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DC Field | Value | Language |
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dc.contributor.author | Falkowski, Barbara J. | |
dc.contributor.author | Tsurutani, Bruce T. | |
dc.contributor.author | Lakhina, G.S. | |
dc.contributor.author | Pickett, Jolene S. | |
dc.date.accessioned | 2017-11-10T06:02:59Z | |
dc.date.accessioned | 2021-02-12T09:49:29Z | - |
dc.date.available | 2017-11-10T06:02:59Z | |
dc.date.available | 2021-02-12T09:49:29Z | - |
dc.date.issued | 2017 | |
dc.identifier.citation | JGR, 122, 1643–1657, doi: 10.1002/2016JA023289 | en_US |
dc.identifier.uri | http://localhost:8080/xmlui/handle/123456789/1114 | - |
dc.description.abstract | A study of dayside plasmaspheric hiss at frequencies from ~22 Hz to ~1.0 kHz was carried out by using 1 year of Polar data. It is shown that intense, dayside plasmaspheric hiss is correlated with solar wind pressure with P>2.5 nPa. The dayside effect is most prominent in the ~300 to ~650 Hz range. Intense dayside waves are also present during SYM-H< 5 nT. The latter is centered at local noon, with the greatest intensities in the L = 2 to 3 region. Assuming drift of ~25 keV electrons from midnight to the wave magnetic local time, plasmaspheric hiss is shown to be highly correlated with precursor AE* and SYM-H* indices, indicating that the hiss is associated with substorms and small injection events. Our hypothesis is that both sets of waves originate as outer zone (L = 6 to 10) chorus and then propagate into the plasmasphere. Fourteen high-intensity dayside plasmaspheric hiss events were analyzed to identify the wave k, polarization, and the degree of coherency. The waves are found to be obliquely propagating, elliptically polarized and quasi-coherent (~0.5 to 0.8 correlation coefficient). It is hypothesized that the dayside plasmaspheric hiss is quasi-coherent because the chorus has been recently generated in the outer magnetosphere and have propagated directly into the plasmasphere. It is possible that the quasi-coherency of the dayside hiss at L = 2 to 3 may be an alternate explanation for the generation of the energetic particle slot region. | en_US |
dc.language.iso | en | en_US |
dc.subject | Dayside plasmaspheric hiss | en_US |
dc.subject | Plasmaspheric hiss | en_US |
dc.subject | Solar wind pressure | en_US |
dc.subject | Solar wind | en_US |
dc.subject | Geomagnetic activity | en_US |
dc.title | Two sources of dayside intense, quasi-coherent plasmaspheric hiss: A new mechanism for the slot region? | en_US |
dc.type | Article | en_US |
dc.identifier.accession | 091658 | |
Appears in Collections: | UAS_Reprints |
Files in This Item:
File | Description | Size | Format | |
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LakhinaGS_etal_JGR_2017.pdf | 657.7 kB | Adobe PDF | View/Open |
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