The Host Galaxies of Narrow-Line Seyfert 1s: Evidence for Bar-Driven Fueling

Details The Host Galaxies of Narrow-Line Seyfert 1s: Evidence for Bar-Driven Fueling The Host Galaxies of Narrow-Line Seyfert 1s: Evidence for Bar-Driven Fueling

2003-06-19

arxiv.org/abs/astro-ph/0306404v1

Astron.J.126:1690,2003

Astronomy and Astrophysics

Astrophysics

19 pages, 4 figures (1a, 1b, 2, and 3), Accepted for publication in the Astronomical Journal

Scientific paper

10.1086/377625

We present a study of the host-galaxy morphologies of narrow- and broad-line Seyfert 1 galaxies (NLS1s and BLS1s) based on broad-band optical images from the Hubble Space Telescope archives. We find that large-scale stellar bars, starting at ~1 kpc from the nucleus, are much more common in NLS1s than BLS1s. Furthermore, the fraction of NLS1 spirals that have bars increases with decreasing full-width at half-maximum (FWHM) of the broad component of H-beta. These results suggest a link between the large-scale bars, which can support high fueling rates to the inner kpc, and the high mass-accretion rates associated with the supermassive black holes in NLS1s.

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