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Investigating the Origin of Gamma-ray Emission in Non-blazar AGN with the Fermi Large Area Telescope

dc.contributor.advisorGoodman, Jordanen_US
dc.contributor.advisorMcEnery, Julieen_US
dc.contributor.authorMcConville, William Francisen_US
dc.date.accessioned2015-02-06T06:45:11Z
dc.date.available2015-02-06T06:45:11Z
dc.date.issued2014en_US
dc.identifierhttps://doi.org/10.13016/M2NP6Q
dc.identifier.urihttp://hdl.handle.net/1903/16202
dc.description.abstractThe Fermi Large Area Telescope (Fermi-LAT) has detected a small sample of gamma-ray loud non-blazar Active Galactic Nuclei (AGN), including the so-called misaligned AGN, whose radio jets are believed to be pointed off-axis with respect to the observer's line of sight, in contrast to the far more populous gamma-ray loud blazars, whose jets are pointed directly toward the line of sight of the observer. The origin of the gamma-ray emission in these misaligned sources has been widely attributed to the so-called "blazar zone" under the pretense of AGN unification, in which the misaligned Fanaroff-Riley type I and II objects are purported to make up the parent population of the BL Lac and FSRQ blazars, respectively. For a number of misaligned sources, the observations prove to be consistent under this scenario, in that the sources demonstrate short timescale gamma-ray variability, thus confining the emission region to a size scale consistent with the inner parsec-scale regions of the jet. Representing an even smaller percentage of non-blazar sources are those that exhibit no evidence of variable gamma-ray emission over timescales of > 3 years. Steady high energy (HE) emission over these timescales, if proven to be statistically significant, relaxes the constraint that would place the gamma-ray emission within a < 1 parsec region consistent with the size scale of the blazar zone. Three sources in particular that have demonstrated no evidence of variability in the LAT range are 4C+55.17, Fornax A, and M87. Each of these objects further demonstrates a unique set of multiwavelength properties that could potentially give rise to gamma-ray emission that is produced outside of the blazar zone. In this thesis, I conduct a detailed investigation into the origin of gamma-rays from each of these objects, and I discuss the multiwavelength properties that could give rise to a steady gamma-ray component consistent with non-blazar emission. Further improvements in LAT analysis techniques are also briefly discussed.en_US
dc.language.isoenen_US
dc.titleInvestigating the Origin of Gamma-ray Emission in Non-blazar AGN with the Fermi Large Area Telescopeen_US
dc.typeDissertationen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.contributor.departmentPhysicsen_US
dc.subject.pqcontrolledPhysicsen_US
dc.subject.pqcontrolledAstrophysicsen_US
dc.subject.pqcontrolledAstronomyen_US
dc.subject.pquncontrolledAGNen_US
dc.subject.pquncontrolledblazaren_US
dc.subject.pquncontrolledcompact symmetric objecten_US
dc.subject.pquncontrolledgamma-raysen_US
dc.subject.pquncontrolledhigh energyen_US
dc.subject.pquncontrolledradio galaxiesen_US


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