The Examination of Optical Microvariability in Radio-quiet and Radio-loud Quasi-stellar Objects

Details The Examination of Optical Microvariability in Radio-quiet and Radio-loud Quasi-stellar Objects The Examination of Optical Microvariability in Radio-quiet and Radio-loud Quasi-stellar Objects

Oct 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...452..582j&link_type=abstract

Astrophysical Journal v.452, p.582

Astronomy and Astrophysics

Astronomy

41

Galaxies: Photometry, Galaxies: Quasars: General, Radio Continuum: Galaxies

Scientific paper

Preliminary results of a continuing search for significant optical microvariations in a selected sample of radio-quiet and radio-loud quasi-stellar objects are reported. Only one object out of nine radio-quiet QSOs observed shows night-to-night variations in brightness. On the contrary, all four radio-loud QSOs which were observed show evidence for microvariations. The absence of the microvariations does not provide support for theoretical models utilizing discrete events in accretion disks. Therefore, our results are consistent with models based on shocks propagating down relativistic jets as the most likely process responsible for producing most of the microvariations observed in the AGNs.

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