VOYAGER 2 OBSERVES A LARGE DENSITY INCREASE IN THE HELIOSHEATH

	VOYAGER 2 OBSERVES A LARGE DENSITY INCREASE IN THE HELIOSHEATH
	Richardson, J. D.; Wang, C.
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2012
卷号	759 期号:1 页码:L19
关键词	solar wind Sun: heliosphere
ISSN号	2041-8205
通讯作者	Richardson, JD (reprint author), MIT, Kavli Ctr Astrophys & Space Res, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
中文摘要	Voyager 2 (V2) entered the heliosheath in 2007 August at roughly the same time solar minimum conditions were reaching the outer heliosphere. Soon after crossing the termination shock the solar wind density at Voyager decreased by a factor of two and the temperature decreased by a factor of three. At the beginning of 2011 the plasma density in the heliosheath began to increase and in mid-2012 it was up by more than a factor of two. The temperature rose by about 50% and the speed remained constant, although the flow direction continues to turn tailward. These changes may signal the end of solar minimum conditions at V2 in the heliosheath, although we do not understand why the speed did not decrease. The increased dynamic pressure has lead to an outward movement of the termination shock from its very compressed state at solar minimum.
英文摘要	Voyager 2 (V2) entered the heliosheath in 2007 August at roughly the same time solar minimum conditions were reaching the outer heliosphere. Soon after crossing the termination shock the solar wind density at Voyager decreased by a factor of two and the temperature decreased by a factor of three. At the beginning of 2011 the plasma density in the heliosheath began to increase and in mid-2012 it was up by more than a factor of two. The temperature rose by about 50% and the speed remained constant, although the flow direction continues to turn tailward. These changes may signal the end of solar minimum conditions at V2 in the heliosheath, although we do not understand why the speed did not decrease. The increased dynamic pressure has lead to an outward movement of the termination shock from its very compressed state at solar minimum.
学科主题	空间物理
收录类别	SCI
资助信息	NASA from the Jet Propulsion Laboratory [959203]; NASA; 973 program [2012CB825602]; NNSFC [41231067]; [NNX08AE49G]
语种	英语
公开日期	2014-12-15
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/3182]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	Richardson, J. D.,Wang, C.. VOYAGER 2 OBSERVES A LARGE DENSITY INCREASE IN THE HELIOSHEATH[J]. ASTROPHYSICAL JOURNAL LETTERS,2012,759(1):L19.
APA	Richardson, J. D.,&Wang, C..(2012).VOYAGER 2 OBSERVES A LARGE DENSITY INCREASE IN THE HELIOSHEATH.ASTROPHYSICAL JOURNAL LETTERS,759(1),L19.
MLA	Richardson, J. D.,et al."VOYAGER 2 OBSERVES A LARGE DENSITY INCREASE IN THE HELIOSHEATH".ASTROPHYSICAL JOURNAL LETTERS 759.1(2012):L19.