Premium
Spontaneous hot flow anomalies at Mars and Venus
Author(s) -
Collinson Glyn,
Sibeck David,
Omidi Nick,
Grebowsky Joseph,
Halekas Jasper,
Mitchell David,
Espley Jared,
Zhang Tielong,
Persson Moa,
Futaana Yoshifumi,
Jakosky Bruce
Publication year - 2017
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
eISSN - 2169-9402
pISSN - 2169-9380
DOI - 10.1002/2017ja024196
Subject(s) - venus , mars exploration program , astrobiology , planet , foreshock , geology , geophysics , interplanetary magnetic field , interplanetary spaceflight , bow shock (aerodynamics) , solar wind , physics , shock wave , astronomy , plasma , mechanics , seismology , aftershock , quantum mechanics
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.