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- W3103434626 abstract "The various ionization mechanisms at play in active galactic nuclei (AGN) and quasars have been well studied, but relatively little has been done to separately investigate the contributions of these ionization mechanisms within the host galaxy and outflowing components. Using Gemini integral field spectroscopy (IFS) data, we study the ionization properties of these two components in four nearby ($z lesssim$ 0.2) radio-quiet Type 1 quasars. Emission line ratios and widths are employed to identify the dominant ionization mechanisms for the host and outflow components in each object. We find that photoionization by the AGN often dominates the ionization of both gaseous components in these systems. In three cases, the outflowing gas is more highly ionized than the gas in the host, indicating that it is more strongly exposed to the ionizing radiation field of the AGN. In two objects, a positive correlation between the line widths and line ratios in the outflowing gas component indicates that shocks with velocities of order 100 $-$ 500 km s$^{-1}$ may also be contributing to the ionization and heating of the outflowing gas component. The line ratios in the outflowing gas of one of these two objects also suggest a significant contribution from photoionization by hot, young stars in the portion of the outflow that is closest to star-forming regions in the host galaxy component. The data thus favor photoionization by hot stars in the host galaxy rather than stars formed in the outflow itself." @default.
- W3103434626 created "2020-11-23" @default.
- W3103434626 creator A5031742292 @default.
- W3103434626 creator A5031948703 @default.
- W3103434626 creator A5033229802 @default.
- W3103434626 date "2019-08-09" @default.
- W3103434626 modified "2023-09-23" @default.
- W3103434626 title "Ionization Mechanisms in Quasar Outflows" @default.
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- W3103434626 doi "https://doi.org/10.3847/1538-4357/ab2bfa" @default.
- W3103434626 hasPublicationYear "2019" @default.
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