SwePub
Sök i LIBRIS databas

  Extended search

onr:"swepub:oai:DiVA.org:ltu-68781"
 

Search: onr:"swepub:oai:DiVA.org:ltu-68781" > Solar wind dynamics...

  • 1 of 1
  • Previous record
  • Next record
  •    To hitlist

Solar wind dynamics around a comet : A 2D semi-analytical kinetic model

Behar, Etienne (author)
Luleå tekniska universitet,Rymdteknik,Swedish Institute of Space Physics, Kiruna
Tabone, B. (author)
LERMA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Université, UPMC Univ. Paris
Saillenfest, M. (author)
IMCCE, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Université, UPMC Univ. Paris
show more...
Henri, P. (author)
LPC2E, CNRS, Orléans
Deca, J. (author)
Laboratory for Atmospheric and Space Physics (LASP), University of Colorado Boulder
Lindkvist, Jesper, Doctor, 1986- (author)
Umeå universitet,Institutionen för fysik,Umeå University, Department of Physics
Holmström, Mats (author)
Swedish Institute of Space Physics, Kiruna
Nilsson, Hans (author)
Luleå tekniska universitet,Rymdteknik,Swedish Institute of Space Physics, Kiruna
show less...
 (creator_code:org_t)
2018-11-27
2018
English.
In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 620
Related links:
https://www.aanda.or...
show more...
https://doi.org/10.1...
https://umu.diva-por... (primary) (Raw object)
https://urn.kb.se/re...
https://doi.org/10.1...
https://urn.kb.se/re...
show less...
  • Journal article (peer-reviewed)
Abstract Subject headings
Close  
  • Aims.We aim at analytically modelling the solar wind proton trajectories during their interaction with a partially ionised cometaryatmosphere, not in terms of bulk properties of the flow but in terms of single particle dynamics.Methods.We first derive a generalised gyromotion, in which the electric field is reduced to its motional component. Steady-stateis assumed, and simplified models of the cometary density and of the electron fluid are used to express the force experienced byindividual solar wind protons during the interaction.Results.A three-dimensional (3D) analytical expression of the gyration of two interacting plasma beams is obtained. Applying it to acomet case, the force on protons is always perpendicular to their velocity and has an amplitude proportional to 1/r2. The solar winddeflection is obtained at any point in space. The resulting picture presents a caustic of intersecting trajectories, and a circular regionis found that is completely free of particles. The particles do not lose any kinetic energy and this absence of deceleration, togetherwith the solar wind deflection pattern and the presence of a solar wind ion cavity, is in good agreement with the general results of theRosettamission.Conclusions.The qualitative match between the model and thein situdata highlights how dominant the motional electric field isthroughout most of the interaction region for the solar wind proton dynamics. The model provides a simple general kinetic descriptionof how momentum is transferred between these two collisionless plasmas. It also shows the potential of this semi-analytical modelfor a systematic quantitative comparison to the data.

Subject headings

NATURVETENSKAP  -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Rymd- och flygteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Aerospace Engineering (hsv//eng)
NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)

Keyword

Atmosfärsvetenskap
Atmospheric science
comets: general

Publication and Content Type

ref (subject category)
art (subject category)

Find in a library

To the university's database

  • 1 of 1
  • Previous record
  • Next record
  •    To hitlist

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Close

Copy and save the link in order to return to this view