Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL080189 |
Ion Kinetics in a Hot Flow Anomaly: MMS Observations | |
Schwartz, Steven J.1,2; Avanov, Levon3; Turner, Drew4; Zhang, Hui5; Gingell, Imogen1; Eastwood, Jonathan P.1; Gershman, Daniel J.3; Johlander, Andreas6; Russell, Christopher T.7; Burch, James L.8; Dorelli, John C.3; Eriksson, Stefan2; Ergun, Robert E.2; Fuselier, Stephen A.8,9; Giles, Barbara L.3; Goodrich, Katherine A.2; Khotyaintsev, Yuri V.6; Lavraud, Benoit1,10; Lindqvist, Per-Arne6; Oka, Mitsuo1,11; Tai-Duc Phan1,11; Strangeway, Robert J.7; Trattner, Karlheinz J.2; Torbert, Roy B.1,2,12; Vaivads, Andris6; Wei, Hanying7; Wilder, Frederick2 | |
2018-11-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
![]() |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:21页码:11520-11529 |
文章类型 | Article |
语种 | 英语 |
国家 | England; USA; Sweden; France |
英文摘要 | Hot Flow Anomalies (HFAs) are transients observed at planetary bow shocks, formed by the shock interaction with a convected interplanetary current sheet. The primary interpretation relies on reflected ions channeled upstream along the current sheet. The short duration of HFAs has made direct observations of this process difficult. We employ high resolution measurements by NASA's Magnetospheric Multiscale Mission to probe the ion microphysics within a HFA. Magnetospheric Multiscale Mission data reveal a smoothly varying internal density and pressure, which increase toward the trailing edge of the HFA, sweeping up particles trapped within the current sheet. We find remnants of reflected or other backstreaming ions traveling along the current sheet, but most of these are not fast enough to out-run the incident current sheet convection. Despite the high level of internal turbulence, incident and backstreaming ions appear to couple gyro-kinetically in a coherent manner. Plain Language Summary Shock waves in space are responsible for energizing particles and diverting supersonic flows around planets and other obstacles. Explosive events known as Hot Flow Anomalies (HFAs) arise when a rapid change in the interplanetary magnetic field arrives at the bow shock formed by, for example, the supersonic solar wind plasma flow from the Sun impinging on the Earth's magnetic environment. HFAs are known to produce impacts all the way to ground level, but the physics responsible for their formation occur too rapidly to be resolved by previous satellite missions. This paper employs NASA's fleet of four Magnetospheric Multiscale satellites to reveal for the first time clear, discreet populations of ions that interact coherently to produce the extreme heating and deflection. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000451832600002 |
WOS关键词 | DIAMAGNETIC CAVITIES UPSTREAM ; ACTIVE CURRENT SHEETS ; 3-DIMENSIONAL PLASMA ; BOW ; DISCONTINUITY ; EVOLUTION ; ORIGIN |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/27041 |
专题 | 气候变化 |
作者单位 | 1.Imperial Coll London, London, England; 2.Univ Colorado Boulder, Lab Atmospher & Space Phys, Boulder, CO 80309 USA; 3.NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA; 4.Aerosp Corp, POB 92957, Los Angeles, CA 90009 USA; 5.Univ Alaska Fairbanks, Geophys Inst, Fairbanks, AK 99775 USA; 6.Swedish Inst Space Phys Uppsala, Uppsala, Sweden; 7.Univ Calif Los Angeles, Earth Planetary & Space Sci, Los Angeles, CA USA; 8.Southwest Res Inst, San Antonio, TX USA; 9.Univ Texas San Antonio, Dept Phys & Astron, San Antonio, TX USA; 10.Univ Toulouse, UPS, CNRS, Inst Rech Astrophys & Planetol,CNES, Toulouse, France; 11.Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA; 12.Univ New Hampshire, Dept Phys, Durham, NH 03824 USA |
推荐引用方式 GB/T 7714 | Schwartz, Steven J.,Avanov, Levon,Turner, Drew,et al. Ion Kinetics in a Hot Flow Anomaly: MMS Observations[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(21):11520-11529. |
APA | Schwartz, Steven J..,Avanov, Levon.,Turner, Drew.,Zhang, Hui.,Gingell, Imogen.,...&Wilder, Frederick.(2018).Ion Kinetics in a Hot Flow Anomaly: MMS Observations.GEOPHYSICAL RESEARCH LETTERS,45(21),11520-11529. |
MLA | Schwartz, Steven J.,et al."Ion Kinetics in a Hot Flow Anomaly: MMS Observations".GEOPHYSICAL RESEARCH LETTERS 45.21(2018):11520-11529. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论