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The role of radiation pressure in the narrow line regions of Seyfert host galaxies

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dc.contributor.author Davies, R. L
dc.contributor.author Dopita, M. A
dc.contributor.author Kewley, L
dc.contributor.author Groves, B
dc.contributor.author Sutherland, R
dc.contributor.author Hampton, E. J
dc.contributor.author Shastri, P
dc.contributor.author Kharb, P
dc.contributor.author Bhatt, H. C
dc.contributor.author Scharwachter, J
dc.contributor.author Jin, C
dc.contributor.author Banfield, J
dc.contributor.author Zaw, I
dc.contributor.author James, B
dc.contributor.author Juneau, S
dc.contributor.author Srivastava, S
dc.date.accessioned 2020-11-17T14:30:01Z
dc.date.available 2020-11-17T14:30:01Z
dc.date.issued 2016-06-10
dc.identifier.citation The Astrophysical Journal, Vol. 824, No. 1, 50 en_US
dc.identifier.issn 1538-4357
dc.identifier.uri http://prints.iiap.res.in/handle/2248/7163
dc.description Restricted Access © The American Astronomical Society http://dx.doi.org/10.3847/0004-637X/824/1/50 en_US
dc.description.abstract We investigate the relative significance of radiation pressure and gas pressure in the extended narrow line regions (ENLRs) of four Seyfert galaxies from the integral field Siding Spring Southern Seyfert Spectroscopic Snapshot Survey (S7). We demonstrate that there exist two distinct types of starburst-active galactic nucleus (AGN) mixing curves on standard emission line diagnostic diagrams, which reflect the balance between gas pressure and radiation pressure in the ENLR. In two of the galaxies the ENLR is radiation pressure dominated throughout and the ionization parameter remains constant (log U ~ 0). In the other two galaxies radiation pressure is initially important, but gas pressure becomes dominant as the ionization parameter in the ENLR decreases from log U ~ 0 to −3.2 lesssim log U lesssim −3.4. Where radiation pressure is dominant, the AGN regulates the density of the interstellar medium on kiloparsec scales and may therefore have a direct impact on star formation activity and/or the incidence of outflows in the host galaxy to scales far beyond the zone of influence of the black hole. We find that both radiation pressure dominated and gas pressure dominated ENLRs are dynamically active with evidence for outflows, indicating that radiation pressure may be an important source of AGN feedback even when it is not dominant over the entire ENLR. en_US
dc.language.iso en en_US
dc.publisher IOP Publishing en_US
dc.subject Galaxies: active en_US
dc.subject Galaxies: ISM en_US
dc.subject Galaxies: Seyfert en_US
dc.title The role of radiation pressure in the narrow line regions of Seyfert host galaxies en_US
dc.type Article en_US


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