Diffusive shock acceleration in the lobes of the Serpens triple radio source
- Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (USA)
Recent observations of the triple radio source in the Serpens star formation region have shown large proper motions of the lobes. Their radio spectral index is characteristic of nonthermal emission. The possibility that this is synchrotron radiation from relativistic electrons is investigated. Particle acceleration can occur at the bow shock (bullet and jet model) or at the jet termination shock. The rates for ion-neutral damping and for the self-excitation of magnetic field fluctuations are compared. High levels of MHD turbulence and/or high Alfvenic Mach numbers are required to produce a power-law energy spectrum of electrons up to Lorentz factors of 1000. Diffusive shock acceleration of particles is then very efficient. 26 refs.
- OSTI ID:
- 6440399
- Journal Information:
- Astrophysical Journal; (USA), Vol. 361; ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
COSMIC RADIO SOURCES
SYNCHROTRON RADIATION
ACCELERATION
COSMIC GASES
ENERGY SPECTRA
H2 REGIONS
INTERSTELLAR MAGNETIC FIELDS
MAGNETOHYDRODYNAMICS
PLASMA JETS
PROPER MOTION
SHOCK WAVES
TURBULENCE
WAVE PROPAGATION
BREMSSTRAHLUNG
ELECTROMAGNETIC RADIATION
FLUID MECHANICS
FLUIDS
GASES
HYDRODYNAMICS
MAGNETIC FIELDS
MECHANICS
MOTION
RADIATIONS
SPECTRA
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources