Publication Date:
2019-07-13
Description:
We report the first observations of Spontaneous Hot Flow Anomalies (SHFAs) at Venus and Mars, demonstrating their existence in the foreshocks of other planets beyond Earth. Using data from the ESA Venus Express and the NASA Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft, we present magnetic and plasma observations from events at both planets, exhibiting properties similar to classical Hot Flow Anomalies, with bounding shock-like compressive regions and a hot and diffuse core. However, these explosive foreshock transients were observed without any attendant interplanetary magnetic field discontinuity, consistent with SHFAs observed at Earth and our hybrid simulations.
Keywords:
Space Radiation
Type:
GSFC-E-DAA-TN53853
,
Journal of Geophysical Research: Space Physics (ISSN 2169-9402) (e-ISSN ); 122; vember 10; 9910-9923
Format:
text