气候变化领域集成服务门户(CCPortal): Magnetopause Compressibility at Saturn with Internal Drivers

CCPortal

DOI	10.1029/2019GL086438
	Magnetopause Compressibility at Saturn with Internal Drivers
	Hardy F.; Achilleos N.; Guio P.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:10
英文摘要	We use magnetopause crossings of the Cassini spacecraft to study the response of Saturn's magnetosphere to changes in external and internal drivers. We explain how solar wind pressure can be corrected to account for the local variability in internal plasma particle pressure. The physics-based method is applied to perform the most robust estimation of magnetopause compressibility at Saturn to date, using 7 years' worth of magnetometer data from the Cassini mission and accounting for variable internal drivers—particle pressure and azimuthal ring current. The concept of magnetopause compressibility is generalized to quantitatively account for its detailed variation with respect to the position of the magnetopause. An analytical fit is provided to map the compressibility index to values of the stand-off distance. In particular, the procedure shows that the Kronian system appears to behave similarly to that of Jupiter when expanded outwards and more like the Earth's magnetopause when compressed. ©2020. The Authors.
英文关键词	Compressibility; Interplanetary flight; Planets; Structural dynamics; Wind effects; Cassini spacecraft; Compressibility index; Magnetopause crossings; Particle pressure; Physics-based methods; Robust estimation; Solar wind pressure; Stand-off distance (SoD); Magnetopause; compressibility; Jupiter; magnetometer; magnetopause; magnetosphere; partial pressure; plasma; Saturn; solar wind; spacecraft
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170334
作者单位	Department of Physics and Astronomy, University College London, London, United Kingdom; Centre for Planetary Sciences at UCL/Birkbeck, London, United Kingdom
推荐引用方式 GB/T 7714	Hardy F.,Achilleos N.,Guio P.. Magnetopause Compressibility at Saturn with Internal Drivers[J],2020,47(10).
APA	Hardy F.,Achilleos N.,&Guio P..(2020).Magnetopause Compressibility at Saturn with Internal Drivers.Geophysical Research Letters,47(10).
MLA	Hardy F.,et al."Magnetopause Compressibility at Saturn with Internal Drivers".Geophysical Research Letters 47.10(2020).