Measurement and implications of Saturn's gravity field and ring mass

doi:10.1126/science.aat2965

GSTDTAP > 地球科学

DOI	10.1126/science.aat2965
	Measurement and implications of Saturn's gravity field and ring mass
	Iess, L.1; Militzer, B.2,3; Kaspi, Y.4; Nicholson, P.5; Durante, D.1; Racioppa, P.1; Anabtawi, A.6; Galanti, E.4; Hubbard, W.7; Mariani, M. J.1; Tortora, P.8; Wahl, S.3; Zannoni, M.8
	2019-06-14
发表期刊	SCIENCE
ISSN	0036-8075
EISSN	1095-9203
出版年	2019
卷号	364 期号:6445 页码:1052-+
文章类型	Article
语种	英语
国家	Italy; USA; Israel
英文摘要	The interior structure of Saturn, the depth of its winds, and the mass and age of its rings constrain its formation and evolution. In the final phase of the Cassini mission, the spacecraft dived between the planet and its innermost ring, at altitudes of 2600 to 3900 kilometers above the cloud tops. During six of these crossings, a radio link with Earth was monitored to determine the gravitational field of the planet and the mass of its rings. We find that Saturn's gravity deviates from theoretical expectations and requires differential rotation of the atmosphere extending to a depth of at least 9000 kilometers. The total mass of the rings is (1.54 +/- 0.49) x 10(19) kilograms (0.41 +/- 0.13 times that of the moon Mimas), indicating that the rings may have formed 10(7) to 10(8) years ago.
领域	地球科学 ; 气候变化 ; 资源环境
收录类别	SCI-E
WOS记录号	WOS:000471306700034
WOS关键词	JUPITERS DEEP ; ZONAL WINDS ; DIFFERENTIAL ROTATION ; GRAVITATIONAL-FIELD ; DENSITY WAVES ; LONG-TERM ; B-RINGS ; EVOLUTION ; INTERIOR ; CONSTRAINTS
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/201662
专题	地球科学资源环境科学气候变化
作者单位	1.Sapienza Univ Roma, Dept Mech & Aerosp Engn, I-00184 Rome, Italy; 2.Univ Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 USA; 3.Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA; 4.Weizmann Inst Sci, Dept Earth & Planetary Sci, IL-76100 Rehovot, Israel; 5.Cornell Univ, Dept Astron, Ithaca, NY 14853 USA; 6.CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA; 7.Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA; 8.Univ Bologna, Dept Ind Engn, I-47100 Forli, Italy
推荐引用方式 GB/T 7714	Iess, L.,Militzer, B.,Kaspi, Y.,et al. Measurement and implications of Saturn's gravity field and ring mass[J]. SCIENCE,2019,364(6445):1052-+.
APA	Iess, L..,Militzer, B..,Kaspi, Y..,Nicholson, P..,Durante, D..,...&Zannoni, M..(2019).Measurement and implications of Saturn's gravity field and ring mass.SCIENCE,364(6445),1052-+.
MLA	Iess, L.,et al."Measurement and implications of Saturn's gravity field and ring mass".SCIENCE 364.6445(2019):1052-+.