Magnetic Fluctuations and Turbulence in the Venusian Magnetosheath Downstream of Different Types of Bow Shock

• Published in: Journal of geophysical research. Space physics 2018-10, Vol.123 (10), p.8219-8226
• Main Authors: Xiao, S. D., Zhang, T. L., Vörös, Z.
• Format: Article
• Language: English
• Subjects: Fluctuations; Magnetosheath; Scaling; Turbulence; Venus; Venus Express (ESA)
• ISSN: 2169-9380; 2169-9402
• DOI: 10.1029/2018JA025250

We statistically examine the characteristic scaling features of fluctuations in the dayside Venusian magnetosheath downstream of different types, quasi‐parallel (Q∥) and quasi‐perpendicular (Q⊥), of bow shock based on Venus Express data. We found that magnetic fluctuations have different characteristic scaling features downstream of Q∥ and Q⊥ bow shocks. Although the Venusian dayside magnetosheath is much thinner than the Earth magnetosheath, fully developed turbulence can be still observed downstream of the Q∥ bow shock, while the turbulence is not dominant downstream of Q⊥ bow shock. The type of bow shock plays an important role in the characteristic scaling features of downstream magnetic fluctuations. That means that the Q∥ IMF might be a source of the turbulence in Venusian magnetosheath. Key Points Magnetic fluctuations have different characteristic scaling features downstream of Q∥ and Q⊥ bow shocks Fully developed turbulence can be observed downstream of the Q∥ bow shock, while the turbulence is not dominant downstream of Q⊥ bow shock The Q⊥ IMF might be a source of the turbulence in Venusian magnetosheath