Isaac Shlosman et al 2000 ApJ 535 L83 doi:10.1086/312716
Isaac Shlosman1, Reynier F. Peletier2 and Johan H. Knapen3,4
Show affiliationsUsing all available major samples of Seyfert galaxies and their corresponding closely matched control samples of nonactive galaxies, we find that the bar ellipticities (or axial ratios) in Seyfert galaxies are systematically different from those in nonactive galaxies. Overall, there is a deficiency of bars with large ellipticities (i.e., "thin" or "strong" bars) in Seyfert galaxies compared to nonactive galaxies. Accompanied with a large dispersion due to small number statistics, this effect is strictly speaking at the 2 σ level. To obtain this result, the active galaxy samples of near-infrared surface photometry were matched to those of normal galaxies in type, host galaxy ellipticity, absolute magnitude, and, to some extent, redshift. We discuss possible theoretical explanations of this phenomenon within the framework of galactic evolution, and, in particular, of radial gas redistribution in barred galaxies. Our conclusions provide further evidence that Seyfert hosts differ systematically from their nonactive counterparts on scales of a few kiloparsecs.
galaxies: evolution; galaxies: nuclei; galaxies: Seyfert; galaxies: spiral; galaxies: statistics; infrared: galaxies
Issue 2 (2000 June 1)
Received 1999 November 19, accepted for publication 2000 April 18
Published 2000 May 26
Isaac Shlosman et al 2000 ApJ 535 L83
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