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DOI | 10.1126/science.aat2027 |
The low-frequency source of Saturn's kilometric radiation | |
Lamy, L.1; Zarka, P.1; Cecconi, B.1; Prange, R.1; Kurth, W. S.2; Hospodarsky, G.2; Persoon, A.2; Morooka, M.3; Wahlund, J. -E.3; Hunt, G. J.4 | |
2018-10-05 | |
发表期刊 | SCIENCE |
ISSN | 0036-8075 |
EISSN | 1095-9203 |
出版年 | 2018 |
卷号 | 362期号:6410页码:48-+ |
文章类型 | Article |
语种 | 英语 |
国家 | France; USA; Sweden; England |
英文摘要 | Understanding how auroral radio emissions are produced by magnetized bodies requires in situ measurements within their source region. Saturn's kilometric radiation (SKR) has been widely used as a remote proxy of Saturn's magnetosphere. We present wave and plasma measurements from the Cassini spacecraft during its ring-grazing high-inclination orbits, which passed three times through the high-altitude SKR emission region. Northern dawn-side, narrow-banded radio sources were encountered at frequencies of 10 to 20 kilohertz, within regions of upward currents mapping to the ultraviolet auroral oval. The kilometric waves were produced on the extraordinary mode by the cyclotron maser instability from 6- to 12-kiloelectron volt electron beams and radiated quasi-perpendicularly to the auroral magnetic field lines. The SKR low-frequency sources appear to be strongly controlled by time-variable magnetospheric electron densities. |
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:000446547100034 |
WOS关键词 | ELECTRON-CYCLOTRON MASER ; RADIO-EMISSION ; SOLAR-WIND ; FIELDS |
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/199732 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Paris Diderot, Univ Paris Sci & Lettres, Lab Etud Spatiales & Instrumentat Astrophys, Observ Paris,Sorbonne Univ,Sorbonne Paris Cite,CN, 5 Pl Jules Janssen, F-92195 Meudon, France; 2.Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA; 3.Swedish Inst Space Phys, Box 537, SE-75121 Uppsala, Sweden; 4.Imperial Coll London, Blackett Lab, London SW7 2BW, England |
推荐引用方式 GB/T 7714 | Lamy, L.,Zarka, P.,Cecconi, B.,et al. The low-frequency source of Saturn's kilometric radiation[J]. SCIENCE,2018,362(6410):48-+. |
APA | Lamy, L..,Zarka, P..,Cecconi, B..,Prange, R..,Kurth, W. S..,...&Hunt, G. J..(2018).The low-frequency source of Saturn's kilometric radiation.SCIENCE,362(6410),48-+. |
MLA | Lamy, L.,et al."The low-frequency source of Saturn's kilometric radiation".SCIENCE 362.6410(2018):48-+. |
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