| Full text | |
| Author(s): |
Ezequiel Echer
[1]
Total Authors: 1
|
| Affiliation: | [1] Instituto Nacional de Pesquisas Espaciais - Brasil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | Revista Brasileira de Geofísica; v. 28, n. 2, p. 175-182, 2010-06-00. |
| Abstract | |
Ultra-low-frequency (ULF) waves have been observed in the Mercury's magnetosphere. In this work, Mariner-10 and MESSENGER high resolution magnetic field data are studied with wavelet analysis. Two ULF wave intervals have been selected: 29 March 1974 (Mariner-10) and 14 January 2008 (MESSENGER). Non-stationary oscillations, with strong amplitude and narrow bandwidth have been found. The Mariner-10 ULF wave interval showed periods of ∼1.5-3.0 s, and the MESSENGER ULF wave interval had periods of ∼0.5-1.0 s. These periods of ULF waves are slightly longer than the proton gyroperiods (∼0.8 and ∼0.5 s, respectively). Therefore, these waves are most likely kinetic, not magnetohydrodynamic waves. (AU) | |