The Host Galaxies of Narrow-Line Seyfert 1s: Nuclear Dust Morphology and Starburst Rings

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dc.creatorDeo, R. P.
dc.creatorCrenshaw, D. M.
dc.creatorKraemer, S. B.
dc.date2006-03-29
dc.date.accessioned2026-07-07T11:25:26Z
dc.date.available2026-07-07T11:25:26Z
dc.descriptionWe present a study of the nuclear morphology of a sample of narrow- and broad-line Seyfert 1 galaxies (NLS1's and BLS1's) based on broad-band images in the Hubble Space Telescope archives. In our previous study, we found that large-scale stellar bars at > 1 kpc from the nucleus are more common in NLS1's than BLS1's. In this paper we find that NLS1's preferentially have grand-design dust spirals within approx. 1 kpc of their centers. We also find that NLS1's have a higher fraction of nuclear star-forming rings than BLS1's. We find that many of the morphological differences are due to the presence or absence of a large-scale stellar bar within the spiral host galaxy. In general, barred Seyfert 1s tend to have grand-design dust spirals at their centers, confirming the results of other researchers. The high fraction of grand-design nuclear dust spirals and stellar nuclear rings observed in NLS1's host galaxies suggests a means for efficient fueling of their nuclei to support their high Eddington ratios.
dc.description52 pages total, 4 tables, 17 figures; high resolution version of this paper is available from http://www.chara.gsu.edu/~deo/research/paper.html
dc.identifierhttps://arxiv.org/abs/astro-ph/0603806
dc.identifierhttp://arxiv.org/abs/astro-ph/0603806
dc.identifierAstron.J.132:321-346,2006
dc.identifierdoi:10.1086/504894
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/195507
dc.subjectAstrophysics
dc.titleThe Host Galaxies of Narrow-Line Seyfert 1s: Nuclear Dust Morphology and Starburst Rings
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