Abstract
Blanco-Cano et al. (2018) intended to find a type of transient event in the solar wind before the terrestrial bow shock using a special type of simulation. However, the simulation results cannot reproduce the main features of the event. Based on the remarks described below, I am sure that the features in the simulations are not those type of events. The VLASIATOR code simulated proto-SHFAs.
Highlights
The spontaneous hot flow anomalies (SHFAs) are surrounded by density and magnetic field increases at the edge of the phenomena
The simulation results cannot reproduce the main features of the SHFAs
The SHFAs show density and magnetic field magnitude drops in their cavity
Summary
The SHFAs are surrounded by density and magnetic field increases at the edge of the phenomena. Blanco-Cano et al (2018) analysed the output of the Vlasiator global hybrid-Vlasov solver and intended to find spontaneous hot flow anomalies (SHFAs; Zhang et al, 2013; Omidi et al, 2013). This is a very nice paper about the development of the foreshock cavitons and magnetosheath cavities based on unique global hybrid-Vlasov simulations. The simulation results cannot reproduce the main features of the SHFAs. The SHFAs (and the HFAs) show density and magnetic field magnitude drops in their cavity.
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