%0 Generic %1 nedelchev2017feedback %A Nedelchev, Borislav %A Sarzi, Marc %A Kaviraj, Sugata %D 2017 %K agn cold feedback formation gas star %T This is not the feedback you have been looking for: nearby optical AGN rarely drive kpc-scale cold-gas outflows %U http://arxiv.org/abs/1705.07994 %X We study the interstellar Na I $5890, 5895$ (Na D) absorption-line doublet in a nearly-complete sample of $\sim$9900 nearby Seyfert 2 galaxies, in order to quantify the significance of optical AGN activity in driving kpc-scale outflows that can quench star formation. Comparison to a carefully matched sample of $\sim$44,000 control objects indicates that the Seyfert and control population have similar Na D detection rates ($5-6%$). Only 53 Seyferts (or 0.5% of the population) are found to potentially display galactic-scale winds, compared to 0.8% of the control galaxies. While nearly a third of the Na D outflows observed in our Seyfert 2 galaxies occur around the brightest AGN, both radio and infrared data indicate that star formation could play the dominant role in driving cold-gas outflows in an even higher fraction of the Na D-outflowing Seyfert 2s. Our results indicate that galactic-scale outflows at low redshift are no more frequent in Seyferts than they are in their non-active counterparts, that optical AGN are not significant contributors to the quenching of star formation in the nearby Universe, and that star-formation may actually be the principal driver of outflows even in systems that do host an AGN.

@misc{nedelchev2017feedback, abstract = {We study the interstellar Na I $\lambda \lambda 5890, 5895$ (Na D) absorption-line doublet in a nearly-complete sample of $\sim$9900 nearby Seyfert 2 galaxies, in order to quantify the significance of optical AGN activity in driving kpc-scale outflows that can quench star formation. Comparison to a carefully matched sample of $\sim$44,000 control objects indicates that the Seyfert and control population have similar Na D detection rates ($\sim 5-6%$). Only 53 Seyferts (or 0.5% of the population) are found to potentially display galactic-scale winds, compared to 0.8% of the control galaxies. While nearly a third of the Na D outflows observed in our Seyfert 2 galaxies occur around the brightest AGN, both radio and infrared data indicate that star formation could play the dominant role in driving cold-gas outflows in an even higher fraction of the Na D-outflowing Seyfert 2s. Our results indicate that galactic-scale outflows at low redshift are no more frequent in Seyferts than they are in their non-active counterparts, that optical AGN are not significant contributors to the quenching of star formation in the nearby Universe, and that star-formation may actually be the principal driver of outflows even in systems that do host an AGN.}, added-at = {2017-05-24T09:47:23.000+0200}, author = {Nedelchev, Borislav and Sarzi, Marc and Kaviraj, Sugata}, biburl = {https://www.bibsonomy.org/bibtex/20b7e1a5d009001e6bc6c00648fe14635/miki}, description = {[1705.07994] This is not the feedback you have been looking for: nearby optical AGN rarely drive kpc-scale cold-gas outflows}, interhash = {3893155c596bb1039a30e9f298a8faf9}, intrahash = {0b7e1a5d009001e6bc6c00648fe14635}, keywords = {agn cold feedback formation gas star}, note = {cite arxiv:1705.07994Comment: Comments are welcome}, timestamp = {2017-05-24T09:47:23.000+0200}, title = {This is not the feedback you have been looking for: nearby optical AGN rarely drive kpc-scale cold-gas outflows}, url = {http://arxiv.org/abs/1705.07994}, year = 2017 }