Journal article
Spontaneous hot flow anomalies at Mars and Venus
Journal of geophysical research. Space physics, Vol.122(10), pp.9910-9923
10/2017
DOI: 10.1002/2017JA024196
Abstract
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.
Key Points
We report the first extraterrestrial observations of Spontaneous Hot Flow Anomalies (SHFAs) in the foreshocks of Venus and Mars
Although occurring at different planets, the events were very similar in duration and character
SHFAs have the capability to directly impart energy into the ionospheres of unmagnetized planets
Details
- Title: Subtitle
- Spontaneous hot flow anomalies at Mars and Venus
- Creators
- Glyn Collinson - Goddard Space Flight CenterDavid Sibeck - Goddard Space Flight CenterNick Omidi - Solana Scientific Solana Beach California USAJoseph Grebowsky - Goddard Space Flight CenterJasper Halekas - University of IowaDavid Mitchell - University of California, BerkeleyJared Espley - Goddard Space Flight CenterTielong Zhang - Austrian Academy of SciencesMoa Persson - Swedish Institute of Space PhysicsYoshifumi Futaana - Swedish Institute of Space PhysicsBruce Jakosky - Laboratory for Atmospheric and Space Physics
- Resource Type
- Journal article
- Publication Details
- Journal of geophysical research. Space physics, Vol.122(10), pp.9910-9923
- DOI
- 10.1002/2017JA024196
- ISSN
- 2169-9380
- eISSN
- 2169-9402
- Number of pages
- 14
- Grant note
- NASA Solar System Workings Program (NNX15A176G; NASW-00003)
- Language
- English
- Date published
- 10/2017
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199738602771
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