The Unusual Volatile Composition of the Halley-Type Comet 8P/Tuttle: Addressing the Existence of an Inner Oort Cloud
The Unusual Volatile Composition of the Halley-Type Comet 8P/Tuttle: Addressing the Existence of an Inner Oort Cloud
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哈雷型彗星 8P/Tuttle 不寻常的挥发性成分：解决内部奥尔特云的存在问题
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发表时间：
2008
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通讯作者：
H. Kaeufl
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作者：
H. Boehnhardt;M. Mumma;G. Villanueva;M. DiSanti;B. Bonev;M. Lippi;H. Kaeufl
我们测量了有机挥发物（CH 4，CH 3OH，C2 H6，H2 CO），CO和水在彗星8 P/塔特尔，彗星从奥尔特云水库现在在一个短周期的哈雷型轨道。我们比较其组成与其他两个彗星在哈雷型轨道，并与彗星的“有机正常”和“有机耗尽”类。化学梯度预计在彗星形成区域的原行星盘，和一个单独的彗星应该反映其特定的遗产。如果哈雷型彗星如所提出的那样来自内部奥尔特云，我们没有看到可以将这些彗星与外部奥尔特云中存储的彗星区分开来的共同特征。
We measured organic volatiles (CH4, CH3OH, C2H6, H2CO), CO, and water in comet 8P/Tuttle, a comet from the Oort Cloud reservoir now in a short-period Halley-type orbit. We compare its composition with two other comets in Halley-type orbits, and with comets of the “organics-normal” and “organics-depleted” classes. Chemical gradients are expected in the comet-forming region of the protoplanetary disk, and an individual comet should reflect its specific heritage. If Halley-type comets came from the inner Oort Cloud as proposed, we see no common characteristics that could distinguish such comets from those that were stored in the outer Oort Cloud.