Relativistic blast-wave model for the rapid flux variations of AO 0235+164 and other compact radio sources

Details Relativistic blast-wave model for the rapid flux variations of AO 0235+164 and other compact radio sources Relativistic blast-wave model for the rapid flux variations of AO 0235+164 and other compact radio sources

Sep 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...224..816m&link_type=abstract

Astrophysical Journal, Part 1, vol. 224, Sept. 15, 1978, p. 816-825.

Astronomy and Astrophysics

Astrophysics

16

Astronomical Models, Detonation Waves, Extragalactic Radio Sources, Radiant Flux Density, Relativistic Velocity, Brightness Temperature, Compton Effect, Screen Effect, Shock Wave Propagation, Synchrotron Radiation

Scientific paper

A relativistic blast-wave version of a signal-screen model is developed which can adequately explain the details of the flux-density and structural variations of compact extragalactic radio sources. The relativistic motion implied by flux variations is analyzed with respect to the synchrotron spectrum of the BL Lac object AO 0235+164 observed during outbursts, and a signal-screen model for rapidly expanding shells produced by ultrarelativistic blast waves is examined. The approximate observed structure of the blast wave at three stages in its evolution is illustrated, each stage is described, and the model is applied to the flux density outburst in AO 0235+164 observed in late 1975. The results show that a relativistic blast-wave model can in general reproduce the main features of the observed flux variations in compact sources. Some problems with the proposed model are briefly discussed.

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