Location and size of the global source region of whistler-mode chorus

0338125 - ÚFA 2011 RIV US eng J - Journal Article
Hayosh, Mykhaylo - Santolík, Ondřej - Parrot, M.
Location and size of the global source region of whistler-mode chorus.
Journal of Geophysical Research. Roč. 115, - (2010), A00F06/1-A00F06/8. ISSN 0148-0227
R&D Projects: GA MŠMT ME09107; GA ČR GA205/09/1253; GA AV ČR IAA301120601
Grant - others:ESA PECS(XE) 98025; CNRS/DREI(FR) PICS 3725
Institutional research plan: CEZ:AV0Z30420517
Keywords : CLUSTER * ray-tracing * chorus
Subject RIV: BL - Plasma and Gas Discharge Physics
Impact factor: 3.303, year: 2010

We use multicomponent measurements of the four Cluster spacecraft and a backward ray tracing simulation to estimate the location and size of the global source of whistler-mode chorus emissions in the magnetic equatorial plane. For the first time, analysis is made in a broad range of latitudes in both hemispheres along a single Cluster orbit. Our results show that for different time intervals, the sizes of the observed portions of the global chorus source region in the equatorial plane varied between 0.4-1.5 Earth radii. They were found at radial distances between 4.5 and 8.2 Earth radii during 2 hours of measurements. Therefore, the superposed minimum width of the global source region of whistler-mode chorus in the magnetic equatorial plane is approximately 4 Earth radii.
Permanent Link: http://hdl.handle.net/11104/0181981