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- W3105004513 endingPage "141" @default.
- W3105004513 startingPage "141" @default.
- W3105004513 abstract "We investigate the connection between the presence of bars and AGN activity, using a volume-limited sample of $sim$9,000 late-type galaxies with axis ratio $b/a>0.6$ and $M_{r} < -19.5+5{rm log}h$ at low redshift ($0.02le zlesssim 0.055$), selected from Sloan Digital Sky Survey Data Release 7. We find that the bar fraction in AGN-host galaxies (42.6%) is $sim$2.5 times higher than in non-AGN galaxies (15.6%), and that the AGN fraction is a factor of two higher in strong-barred galaxies (34.5%) than in non-barred galaxies (15.0%). However, these trends are simply caused by the fact that AGN-host galaxies are on average more massive and redder than non-AGN galaxies because the fraction of strong-barred galaxies ($bfrsbo$) increases with $u-r$ color and stellar velocity dispersion. When $u-r$ color and velocity dispersion (or stellar mass) are fixed, both the excess of $bfrsbo$ in AGN-host galaxies and the enhanced AGN fraction in strong-barred galaxies disappears. Among AGN-host galaxies we find no strong difference of the Eddington ratio distributions between barred and non-barred systems. These results indicate that AGN activity is not dominated by the presence of bars, and that AGN power is not enhanced by bars. In conclusion we do not find a clear evidence that bars trigger AGN activity." @default.
- W3105004513 created "2020-11-23" @default.
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- W3105004513 creator A5057915992 @default.
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- W3105004513 date "2012-04-25" @default.
- W3105004513 modified "2023-10-14" @default.
- W3105004513 title "DO BARS TRIGGER ACTIVITY IN GALACTIC NUCLEI?" @default.
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