Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...225..725m&link_type=abstract
Astrophysical Journal, Part 1, vol. 225, Nov. 1, 1978, p. 725-731.
Astronomy and Astrophysics
Astrophysics
6
Bremsstrahlung, Emission Spectra, Explosions, Quasars, Shock Heating, Stellar Spectra, Bl Lacertae Objects, Detonation Waves, Forbidden Bands, Optical Emission Spectroscopy, Relativistic Plasmas, X Rays
Scientific paper
The conditions under which QSO line-emitting regions can survive a relativistic explosion are investigated along with the question of whether past and future observations can place constraints on both predicted highly energetic outbursts of ultrarelativistic plasma or LF electromagnetic radiation and the line-emitting gas. Observed properties of QSO emission-line regions are reviewed, and the interaction between a relativistic explosion and a dense cloud is analyzed for the cases of a sudden release of relativistic plasma and an outburst of LF electromagnetic waves. Bremsstrahlung X-ray emission from shocked QSO filaments is calculated, the evolution of dense QSO clouds is examined, and radiative acceleration is excluded as the process responsible for the high bulk velocities of filaments, at least in sources that display energetic outbursts. An alternative mechanism involving highly energetic explosions is proposed.
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