论文标题
跨纳普对物体的挥发性进化和气氛
Volatile evolution and atmospheres of Trans-Neptunian Objects
论文作者
论文摘要
在30-50 K时，Kuiper腰带表面的典型温度（例如Stern＆Trafton 2008），只有七个物种具有高于1 NBAR的升华压力（Fray＆Schmitt 2009）：NE，N $ _2 $，CO，CO，CO，CO，AR，AR，O $ _2 $，CH $ _4 $ _4 $和KR和KR。其中，已检测到或推断出在Trans-Neptunian对象（TNOS）的表面上检测或推断出N $ _2 $，CO和CH $ _4 $。这些挥发性冰的上方脆弱的大气的存在取决于升华压力，这些压力对挥发性冰的组成，温度和混合状态非常敏感。因此，挥发物在TNO上的保留与其形成环境和热历史有关。表面挥发物可以通过季节性变化的大气进行运输，其冷凝可能是其中一些物体的高表面反照率的原因。对大气的最敏感的搜索是通过出色的仿生方法进行的，这对于研究Triton和Pluto的大气至关重要，并且在其他11个尸体的大气中已经将上限放在上限上。 GAIA天文目录的最新发布导致了一个“黄金时代”，以预测TNO掩体以增加观察数据库的能力。
At 30-50 K, the temperatures typical for surfaces in the Kuiper Belt (e.g. Stern & Trafton 2008), only seven species have sublimation pressures higher than 1 nbar (Fray & Schmitt 2009): Ne, N$_2$, CO, Ar, O$_2$, CH$_4$, and Kr. Of these, N$_2$, CO, and CH$_4$ have been detected or inferred on the surfaces of Trans-Neptunian Objects (TNOs). The presence of tenuous atmospheres above these volatile ices depends on the sublimation pressures, which are very sensitive to the composition, temperatures, and mixing states of the volatile ices. Therefore, the retention of volatiles on a TNO is related to its formation environment and thermal history. The surface volatiles may be transported via seasonally varying atmospheres and their condensation might be responsible for the high surface albedos of some of these bodies. The most sensitive searches for tenuous atmospheres are made by the method of stellar occultation, which have been vital for the study of the atmospheres of Triton and Pluto, and has to-date placed upper limits on the atmospheres of 11 other bodies. The recent release of the Gaia astrometric catalog has led to a "golden age" in the ability to predict TNO occultations in order to increase the observational data base.
