Oblique lower band chorus waves: Time shifts between discrete elements observed by the Cluster spacecraft

Result code in IS VaVaI

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Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Oblique lower band chorus waves: Time shifts between discrete elements observed by the Cluster spacecraft

Original language description

We report observations of remarkable frequency differences and time shifts between the corresponding elements of lower band chorus recorded by the four Cluster spacecraft at low magnetic latitudes. Surprisingly, the spacecraft located closer to the equator systematically received the corresponding chorus elements later than the spacecraft located at higher magnetic latitudes. The time shifts and frequency differences depended almost linearly on the perpendicular distance between the various spacecraft.Analysis of data shows that chorus emissions were generated with highly oblique angles of propagation. We show that the sources moving across the magnetic field lines are reasonably consistent with these observations. We propose that the transverse motion of the chorus sources is a consequence of a feedback between the oblique waves and counter streaming electrons during nonlinear cyclotron interactions, and we provide an estimate of the transverse velocity of the source.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BL - Plasma physics and discharge through gases

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2009

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Geophysical Research

ISSN

0148-0227

e-ISSN

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Volume of the periodical

114

Issue of the periodical within the volume

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Country of publishing house

US - UNITED STATES

Number of pages

13

Pages from-to

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UT code for WoS article

000272946500001

EID of the result in the Scopus database

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