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Changing ionization conditions in Sdss galaxies with active galactic nuclei as a function of environment from pairs to clusters

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dc.contributor.authorKhabiboulline, Emil T.en
dc.contributor.authorSteinhardt, Charles L.en
dc.contributor.authorSilverman, John D.en
dc.contributor.authorEllison, Sara L.en
dc.contributor.authorMendel, J. Trevoren
dc.contributor.authorPatton, David R.en
dc.date.accessioned2026-01-01T14:42:05Z
dc.date.available2026-01-01T14:42:05Z
dc.date.issued2014-11-01en
dc.description.abstractWe study how active galactic nucleus (AGN) activity changes across environments from galaxy pairs to clusters using 143,843 galaxies with z < 0.2 from the Sloan Digital Sky Survey. Using a refined technique, we apply a continuous measure of AGN activity, characteristic of the ionization state of the narrow-line emitting gas. Changes in key emission-line ratios ([N II] λ6548/Hα, [O III] λ5007/Hβ) between different samples allow us to disentangle different environmental effects while removing contamination. We confirm that galaxy interactions enhance AGN activity. However, conditions in the central regions of clusters are inhospitable for AGN activity even if galaxies are in pairs. These results can be explained through models of gas dynamics in which pair interactions stimulate the transfer of gas to the nucleus and clusters suppress gas availability for accretion onto the central black hole.en
dc.description.statusPeer-revieweden
dc.identifier.issn0004-637Xen
dc.identifier.scopus84908032002en
dc.identifier.urihttps://hdl.handle.net/1885/733801111
dc.language.isoenen
dc.rightsPublisher Copyright: © 2014. The American Astronomical Society. All rights reserved.en
dc.sourceAstrophysical Journalen
dc.subjectgalaxies: activeen
dc.subjectgalaxies: clusters: generalen
dc.subjectgalaxies: interactionsen
dc.subjectgalaxies: nucleien
dc.titleChanging ionization conditions in Sdss galaxies with active galactic nuclei as a function of environment from pairs to clustersen
dc.typeJournal articleen
dspace.entity.typePublicationen
local.contributor.affiliationKhabiboulline, Emil T.; California Institute of Technologyen
local.contributor.affiliationSteinhardt, Charles L.; California Institute of Technologyen
local.contributor.affiliationSilverman, John D.; The University of Tokyoen
local.contributor.affiliationEllison, Sara L.; University of Victoria BCen
local.contributor.affiliationMendel, J. Trevor; Max Planck Institute for Extraterrestrial Physicsen
local.contributor.affiliationPatton, David R.; Trent Universityen
local.identifier.citationvolume795en
local.identifier.doi10.1088/0004-637X/795/1/62en
local.identifier.pure8bececbd-6ead-4c3f-9470-8a52f3f33e14en
local.identifier.urlhttps://www.scopus.com/pages/publications/84908032002en
local.type.statusPublisheden

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