Quasi-stellar objects as Čerenkov sources

Details Quasi-stellar objects as Čerenkov sources Quasi-stellar objects as Čerenkov sources

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983phla...99..196b&link_type=abstract

Physics Letters A, Volume 99, Issue 4, p. 196-200.

Physics

2

Scientific paper

If a beam of ultrarelativistic charges enters a gas cloud Čerenkov radiation may be produced. The condition for such radiation is given, and the Čerenkov power radiated per charge is compared to the synchrotron power. Intense Čerenkov pulses will excite emission lines via stimulated Raman scattering. Due to anomalous dispersion in the presence of ac Stark effect the Čerenkov field will be most intense at frequencies well red-shifted from atomic resonances, and this red-shift will be a feature of the stimulated Raman line emissions. The intensity ratios and anomalous red-shifts of the broad emission lines of QSOs can be explained. Čerenkov emission froma collimated beam will be highly directional. The emission evidently does not occur in BL Lacs, which are pure synchrotron emitters.

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