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Observations of Whistler Waves in the Magnetic Reconnection Diffusion Region
Wuhan Univ, Sch Elect Informat, Wuhan, Hubei, Peoples R China.
Wuhan Univ, Sch Elect Informat, Wuhan, Hubei, Peoples R China.
Beihang Univ, Sch Astronaut, Space Sci Inst, Beijing, Peoples R China.
Uppsala universitet, Institutet för rymdfysik, Uppsalaavdelningen.ORCID iD: 0000-0003-1654-841x
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2018 (English)In: 2ND URSI ATLANTIC RADIO SCIENCE MEETING (AT-RASC), IEEE , 2018Conference paper, Published paper (Refereed)
Abstract [en]

Whistler waves are believed to play an important role during magnetic reconnection. In this paper, we report the simultaneous occurrence of two types of the whistler waves in the magnetotail reconnection diffusion region. The first type is observed in the pileup region of downstream and propagates away along the field lines to downstream, and is possibly generated by the electron temperature anisotropy at the magnetic equator. The second type is found around the separatrix region and propagates towards the X-line, and is possibly aenerated by the electron beam-driven whistler instability or Cerenkov emission from electron phase-space holes. Our observations of two different types of whistler waves are well consistent with recent kinetic simulations, and suggest that the observed whistler waves are the consequences of magnetic reconnection.Moreover, we statistically investigate the whistler waves in the magnetotail reconnection region, and construct the global distribution and occurrence rate of the whistler waves based on the two-dimensional reconnection model. It is found that the occurrence rate of the whistler waves is large in the separatrix region (113,1B0j>0.4) and pileup region ([B,./Bol<0.2, 161>45'), but very small in the X-line region. The statistical results are well consistent with the case study.

Place, publisher, year, edition, pages
IEEE , 2018.
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:kth:diva-253491DOI: 10.23919/URSI-AT-RASC.2018.8471382ISI: 000462069500089ISBN: 978-90-82598-73-5 (electronic)OAI: oai:DiVA.org:kth-253491DiVA, id: diva2:1325432
Conference
2nd URSI Atlantic Radio Science Meeting (AT-RASC), MAY 28-JUN 01, 2018, Meloneras, SPAIN
Note

QC 20190826

Available from: 2019-06-15 Created: 2019-06-15 Last updated: 2020-01-30Bibliographically approved

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Vaivads, AndrisKhotyaintsev, Yuri V.Graham, Daniel B.

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