17 citations · 33 across the 15 of their papers we have counts for
8 papers · 1 filter
Exact solutions for standing kink modes of the longitudinally stratified coronal loops
N. Dadashi, H. Safari, S. Nasiri +1
The influence of longitudinal structuring on the fast kink modes of coronal loops is investigated. Analytical dispersion relations and mode profiles are derived for the second-orde…
An Inverse Gravitation for Cosmic Speed up, and Dark Energy Equivalent
Sohrab Rahvar, Yousef Sobouti
To explain the cosmic speed up, brought to light by the recent SNIa and CMB observations, we propose the following: a) In a spacetime endowed with a FRW metric, we choose an empiri…
Oscillations of longitudinally density stratified coronal loops
H. Safari, S. Nasiri, Y. Sobouti
We investigate the standing kink modes of a cylindrical model of coronal loops. The density is stratified along the loop axis and changes discontinuously at the surface of the cyli…
Resonant absorption in dissipative flux tubes
H. Safari, S. Nasiri, K. Karami +1
We study the resonant absorption of MHD waves in magnetized flux tubes with a radial density inhomogeneity. Within the approximation that resistive and viscous processes are operat…
Revised dynamics or dark matter in galactic and extra galactic scales?
Yousef Sobouti
Allowing the energy of a gravitational field to serve partially as its own source allows gravitating bodies to exhibit stronger fields, as if they were more massive. Depending on d…
Angular momentum transfer to a star by gravitational waves
H. G. Khosroshahi, Y. Sobouti
Interaction of a stochastic background of gravitational radiation with celestial systems changes their dynamical elements in a random manner and give rise to secular changes in tim…
Integrals and static solutions of general relativistic Liouville's equation in post Newtonian approximation
V. Rezania, Y. Sobouti
The post-Newtonian approximation of general relativistic Liouville's equation is presented. Two integrals of it, generalizations of the classical energy and angular momentum, are o…
Normal modes of relativistic systems in post Newtonian approximation
Y. Sobouti, V. Rezania
We use the post Newtonian (pn) order of Liouville's equation (pnl) to study the normal modes of oscillation of a relativistic system. In addition to classical modes, we are able to…