investigating the anatomy of magnetosheath jets – mms observations
Clicks: 55
ID: 218384
2018
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This
article has not been analysed, so there is no overall score —
reader engagement is measured and shown alongside.
Reader Engagement
Emerging Content
16.2
/100
55 views
6 readers
AI Quality Assessment
Not analyzed
Readership in this journal
EmergingRanked #401 of 484 articles by views in journal of food measurement and characterization
Most read
Least read
Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 484 in total.
Mint this article as an NFT
Not yet mintedCreate a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.
5
SUSD
one-off · no wallet required
Abstract
We use Magnetosphere Multiscale (MMS) mission data to investigate a small
number of magnetosheath jets, which are localized and transient increases in
dynamic pressure, typically due to a combined increase in plasma velocity and
density. For two approximately hour-long intervals in November, 2015 we found
six jets, which are of two distinct types. (a) Two of the jets are associated
with the magnetic field discontinuities at the boundary between the
quasi-parallel and quasi-perpendicular magnetosheath. Straddling the
boundary, the leading part of these jets contains an ion population similar
to the quasi-parallel magnetosheath, while the trailing part contains ion
populations similar to the quasi-perpendicular magnetosheath. Both
populations are, however, cooler than the surrounding ion populations. These
two jets also have clear increases in plasma density and magnetic field
strength, correlated with a velocity increase. (b) Three of the jets are
found embedded within the quasi-parallel magnetosheath. They contain ion
populations similar to the surrounding quasi-parallel magnetosheath, but with
a lower temperature. Out of these three jets, two have a simple structure. For these two jets, the increases in density and magnetic field strength are correlated with the dynamic pressure increases. The other jet has a more complicated structure, and no clear correlations between density, magnetic field strength and dynamic pressure. This jet has likely interacted with the
magnetosphere, and contains ions similar to the jets inside the
quasi-parallel magnetosheath, but shows signs of adiabatic heating. All jets
are associated with emissions of whistler, lower hybrid, and broadband
electrostatic waves, as well as approximately 10 s period electromagnetic
waves with a compressional component. The latter have a Poynting flux of up
to 40 µW m−2 and may be energetically important for the
evolution of the jets, depending on the wave excitation mechanism. Only one
of the jets is likely to have modified the surrounding magnetic field into a
stretched configuration, as has recently been reported in other studies. None
of the jets are associated with clear signatures of either magnetic or
thermal pressure gradient forces acting on them. The different properties of
the two types also point to different generation mechanisms, which are
discussed here. Their different properties and origins suggest that the two
types of jets need to be separated in future statistical and simulation
studies.
| Reference Key |
karlsson2018annalesinvestigating
Use this key to autocite in the manuscript while using
SciMatic Manuscript Manager or Thesis Manager
|
|---|---|
| Authors | ;T. Karlsson;F. Plaschke;H. Hietala;M. Archer;X. Blanco-Cano;P. Kajdič;P.-A. Lindqvist;G. Marklund;D. J. Gershman |
| Journal | journal of food measurement and characterization |
| Year | 2018 |
| DOI |
10.5194/angeo-36-655-2018
|
| URL | |
| Keywords |
Citations
No citations found. To add a citation, contact the admin at info@scimatic.org
Comments
No comments yet. Be the first to comment on this article.