Diffuse ionized regions in the vicinity of active galaxies

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dc.contributor White, Raymond E.
dc.contributor Irwin, Jimmy A.
dc.contributor Crenshaw, Daniel Michael
dc.contributor.advisor Keel, W. C.
dc.contributor.author Darnell, Erin Kay
dc.date.accessioned 2017-03-01T16:25:12Z
dc.date.available 2017-03-01T16:25:12Z
dc.date.issued 2011
dc.identifier.other u0015_0000001_0000864
dc.identifier.other Darnell_alatus_0004M_10948
dc.identifier.uri https://ir.ua.edu/handle/123456789/1366
dc.description Electronic Thesis or Dissertation
dc.description.abstract Using a sample of 39 Active Galactic Nuclei (AGN), we investigated the incidence of giant ionized clouds in the vicinity of active galaxies. We carried out remote observations of the sample using the Southeastern Association for Research in Astronomy (SARA) North telescope at Kitt Peak and the SARA South telescope on Cerro Tololo. Frames were taken in continuum V and using a narrowband filter that transmits the redshifted [O III] 5007 Å line. We formed an emission line image by subtracting the combined and scaled V frames from the combined [O III] frames. To reduce uncorrelated noise, the emission line images are median filtered with a 1".9 x 1".9 box size. To bring out large diffuse regions, we convolve the emission line image with a circular Gaussian function of 3".42 FWHM. Emergent structures are determined to be starlight or ionized gas. 21 members of our sample were recently shown to be tidally disrupted in an atomic Hydrogen (HI) study. No extended [O III]-line emission clouds were seen in the vicinity of any from this group. We found one new instance of extended ionized emission clouds near the Seyfert 1 galaxy RX J1103.2-0654.
dc.format.extent 47 p.
dc.format.medium electronic
dc.format.mimetype application/pdf
dc.language English
dc.language.iso en_US
dc.publisher University of Alabama Libraries
dc.relation.ispartof The University of Alabama Electronic Theses and Dissertations
dc.relation.ispartof The University of Alabama Libraries Digital Collections
dc.relation.hasversion born digital
dc.rights All rights reserved by the author unless otherwise indicated.
dc.subject.other Astronomy
dc.title Diffuse ionized regions in the vicinity of active galaxies
dc.type thesis
dc.type text
etdms.degree.department University of Alabama. Dept. of Physics and Astronomy
etdms.degree.discipline Physics
etdms.degree.grantor The University of Alabama
etdms.degree.level master's
etdms.degree.name M.S.


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