期刊
ASTROPHYSICAL JOURNAL
卷 819, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.3847/0004-637X/819/1/6
关键词
instabilities; plasmas; solar wind; waves
资金
- NASA Postdoctoral Program at the Goddard Space Flight Center
- Conicyt-Becas Chile Postdoctoral Fellowship
- Heliophysics Guest Investigator grant
- NASA [NNX13AI65G]
- STFC [ST/K000977/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/K000977/1] Funding Source: researchfish
- NASA [473262, NNX13AI65G] Funding Source: Federal RePORTER
We use audification of 0.092 s cadence magnetometer data from the Wind spacecraft to identify waves with amplitudes >0.1 nT near. the ion gyrofrequency (similar to 0.1 Hz) with duration longer than 1 hr during 2008. We present one of the most common types of event for a case study and find it to be a proton-cyclotron wave storm, coinciding with highly radial magnetic field and a suprathermal proton beam close in density to the core distribution itself. Using linear Vlasov analysis, we conclude that the long-duration, large-amplitude waves are generated by the instability of the proton distribution function. The origin of the beam is unknown, but the radial field period is found in the trailing edge of a fast solar wind stream and resembles other events thought to be caused by magnetic field footpoint motion or interchange reconnection between coronal holes and closed field lines in the corona.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据