comet of probable Kuiper Belt origin. Ethane is substantially less abundant compared with Hyakutake and Hale-Bopp, two comets from the giant-planet region of the solar nebula, suggesting a heliocentric gradient in ethane in precometary ices. It is argued that processing by X-rays from the young Sun may be responsible.