scholarly journals Propagation of electromagnetic waves in resistive pair plasma and causal relativistic magnetohydrodynamics

2008 ◽  
Vol 78 (12) ◽  
Author(s):  
Shinji Koide
Keyword(s):  
Electromagnetic Waves ◽  
Pair Plasma ◽  
Relativistic Magnetohydrodynamics

scholarly journals The Pulsar Pair Plasma

2000 ◽  
Vol 177 ◽  
pp. 455-456
Author(s):  
Estelle Asseo ◽  
Alain Riazuelo
Keyword(s):  
Wave Propagation ◽  
Distribution Function ◽  
Electromagnetic Waves ◽  
Distribution Functions ◽  
Analytical Determination ◽  
Longitudinal Waves ◽  
One Dimensional ◽  
Pair Plasma ◽  
Unstable Interaction

AbstractThe anisotropic and relativistic features of the pulsar pair plasma are adequately modelled using relativistic one-dimensional Jűttner-Synge distribution functions. The dispersion relation for wave propagation in such a plasma involves coefficients that specifically depend on the distribution function of its particles. An analytical determination of these coefficients allows us to obtain characteristics of quasi-longitudinal waves together with the conditions for the unstable interaction of ultrarelativistic beam and plasma. Similar derivations concern electromagnetic waves.

Envelope solitons associated with electromagnetic waves in a magnetized pair plasma

2005 ◽  
Vol 12 (1) ◽  
pp. 012319 ◽  
Author(s):  
Tom Cattaert ◽  
Ioannis Kourakis ◽  
P. K. Shukla
Keyword(s):  
Electromagnetic Waves ◽  
Pair Plasma ◽  
Envelope Solitons

Nonlinear propagation of intense electromagnetic waves in a hot electron–positron plasma

2010 ◽  
Vol 76 (6) ◽  
pp. 875-886 ◽  
Author(s):  
ROZINA CHAUDHARY ◽  
NODAR L. TSINTSADZE ◽  
P. K. SHUKLA
Keyword(s):  
Electromagnetic Waves ◽  
Modulational Instability ◽  
Distribution Functions ◽  
Nonlinear Propagation ◽  
Landau Damping ◽  
Hot Electron ◽  
Pair Plasma ◽  
Electron Positron ◽  
Nonlinear Landau Damping ◽  
Modulational Instabilities

AbstractThe creation and annihilation of relativistically hot electron–positron (EP) pair plasmas in the presence of intense electromagnetic (EM) waves, which are not in thermal equilibrium, are studied by formulating a new plasma particle distribution functions, which are valid for both relativistic temperatures and relativistic amplitudes of the EM waves. It is found that intense EM waves in a collisionless EP plasma damp via nonlinear Landau damping. Accounting for the latter, we have obtained relativistic kinetic nonlinear Schrödinger equation (NLSE) with local and non-local nonlinearities. The NLSE depicts nonlinear Landau damping rates for intense EM waves. The damping rates are examined for dense and tenuous pair plasmas. Furthermore, we have studied the modulational instabilities of intense EM waves in the presence of nonlinear Landau damping. Our results reveal a new class of the modulational instability that is triggered by the inverse Landau damping in a relativistically hot EP plasma. Finally, we discuss localization of intense EM waves due to relativistic electron and positron mass increase in a hot pair plasma.

Seti Space Missions

1997 ◽  
Vol 161 ◽  
pp. 761-776 ◽  
Author(s):  
Claudio Maccone
Keyword(s):  
Electromagnetic Waves ◽  
Space Missions ◽  
Gravitational Lens ◽  
The Sun ◽  
Space Antenna ◽  
Focal Distance ◽  
Large Space ◽  
The Earth ◽  
Space Antennas ◽  
New Space

AbstractSETI from space is currently envisaged in three ways: i) by large space antennas orbiting the Earth that could be used for both VLBI and SETI (VSOP and RadioAstron missions), ii) by a radiotelescope inside the Saha far side Moon crater and an Earth-link antenna on the Mare Smythii near side plain. Such SETIMOON mission would require no astronaut work since a Tether, deployed in Moon orbit until the two antennas landed softly, would also be the cable connecting them. Alternatively, a data relay satellite orbiting the Earth-Moon Lagrangian pointL2would avoid the Earthlink antenna, iii) by a large space antenna put at the foci of the Sun gravitational lens: 1) for electromagnetic waves, the minimal focal distance is 550 Astronomical Units (AU) or 14 times beyond Pluto. One could use the huge radio magnifications of sources aligned to the Sun and spacecraft; 2) for gravitational waves and neutrinos, the focus lies between 22.45 and 29.59 AU (Uranus and Neptune orbits), with a flight time of less than 30 years. Two new space missions, of SETI interest if ET’s use neutrinos for communications, are proposed.

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