Shocks as the origin of radio-source variability

Details Shocks as the origin of radio-source variability Shocks as the origin of radio-source variability

Apr 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986cajph..64..466h&link_type=abstract

(Conference on Jets from Stars and Galaxies, Toronto, Canada, June 24-27, 1985) Canadian Journal of Physics (ISSN 0008-4204), vo

Astronomy and Astrophysics

Astronomy

1

Astronomical Models, Bl Lacertae Objects, Radio Sources (Astronomy), Shock Waves, Electron Energy, Energy Spectra, Magnetic Fields, Polarized Radiation, Relativistic Velocity

Scientific paper

A model for recent, highly polarized, centimeter-wavelength outbursts of the source BL Lacertae is described in which 'pistons' drive shocks in a collimated, relativistic flow. The compression of a random magnetic field by the shocks produces the polarization, and very weak shocks (M of order 1) are capable of explaining the observations. Short-lived steep spectrum components and short-lived localized changes in magnetic-field direction, expected in this scenario, are exhibited by other sources, suggesting that the model for BL Lacertae is of general applicability.

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