Quasar Outflow Contribution to AGN Feedback: Observations of QSO SDSS J0838+2955

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dc.contributorVirginia Techen
dc.contributor.authorMoe, Maxwellen
dc.contributor.authorArav, Nahumen
dc.contributor.authorBautista, M. A.en
dc.contributor.authorKorista, K. T.en
dc.contributor.departmentPhysicsen
dc.date.accessed2014-02-28en
dc.date.accessioned2014-03-10T13:18:50Zen
dc.date.available2014-03-10T13:18:50Zen
dc.date.issued2009-11en
dc.description.abstractWe present a detailed analysis of the Astrophysical Research Consortium 3.5 m telescope spectrum of QSO SDSS J0838+2955. The object shows three broad absorption line (BAL) systems at 22,000, 13,000, and 4900 km s(-1) blueshifted from the systemic redshift of z = 2.043. Of particular interest is the lowest velocity system that displays absorption from low-ionization species such as MgII, Al II, Si II, Si II*, Fe II, and Fe II*. Accurate column densities were measured for all transitions in this lowest velocity BAL using an inhomogeneous absorber model. The ratio of column densities of Si II* and Fe II* with respect to their ground states gave an electron number density of log n(e) (cm(-3)) = 3.75 +/- 0.22 for the outflow. Photoionization modeling with careful regards to chemical abundances and the incident spectral energy distribution predicts an ionization parameter of log U(H) = -1.93 +/- 0.21 and a hydrogen column density of log N(H) (cm(-2)) = 20.80 +/- 0.28. This places the outflow at 3.3(-1.0)(+1.5) kpc from the central active galactic nucleus (AGN). Assuming that the fraction of solid angle subtended by the outflow is 0.2, these values yield a kinetic luminosity of (4.5(-1.8)(+3.1)) x 10(45) erg s(-1), which is (1.4(-0.6))% the bolometric luminosity of the QSO itself. Such large kinetic luminosity suggests that QSO outflows are a major contributor to AGN feedback mechanisms.en
dc.description.sponsorshipNSF AST 0507772en
dc.identifier.citationMaxwell Moe et al. 2009 ApJ 706 525 doi:10.1088/0004-637X/706/1/525en
dc.identifier.doihttps://doi.org/10.1088/0004-637x/706/1/525en
dc.identifier.issn0004-637Xen
dc.identifier.urihttp://hdl.handle.net/10919/25848en
dc.identifier.urlhttp://m.iopscience.iop.org/0004-637X/706/1/525?rel=ref&relno=8en
dc.language.isoen_USen
dc.publisherIOP PUBLISHING LTDen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectgalaxies: evolutionen
dc.subjectquasars: absorption linesen
dc.subjectquasars: individualen
dc.subject(sdss j0838+2955)en
dc.subjectkeck hires observationsen
dc.subjectabsorption-linesen
dc.subjectintrinsic absorptionen
dc.subjectultraviolet-absorptionen
dc.subjecttelescope observationsen
dc.subjectchemical abundancesen
dc.subjectstis observationsen
dc.subjectemission-linesen
dc.subjectbroaden
dc.subjectspectrumen
dc.titleQuasar Outflow Contribution to AGN Feedback: Observations of QSO SDSS J0838+2955en
dc.title.serialAstrophysical Journalen
dc.typeArticle - Refereeden

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