论文标题
彗星中的无定形冰：证据和后果
Amorphous ice in comets: evidence and consequences
论文作者
论文摘要
当在星际培养基中发现的温度和压力在蒸气中从蒸气中积聚在蒸气中，在星际培养基中以及太阳原理磁盘的寒冷，低密度外区域中从蒸气中积聚时，冰自然形成。因此，自成立以来，它是彗星和其他原始体中预期的冰形式。然而，尽管有期望，但彗星中无定形冰的观察证据仍然很大程度上是间接的。这既是因为无定形冰的光谱特征都是微妙的，而且我们拥有高质量数据的太阳系对象大多太近，太阳太热了，对于可以检测到的表面附近的无定形冰就无法生存。本章回顾了无定形冰的特性，这是其存在的证据及其对彗星行为的后果。
Ice naturally forms in the disordered or ``amorphous'' state when accreted from vapor at temperatures and pressures found in the interstellar medium and in the frigid, low density outer regions of the Sun's protoplanetary disk. It is therefore the expected form of ice in comets and other primitive bodies that have escaped substantial heating since formation. Despite expectations, however, the observational evidence for amorphous ice in comets remains largely indirect. This is both because the spectral features of amorphous ice are subtle and because the solar system objects for which we possess high quality data are mostly too close to the Sun and too hot for amorphous ice to survive near the surface, where it can be detected. This chapter reviews the properties of amorphous ice, the evidence for its existence and its consequences for the behavior of comets.
