Astrophysics and Space Science

, Volume 341, Issue 2, pp 515–525

Dust-acoustic soliton in a plasma with multi-species ions and kappa-distributed electrons

Original Article

DOI: 10.1007/s10509-012-1073-y

Cite this article as:
Bora, M.P., Choudhury, B. & Das, G.C. Astrophys Space Sci (2012) 341: 515. doi:10.1007/s10509-012-1073-y


In this work, we consider the formation of electrostatic, dust-acoustic solitary structure in a unmagnetized plasma with Lorentzian electrons (kappa-distributed) and more than one species of thermal ions (Maxwellian). The work is inspired by results of different space-based observations of electrostatic solitary waves (ESW) in the near-earth and magnetospheric plasmas and recent experimental realization of existence of superthermal electron component in various space plasmas. We have, in this work, shown that existence of compressive potential structure is possible only with more than one species of thermal ions. Besides, formation of compressive double layers is also possible which depends on the amount of deviation of the electron thermal velocities from a Maxwellian distribution. We show that both dust-temperature and super-thermal electrons lead to a decrease in the soliton amplitude.


Dust-acoustic solitonKappa distribution

Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  1. 1.Physics DepartmentGauhati UniversityGuwahatiIndia
  2. 2.Institute of Advance Studies in Science and TechnologyGuwahatiIndia