WHAT DO WE REALLY KNOW ABOUT URANUS AND NEPTUNE?
WHAT DO WE REALLY KNOW ABOUT URANUS AND NEPTUNE?
复制标题
我们对天王星和海王星真正了解多少？
DOI：
10.1088/2041-8205/759/2/l32
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
R. Helled
中科院分区：
文献类型：
--
作者：
M. Podolak;R. Helled
天王星和海王星的内部结构和组成由于自转周期和平坦度的不确定性，以及引力系数的误差条较大，没有得到很好的约束。虽然天王星和海王星在质量和半径上相似，但它们在其他物理性质上不同，如热辐射、倾角和推断的大气富集。在这篇文章中，我们考虑了行星旋转周期的不确定性，表明旋转周期与测量的扁率更一致意味着天王星和海王星具有不同的内部结构，并推测了这种差异的来源。我们得出的结论是，天王星和海王星可能有非常不同的结构和/或成分，尽管它们的质量和半径相似。我们指出，理解这些差异可以对我们对天王星和海王星以及一般中等质量系外行星的形成和演化的看法产生重要影响。
The internal structures and compositions of Uranus and Neptune are not well constrained due to the uncertainty in rotation period and flattening, as well as the relatively large error bars on the gravitational coefficients. While Uranus and Neptune are similar in mass and radius, they differ in other physical properties such as thermal emission, obliquity, and inferred atmospheric enrichment. In this Letter, we consider the uncertainty in the planetary rotation periods, show that rotation periods more consistent with the measured oblateness imply that Uranus and Neptune have different internal structures, and speculate on the source of that difference. We conclude that Uranus and Neptune might have very different structures and/or compositions despite their similar masses and radii. We point out that understanding these differences can have important implications for our view of the formation and evolution of Uranus and Neptune as well as intermediate-mass extrasolar planets in general.
影响因子：
4.9
作者：
Nettelmann, N.;Becker, A.;Redmer, R.
通讯作者：
Redmer, R.