Abstract
Properties of propagation of large amplitude dust ion-acoustic solitary waves and double layers are investigated in electron-positron-ion plasma with highly charged negative dust. Sagdeev pseudopotential method has been used to derive the energy balance equation. The expression for the critical Mach number (lower/upper limit) for the existence of solitary structures has also been derived. The Sagdeev pseudopotential is a function of numbers of physical parameters such as ion temperature (σ), positron density (δp), dust density (δd) and electron to positron temperature ratio (β). These parameters significantly influence the properties of the solitary structures and double layers. Further it is found that both polarity (compressive and rarefactive) solitons and negative potential double layers are observed.
| Original language | English |
|---|---|
| Pages (from-to) | 129-138 |
| Number of pages | 10 |
| Journal | Astrophysics and Space Science |
| Volume | 347 |
| Issue number | 1 |
| DOIs | |
| State | Published - Sep 2013 |
| Externally published | Yes |
Funding
Acknowledgements Initial part of this work was done during International Advanced Workshop on the Frontiers of Plasma Physics (July 05–16, 2010), ICTP, Italy. This manuscript is dedicated to our esteemed Teacher and Colleague Prof. Padma Kant Shukla who devoted his entire research career for promotion of Plasma Science and to help researchers of plasma community from developing countries. This work was supported by University Grants Commission, New Delhi, India under the major research project F. No. 41-873/2012 (SR).
| Funders | Funder number |
|---|---|
| University Grants Commission | 41-873/2012 |
Keywords
- Double layers
- Dust concentration
- Dust ion-acoustic wave
- Positrons
- Solitons