The host galaxies of active galactic nuclei

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dc.contributor.authorKauffmann, G
dc.contributor.authorHeckman, TM
dc.contributor.authorTremonti, C
dc.contributor.authorBrinchmann, J
dc.contributor.authorCharlot, S
dc.contributor.authorWhite, SDM
dc.contributor.authorRidgway, SE
dc.contributor.authorBrinkmann, J
dc.contributor.authorFukugita, M
dc.contributor.authorHall, PB
dc.contributor.authorIvezic, Z
dc.contributor.authorRichards, GT
dc.contributor.authorSchneider, DP
dc.date.accessioned2025-01-21T01:08:35Z
dc.date.available2025-01-21T01:08:35Z
dc.date.issued2003
dc.description.abstractWe examine the properties of the host galaxies of 22 623 narrow-line active galactic nuclei (AGN) with 0.02 < z < 0.3 selected from a complete sample of 122 808 galaxies from the Sloan Digital Sky Survey. We focus on the luminosity of the [O III]lambda5007 emission line as a tracer of the strength of activity in the nucleus. We study how AGN host properties compare with those of normal galaxies and how they depend on L[O III]. We find that AGN of all luminosities reside almost exclusively in massive galaxies and have distributions of sizes, stellar surface mass densities and concentrations that are similar to those of ordinary early-type galaxies in our sample. The host galaxies of low-luminosity AGN have stellar populations similar to normal early types. The hosts of high-luminosity AGN have much younger mean stellar ages. The young stars are not preferentially located near the nucleus of the galaxy, but are spread out over scales of at least several kiloparsecs. A significant fraction of high-luminosity AGN have strong Hdelta absorption-line equivalent widths, indicating that they experienced a burst of star formation in the recent past. We have also examined the stellar populations of the host galaxies of a sample of broad-line AGN. We conclude that there is no significant difference in stellar content between type 2 Seyfert hosts and quasars (QSOs) with the same [O III] luminosity and redshift. This establishes that a young stellar population is a general property of AGN with high [O III] luminosities.
dc.fuente.origenWOS
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96486
dc.identifier.wosidWOS:000187256700007
dc.issue.numero4
dc.language.isoen
dc.pagina.final1077
dc.pagina.inicio1055
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjectgalaxies : active
dc.subjectgalaxies : Seyfert
dc.subjectgalaxies : starburst
dc.subjectgalaxies : stellar content
dc.subjectgalaxies : structure
dc.titleThe host galaxies of active galactic nuclei
dc.typeartículo
dc.volumen346
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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