Four barred AGN galaxies show C(Hα)/C(CO) ratios of 0.3-0.4 while 13 others show ratios near 1, interpreted as AGN feedback suppressing central star formation after bar-driven gas accumulation.
Each of these three populations has a distinctive gas mass fraction ( /u1D453gas = /u1D440 H2 / /u1D440 ∗) range
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Suppression of star formation at the centre of barred AGN galaxies
Four barred AGN galaxies show C(Hα)/C(CO) ratios of 0.3-0.4 while 13 others show ratios near 1, interpreted as AGN feedback suppressing central star formation after bar-driven gas accumulation.