Searching for nucleus obscuration in the infrared spectra of nearby FR-I radio galaxies

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dc.contributor.authorGleisinger, Robert
dc.contributor.examiningcommitteeSafi-Harb, Samar (Physics and Astronomy) Van Wijngaarden, Jennifer (Chemistry)en_US
dc.contributor.supervisorO'Dea, Christopher (Physics and Astronomy)en_US
dc.date.accessioned2018-08-27T13:50:31Z
dc.date.available2018-08-27T13:50:31Z
dc.date.issued2018-08en_US
dc.date.submitted2018-08-15T21:13:40Zen
dc.degree.disciplinePhysics and Astronomyen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractWhy are there so many types of active galactic nuclei (AGN)? Astronomers have proposed numerous AGN unification models to explain the vast array of different AGN types with a single type of object. The most prominent of these features a supermassive black hole’s accretion disk obscured by a torus of discrete dusty clouds. The applicability of this model to low-luminosity AGN such as Fanaroff & Riley class I (FR-I) radio galaxies is controversial. We present a wide-band infrared spectroscopic analysis of ten nearby FR-I radio galaxies. We used Markov-chain Monte Carlo algorithms to fit a set of models to Spitzer /IRS spectra with wide-band behaviour constrained by photometry from 2MASS, Spitzer /IRAC, Spitzer /MIPS, and Herschel /SPIRE. We find one galaxy is best fit by a torus and three others show some thermal mid-infrared component. We conclude that 40% of our FR-I radio galaxies show evidence of obscuring dusty material.en_US
dc.description.noteOctober 2018en_US
dc.identifier.urihttp://hdl.handle.net/1993/33226
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.subjectGalaxiesen_US
dc.subjectAstronomyen_US
dc.subjectSpectroscopyen_US
dc.subjectActive galactic nucleien_US
dc.subjectInfrared astronomyen_US
dc.titleSearching for nucleus obscuration in the infrared spectra of nearby FR-I radio galaxiesen_US
dc.typemaster thesisen_US
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