Thermal Coupling of Ions and Electrons by Collective Effects in 2-Temperature Accretion Flows
Journal
Astrophysical Journal
Journal Volume
332
Journal Issue
2
Pages
872-890
Date Issued
1988
Author(s)
Begelman, Mc
Abstract
view Abstract Citations (96) References (18) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Thermal Coupling of Ions and Electrons by Collective Effects in Two-Temperature Accretion Flows Begelman, Mitchell C. ; Chiueh, Tzihong Abstract The authors have discovered a plasma instability which may lead to the thermal coupling of ions and electrons in two-temperature accretion flows (Ti very large Te), on a time scale shorter than the Coulomb coupling time. The unstable modes include acoustic waves, drift waves, and electromagnetic waves, which propagate nearly perpendicular to the magnetic field in a plasma in which the electron gyroradius is much smaller than the ion Debye length. The instability has time to grow only in regions of large-amplitude, small-scale MHD turbulence, such as one might expect to find near collisionless shocks or sites of magnetic reconnection. Publication: The Astrophysical Journal Pub Date: September 1988 DOI: 10.1086/166698 Bibcode: 1988ApJ...332..872B Keywords: Coupled Modes; Electron-Positron Plasmas; Magnetohydrodynamic Stability; Stellar Mass Accretion; Debye Length; Electromagnetism; Magnetic Field Reconnection; Plasma Turbulence; Sound Waves; Thermal Analysis; Astrophysics; HYDROMAGNETICS; STARS: ACCRETION; TURBULENCE full text sources ADS |
Type
journal article