Stellar population gradients in Seyfert 2 galaxies

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dc.creatorStorchi-Bergmann, Thaisa
dc.creatorRaimann, Daniel I.
dc.creatorDelgado, R. Gonzalez
dc.creatorSchmitt, H. R.
dc.creatorFernandes, R. Cid
dc.creatorHeckman, T.
dc.creatorLeitherer, Claus
dc.date2002-11-21
dc.date.accessioned2026-07-07T02:06:28Z
dc.date.available2026-07-07T02:06:28Z
dc.descriptionWe study the variation of the stellar population properties as a function of distance from the nucleus for a sample of 35 Seyfert 2 galaxies using the technique of stellar population synthesis. We sample regions at the galaxies with dimensions in the range 200 x 200 to 400 x 400 pc and compare the synthesis results with those of a control sample of non-Seyfert galaxies. We find that both at the nucleus and up to 3 kpc from it the oldest age component (10 Gyr) presents a smaller contribution to the total flux in the Seyfert than in the non-Seyfert galaxies of the same Hubble type, while the components younger than 100 Myr present a larger contribution in the Seyfert's than in non-Seyferts. In addition, while for the non-Seyferts clear gradients are present, in which the contribution of the oldest components decrease with distance from the nucleus and the contribution of the 1 Gyr component increases -- we do not find such gradients in most Seyferts. These results suggest that the AGN-starburst connection is a large scale phenomenon affecting not only the inner few hundred parsecs, but the inner kiloparsecs.
dc.description6 pages, 3 figures, to appear in the proceedings of the conference Star Formation through Time, Granada, Sep. 2002, ASP, Eds. Perez, Gonzalez Delgado and Tenorio Tagle
dc.identifierhttps://arxiv.org/abs/astro-ph/0211474
dc.identifierhttp://arxiv.org/abs/astro-ph/0211474
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/5380
dc.subjectAstrophysics
dc.titleStellar population gradients in Seyfert 2 galaxies
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