Seasonal change of CH4/H-2 ratio in the atmosphere of Uranus

doi:10.1007/s10509-019-3568-2

	Seasonal change of CH4/H-2 ratio in the atmosphere of Uranus
	Wang, Cong; Tu, Cui; Hu, Xiong
刊名	ASTROPHYSICS AND SPACE SCIENCE
	2019
卷号	364 期号:5 页码:77
关键词	Planets and satellites: atmospheres Planets and satellites: composition Planets and satellites: gaseous planets Telescopes: Instrumentation: spectrographs Planets and satellites: individual: Uranus
ISSN号	0004-640X
DOI	10.1007/s10509-019-3568-2
英文摘要	Uranus is mainly composed of elements heavier than hydrogen and helium, such as C, S, even though very little information about these elements has been detected. Methane is one of the most important component of the atmosphere of Uranus. Analysis of the full-disk spectra of Uranus, as observed by the Xinglong 2.16m telescope with BFOSC (Beijing-Faint Object Spectrograph and Camera) on August 26 2016, was performed. A simple empirical model was used to fit the several years of spectrum albedo data to determine the variations of the CH4/H-2 ratio in the atmosphere of Uranus. These data include: spectra observed by the 1.52m telescope (1994 and 1995) on La Silla, Chile; spectra observed by the HST-STIS (2002 and 2003); and spectra observed by the Xinglong 2.16m telescope (2016). The interannual change of the CH4/H-2 ratio can be derived by comparing the fit results of various spectral albedos. The comparative results indicate that the CH4/H-2 ratio in the atmosphere of Uranus declined from 1994 until 2002, and then began to rise thereafter. From the results, we speculate that the variation period of CH4/H-2 ratio in the atmosphere of Uranus is longer than twenty years. We were unable to confirm whether the period is 84 or 42 years.
语种	英语
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/7020]
专题	国家空间科学中心_空间环境部
推荐引用方式 GB/T 7714	Wang, Cong,Tu, Cui,Hu, Xiong. Seasonal change of CH4/H-2 ratio in the atmosphere of Uranus[J]. ASTROPHYSICS AND SPACE SCIENCE,2019,364(5):77.
APA	Wang, Cong,Tu, Cui,&Hu, Xiong.(2019).Seasonal change of CH4/H-2 ratio in the atmosphere of Uranus.ASTROPHYSICS AND SPACE SCIENCE,364(5),77.
MLA	Wang, Cong,et al."Seasonal change of CH4/H-2 ratio in the atmosphere of Uranus".ASTROPHYSICS AND SPACE SCIENCE 364.5(2019):77.