Portal de Periódicos da CAPES

The magnetic dipole model for superluminal radio sources

1980; IOP Publishing; Volume: 236; Linguagem: Inglês

10.1086/157715

1538-4357

John N. Bahcall, Mordehai Milgrom,

Particle Accelerators and Free-Electron Lasers

view Abstract Citations (15) References (34) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The magnetic dipole model for superluminal radio sources Bahcall, J. N. ; Milgrom, M. Abstract The magnetic dipole model (MAD) for superluminal radio sources is described in detail. Analytic derivations are presented for a number of observationally accessible kinematic quantities, as well as for the size and shape of the radio lobes and the probability distributions for the velocities. The results are in satisfactory agreement with observations. The astrophysical aspects of MAD are discussed assuming that the dominant emission mechanism is curvature radiation. The possibility that the local radius of curvature of the magnetic field is much smaller than the curvature radius of an ideal dipole field is considered. The physical effects that are discussed include coherent emission and absorption, circular and linear polarization, and inverse Compton scattering. The time-dependence of the flux and the shape of the spectrum that are deduced on the basis of the assumed emission mechanism are consistent with observation. Publication: The Astrophysical Journal Pub Date: February 1980 DOI: 10.1086/157715 Bibcode: 1980ApJ...236...24B Keywords: Astrophysics; Magnetic Dipoles; Magnetohydrodynamics; Radio Sources (Astronomy); Astronomical Models; Compton Effect; Geometrical Optics; Kinematics; Polarization Characteristics; Astrophysics full text sources ADS |