Date of Award
8-8-2005
Degree Type
Dissertation
Degree Name
Doctor of Philosophy (PhD)
Department
Physics and Astronomy
First Advisor
H. Richard Miller - Chair
Second Advisor
William G. Bagnuolo, Jr.
Third Advisor
Steve T. Manson
Fourth Advisor
Paul J. Wiita
Fifth Advisor
D. Michael Crenshaw
Abstract
Blazars exhibit the most extreme variability of the class of objects known asactive galactic nuclei (AGN). They are characterized by a featureless continuum, high polarization, and variability at all wavelengths and timescales. The amplitude of optical variations can range from less than 0.1 magnitude on the timescale of minutes to hours, to greater than 5.0 magnitudes on timescales of months to years, and gamma-ray variability amplitudes can span a range of as much as three orders of magnitude in a time-scale as short as a few days. These characteristics are consistent with a supermassive black hole accreting matter at the heart of the host galaxy. However, the observed properties of these objects don't necessarily reflect the intrinsic properties because the emissions have been modified by cosmological distances. The variability of these blazars, which have very different redshifts, have been investigated using several different analytical approaches; i.e. structure function analysis, variability index analysis, and light curve analysis. By transforming observed measurements into the rest frame of the source, the intrinsic properties of the variability can be compared. These variability characteristics of blazars, as seen in their rest frame, and as a function of state, will be discussed in reference to their general characteristics and classification schemes.
DOI
https://doi.org/10.57709/1059803
Recommended Citation
McFarland, John Patrick, "Rest Frame Variability Characteristics of Blazars." Dissertation, Georgia State University, 2005.
doi: https://doi.org/10.57709/1059803